{"id":1,"date":"2025-02-19T09:33:15","date_gmt":"2025-02-19T01:33:15","guid":{"rendered":"http:\/\/blog.nimail.cn\/?p=1"},"modified":"2025-03-19T09:49:07","modified_gmt":"2025-03-19T01:49:07","slug":"1","status":"publish","type":"post","link":"https:\/\/blog.nimail.cn\/best-articles\/1\/","title":{"rendered":"\u7206\u809d\u6574\u7406\u7684Golang\u9762\u8bd5\u9898\uff0c\u62ff\u8d70\u4e0d\u8c22"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u524d\u8a00<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1\u3001\u7533\u660e<\/h3>\n\n\n\n<p>\u6587\u7ae0\u90e8\u5206\u9898\u76ee\u6765\u6e90\u4e8e\u7f51\u7edc\uff0c\u7b54\u6848\u7cfb\u4e2a\u4eba\u7ed3\u54085\u6708\u4efd\u9762\u8bd5\u4e86\u8fd130\u5bb6\u516c\u53f8\u6574\u7406\u6240\u5f97\uff0c\u6700\u540e\u9644\u5f55\u53c2\u8003\u539f\u6587\u94fe\u63a5\uff0c\u5982\u6709\u9057\u6f0f\u7684\u539f\u6587\u51fa\u5904\u8bf7\u8054\u7cfb\u672c\u4eba\u3002\u4e0d\u5bf9\u4e4b\u5904\u671b\u6279\u8bc4\u6307\u6b63\uff0c\u7b54\u6848\u9700\u8981\u52a0\u4e0a\u81ea\u5df1\u7684\u601d\u8003\uff0c\u6700\u597d\u662f\u4ee3\u7801\u5b9e\u8df5\u4e0b\u3002<\/p>\n\n\n\n<p>\u53c2\u4e0e\u8fc7\u9762\u8bd5\u7684\u4f01\u4e1a\u6709\uff1azg\u4eba\u5bff\uff0c\u777f\u79d1lun,qi\u732b\uff0cyun\u6c49\u5546\u57ce\uff0czi\u8282\u8df3\u52a8\uff0c\u7279\u65afla\uff0c\u867eP\uff0cchuan\u97f3\uff0cqi\u5b89\u4fe1\uff0cai\u7acb\u4fe1\u7b49\u5927\u5927\u5c0f\u5c0f\u4f01\u4e1a\u8fd130\u5bb6\uff0cBAT\u7b80\u5386\u90fd\u8fc7\u4e0d\u4e86\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2\u3001\u9762\u8bd5\u5efa\u8bae<\/h3>\n\n\n\n<p><strong>\u6280\u672f\u90e8\u5206<\/strong><\/p>\n\n\n\n<p>1\uff09\u3001\u7b97\u6cd5\u90e8\u5206\uff0c\u5237LeetCode\u5c31\u5b8c\u4e8b\u4e86,\u8fd9\u662f\u4e00\u4e2a\u957f\u671f\u7684\u8fc7\u7a0b\uff0c\u77ed\u671f\u7a81\u51fb\u6ca1\u5565\u6548\u679c\uff0c\u56e0\u4e3a\u9898\u76ee\u592a\u591a\u4e86\u3002<\/p>\n\n\n\n<p>2\uff09\u3001\u8bed\u8a00\u57fa\u7840\uff0c\u7ec6\u5206\u4e3a\uff1agolang\u57fa\u7840\u53ca\u539f\u7406\uff0c\u5c31\u662f\u672c\u6587\u4e3b\u8981\u5185\u5bb9\u4e86\uff1bmysql\u57fa\u7840\u53ca\u539f\u7406\uff1bredis\u57fa\u7840\u53ca\u539f\u7406;kafka\u6216\u5176\u4ed6\u6d88\u606f\u4e2d\u95f4\u4ef6\uff08\u5982\u679c\u6ca1\u7528\u8fc7\uff0c\u9700\u8981\u4e86\u89e3\u5927\u6982\u7684\u5e95\u5c42\u539f\u7406\u53ca\u7ed3\u6784\uff09\uff1blinux\u5e38\u7528\u7684\u547d\u4ee4\uff0c\u6bd4\u5982\u5b9a\u65f6\u811a\u672c\u51e0\u4e2a\u53c2\u6570\u65f6\u95f4\u5206\u522b\u4ee3\u8868\u5565\uff0c\u6587\u4ef6\u6743\u9650\u9700\u8981\u641e\u6e05\u695a\uff0c\u8fdb\u7a0b\u5185\u5b58\u5360\u7528\u547d\u4ee4\uff1b\u5c0f\u516c\u53f8\u8fd8\u8981\u61c2\u4e00\u4e9b\u524d\u7aef\u7684\u77e5\u8bc6\uff0c\u56e0\u4e3a\u4ed6\u4eec\u5e0c\u671b\u4f60\u4ec0\u4e48\u90fd\u4f1a\u3002<\/p>\n\n\n\n<p>\u5efa\u8bae\u5927\u5bb6\u53ef\u4ee5\u53bb\u725b\u5ba2\u7f51\u4e0a\u591a\u5237\u5237Golong\u9898\u5e93\uff0c\u9898\u5e93\u603b\u7ed3\u7684\u5f88\u5230\u4f4d\uff0c\u800c\u4e14\u9898\u76ee\u8d28\u91cf\u4e5f\u5f88\u9ad8\uff0c\u65b9\u4fbf\u5de9\u56fa\u8bed\u6cd5\u57fa\u7840\uff0c\u8fd8\u53ef\u4ee5\u53bb\u770b\u524d\u7aef\u9762\u8bd5\u9898\u5e93\uff0c\u9898\u76ee\u5f88\u5168\u8fd8\u914d\u6709\u7b54\u6848\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5feb\u901f\u7684\u4e86\u89e3\u524d\u7aef\u77e5\u8bc6\u3002<\/p>\n\n\n\n<p>3\uff09\u3001\u9879\u76ee\u7ecf\u9a8c\uff0c\u53ef\u4ee5\u641e\u4e00\u4e2a\u57fa\u4e8egin\u7684\u540e\u7aef\u63a5\u53e3\u670d\u52a1\u7684web\u6846\u67b6\uff0c\u4e00\u822c\u4f1a\u95ee\u4f60\u600e\u4e48\u5b9e\u73b0\u7684\uff1b\u4ee5\u53ca\u5fae\u670d\u52a1\u4e86\u89e3\u4e00\u4e0b\u3002<\/p>\n\n\n\n<p><strong>\u975e\u6280\u672f\u90e8\u5206<\/strong><\/p>\n\n\n\n<p>1\uff09\u56e0\u4e3a\u4e0a\u6d775\u6708\u4efd\u5c45\u5bb6\u529e\u516c\uff0c\u8fdc\u7a0b\u9762\u8bd5\uff0c\u8fd9\u4e9b\u9898\u76ee\u51c6\u5907\u4e00\u4efd\uff0c\u9047\u5230\u5361\u58f3\u7684\u9898\u76ee\u5b8c\u5168\u53ef\u4ee5\u53c2\u8003\u4f60\u51c6\u5907\u597d\u7684\u7b54\u6848\uff0c\u56e0\u4e3a\u89c6\u9891\u9762\u8bd5\u4f60\u773c\u775b\u662f\u770b\u7740\u9762\u8bd5\u5b98\u8fd8\u662f\u9898\u76ee\u662f\u4e0d\u592a\u5bb9\u6613\u533a\u5206\u7684\uff08\u628a\u9898\u76ee\u7a97\u53e3\u7f6e\u9876\uff09\u3002<\/p>\n\n\n\n<p>2\uff09HR\u9762\u4e5f\u53ef\u4ee5\u5b8c\u5168\u51c6\u5907\u4e00\u4efd\u53ef\u80fd\u95ee\u5230\u7684\u95ee\u9898\u7684\u7b54\u6848\uff0c\u5e76\u4e0d\u662f\u8bf4\u4f60\u4e0d\u4f1a\u56de\u7b54\uff0c\u800c\u662f\u4f1a\u8ba9\u4f60\u7684\u8868\u8fbe\u66f4\u987a\u7545\uff0c\u5176\u6b21\u4e5f\u8bf4\u660e\u4f60\u662f\u6709\u5907\u800c\u6765\u7684\uff0c\u6211\u5728\u67d0\u62c9\u516c\u53f8\u9762\u8bd5\u5c31\u5403\u4e86\u8fd9\u4e2a\u4e8f\uff0c\u6280\u672f\u901a\u8fc7\uff0cHR\u8bf4\u6211\u7684\u8868\u8fbe\u80fd\u529b\u4e0d\u884c\uff08\u540e\u7eed\u6211\u4e5f\u4f1a\u628a\u8fd9\u4e2a\u6a21\u677f\u5206\u4eab\u51fa\u6765\uff0c\u611f\u8c22\u6211\u5ab3\u5987\u5145\u5f53\u9762\u8bd5\u5b98\uff0c\u4ee5\u53ca\u6307\u5bfc\u5982\u4f55\u9ad8\u60c5\u5546\u7684\u56de\u7b54HR\u7684\u95ee\u9898\uff09\u3002<\/p>\n\n\n\n<p>3\uff09\u53ef\u4ee5\u81ea\u5df1\u5f55\u97f3\u9762\u8bd5\u56de\u7b54\uff0c\u770b\u770b\u81ea\u5df1\u7684\u8bed\u6c14\u3001\u97f3\u91cf\uff0c\u987a\u7545\u5ea6\uff0c\u5982\u679c\u81ea\u5df1\u542c\u4e86\u90fd\u4e0d\u8212\u670d\uff0c\u9762\u8bd5\u5b98\u53ef\u80fd\u4e5f\u4e0d\u8212\u670d\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e00\u3001\u57fa\u7840\u90e8\u5206<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1\u3001golang \u4e2d make \u548c new \u7684\u533a\u522b\uff1f\uff08\u57fa\u672c\u5fc5\u95ee\uff09<\/strong><\/h3>\n\n\n\n<p><strong>\u5171\u540c\u70b9\uff1a<\/strong>\u7ed9\u53d8\u91cf\u5206\u914d\u5185\u5b58<\/p>\n\n\n\n<p><strong>\u4e0d\u540c\u70b9\uff1a<\/strong><\/p>\n\n\n\n<p>1\uff09\u4f5c\u7528\u53d8\u91cf\u7c7b\u578b\u4e0d\u540c\uff0cnew\u7ed9string,int\u548c\u6570\u7ec4\u5206\u914d\u5185\u5b58\uff0cmake\u7ed9\u5207\u7247\uff0cmap\uff0cchannel\u5206\u914d\u5185\u5b58\uff1b<\/p>\n\n\n\n<p>2\uff09\u8fd4\u56de\u7c7b\u578b\u4e0d\u4e00\u6837\uff0cnew\u8fd4\u56de\u6307\u5411\u53d8\u91cf\u7684\u6307\u9488\uff0cmake\u8fd4\u56de\u53d8\u91cf\u672c\u8eab\uff1b<\/p>\n\n\n\n<p>3\uff09new \u5206\u914d\u7684\u7a7a\u95f4\u88ab\u6e05\u96f6\u3002make \u5206\u914d\u7a7a\u95f4\u540e\uff0c\u4f1a\u8fdb\u884c\u521d\u59cb\u5316\uff1b<\/p>\n\n\n\n<p>4) \u5b57\u8282\u7684\u9762\u8bd5\u5b98\u8fd8\u8bf4\u4e86\u53e6\u5916\u4e00\u4e2a\u533a\u522b\uff0c\u5c31\u662f\u5206\u914d\u7684\u4f4d\u7f6e\uff0c\u5728\u5806\u4e0a\u8fd8\u662f\u5728\u6808\u4e0a\uff1f\u8fd9\u5757\u6211\u6bd4\u8f83\u6a21\u7cca\uff0c\u5927\u5bb6\u53ef\u4ee5\u81ea\u5df1\u63a2\u7a76\u4e0b\uff0c\u6211\u641c\u7d22\u51fa\u6765\u7684\u7b54\u6848\u662fgolang\u4f1a\u5f31\u5316\u5206\u914d\u7684\u4f4d\u7f6e\u7684\u6982\u5ff5\uff0c\u56e0\u4e3a\u7f16\u8bd1\u7684\u65f6\u5019\u4f1a\u81ea\u52a8\u5185\u5b58\u9003\u9038\u5904\u7406\uff0c\u61c2\u7684\u5927\u4f6c\u5e2e\u5fd9\u8865\u5145\u4e0b\uff1amake\u3001new\u5185\u5b58\u5206\u914d\u662f\u5728\u5806\u4e0a\u8fd8\u662f\u5728\u6808\u4e0a\uff1f<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2\u3001\u6570\u7ec4\u548c\u5207\u7247\u7684\u533a\u522b \uff08\u57fa\u672c\u5fc5\u95ee\uff09<\/strong><\/h3>\n\n\n\n<p><strong>\u76f8\u540c\u70b9\uff1a<\/strong><\/p>\n\n\n\n<p>1)\u53ea\u80fd\u5b58\u50a8\u4e00\u7ec4\u76f8\u540c\u7c7b\u578b\u7684\u6570\u636e\u7ed3\u6784<\/p>\n\n\n\n<p>2)\u90fd\u662f\u901a\u8fc7\u4e0b\u6807\u6765\u8bbf\u95ee\uff0c\u5e76\u4e14\u6709\u5bb9\u91cf\u957f\u5ea6\uff0c\u957f\u5ea6\u901a\u8fc7 len \u83b7\u53d6\uff0c\u5bb9\u91cf\u901a\u8fc7 cap \u83b7\u53d6<\/p>\n\n\n\n<p><strong>\u533a\u522b\uff1a<\/strong><\/p>\n\n\n\n<p>1\uff09\u6570\u7ec4\u662f\u5b9a\u957f\uff0c\u8bbf\u95ee\u548c\u590d\u5236\u4e0d\u80fd\u8d85\u8fc7\u6570\u7ec4\u5b9a\u4e49\u7684\u957f\u5ea6\uff0c\u5426\u5219\u5c31\u4f1a\u4e0b\u6807\u8d8a\u754c\uff0c\u5207\u7247\u957f\u5ea6\u548c\u5bb9\u91cf\u53ef\u4ee5\u81ea\u52a8\u6269\u5bb9<\/p>\n\n\n\n<p>2\uff09\u6570\u7ec4\u662f\u503c\u7c7b\u578b\uff0c\u5207\u7247\u662f\u5f15\u7528\u7c7b\u578b\uff0c\u6bcf\u4e2a\u5207\u7247\u90fd\u5f15\u7528\u4e86\u4e00\u4e2a\u5e95\u5c42\u6570\u7ec4\uff0c\u5207\u7247\u672c\u8eab\u4e0d\u80fd\u5b58\u50a8\u4efb\u4f55\u6570\u636e\uff0c\u90fd\u662f\u8fd9\u5e95\u5c42\u6570\u7ec4\u5b58\u50a8\u6570\u636e\uff0c\u6240\u4ee5\u4fee\u6539\u5207\u7247\u7684\u65f6\u5019\u4fee\u6539\u7684\u662f\u5e95\u5c42\u6570\u7ec4\u4e2d\u7684\u6570\u636e\u3002\u5207\u7247\u4e00\u65e6\u6269\u5bb9\uff0c\u6307\u5411\u4e00\u4e2a\u65b0\u7684\u5e95\u5c42\u6570\u7ec4\uff0c\u5185\u5b58\u5730\u5740\u4e5f\u5c31\u968f\u4e4b\u6539\u53d8<\/p>\n\n\n\n<p><strong>\u7b80\u6d01\u7684\u56de\u7b54\uff1a<\/strong><\/p>\n\n\n\n<p>1\uff09\u5b9a\u4e49\u65b9\u5f0f\u4e0d\u4e00\u6837 2\uff09\u521d\u59cb\u5316\u65b9\u5f0f\u4e0d\u4e00\u6837\uff0c\u6570\u7ec4\u9700\u8981\u6307\u5b9a\u5927\u5c0f\uff0c\u5927\u5c0f\u4e0d\u6539\u53d8 3\uff09\u5728\u51fd\u6570\u4f20\u9012\u4e2d\uff0c\u6570\u7ec4\u5207\u7247\u90fd\u662f\u503c\u4f20\u9012\u3002<\/p>\n\n\n\n<p><strong>\u6570\u7ec4\u7684\u5b9a\u4e49<\/strong><\/p>\n\n\n\n<p>var a1 [3]int<\/p>\n\n\n\n<p>var a2 [&#8230;]int{1,2,3}<\/p>\n\n\n\n<p><strong>\u5207\u7247\u7684\u5b9a\u4e49<\/strong><\/p>\n\n\n\n<p>var a1 []int<\/p>\n\n\n\n<p>var a2 :=make([]int,3,5)<\/p>\n\n\n\n<p><strong>\u6570\u7ec4\u7684\u521d\u59cb\u5316<\/strong><\/p>\n\n\n\n<p>a1 := [&#8230;]int{1,2,3}<\/p>\n\n\n\n<p>a2 := [5]int{1,2,3}<\/p>\n\n\n\n<p><strong>\u5207\u7247\u7684\u521d\u59cb\u5316<\/strong><\/p>\n\n\n\n<p>b:= make([]int,3,5)<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3\u3001for range \u7684\u65f6\u5019\u5b83\u7684\u5730\u5740\u4f1a\u53d1\u751f\u53d8\u5316\u4e48\uff1f<\/strong><\/h3>\n\n\n\n<p>\u7b54\uff1a\u5728 for a,b := range c \u904d\u5386\u4e2d\uff0c a \u548c b \u5728\u5185\u5b58\u4e2d\u53ea\u4f1a\u5b58\u5728\u4e00\u4efd\uff0c\u5373\u4e4b\u540e\u6bcf\u6b21\u5faa\u73af\u65f6\u904d\u5386\u5230\u7684\u6570\u636e\u90fd\u662f\u4ee5\u503c\u8986\u76d6\u7684\u65b9\u5f0f\u8d4b\u7ed9 a \u548c b\uff0ca\uff0cb \u7684\u5185\u5b58\u5730\u5740\u59cb\u7ec8\u4e0d\u53d8\u3002\u7531\u4e8e\u6709\u8fd9\u4e2a\u7279\u6027\uff0cfor \u5faa\u73af\u91cc\u9762\u5982\u679c\u5f00\u534f\u7a0b\uff0c\u4e0d\u8981\u76f4\u63a5\u628a a \u6216\u8005 b \u7684\u5730\u5740\u4f20\u7ed9\u534f\u7a0b\u3002\u89e3\u51b3\u529e\u6cd5\uff1a\u5728\u6bcf\u6b21\u5faa\u73af\u65f6\uff0c\u521b\u5efa\u4e00\u4e2a\u4e34\u65f6\u53d8\u91cf\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>4\u3001go defer\uff0c\u591a\u4e2a defer \u7684\u987a\u5e8f\uff0cdefer \u5728\u4ec0\u4e48\u65f6\u673a\u4f1a\u4fee\u6539\u8fd4\u56de\u503c\uff1f<\/strong><\/h3>\n\n\n\n<p>\u4f5c\u7528\uff1adefer\u5ef6\u8fdf\u51fd\u6570\uff0c\u91ca\u653e\u8d44\u6e90\uff0c\u6536\u5c3e\u5de5\u4f5c\uff1b\u5982\u91ca\u653e\u9501\uff0c\u5173\u95ed\u6587\u4ef6\uff0c\u5173\u95ed\u94fe\u63a5\uff1b\u6355\u83b7panic;<\/p>\n\n\n\n<p>\u907f\u5751\u6307\u5357\uff1adefer\u51fd\u6570\u7d27\u8ddf\u5728\u8d44\u6e90\u6253\u5f00\u540e\u9762\uff0c\u5426\u5219defer\u53ef\u80fd\u5f97\u4e0d\u5230\u6267\u884c\uff0c\u5bfc\u81f4\u5185\u5b58\u6cc4\u9732\u3002<\/p>\n\n\n\n<p>\u591a\u4e2a defer \u8c03\u7528\u987a\u5e8f\u662f LIFO\uff08\u540e\u5165\u5148\u51fa\uff09\uff0cdefer\u540e\u7684\u64cd\u4f5c\u53ef\u4ee5\u7406\u89e3\u4e3a\u538b\u5165\u6808\u4e2d<\/p>\n\n\n\n<p>defer\uff0creturn\uff0creturn value\uff08\u51fd\u6570\u8fd4\u56de\u503c\uff09 \u6267\u884c\u987a\u5e8f\uff1a\u9996\u5148return\uff0c\u5176\u6b21return value\uff0c\u6700\u540edefer\u3002defer\u53ef\u4ee5\u4fee\u6539\u51fd\u6570\u6700\u7ec8\u8fd4\u56de\u503c\uff0c\u4fee\u6539\u65f6\u673a\uff1a<strong>\u6709\u540d\u8fd4\u56de\u503c\u6216\u8005\u51fd\u6570\u8fd4\u56de\u6307\u9488<\/strong>&nbsp;\u53c2\u8003\uff1a<a href=\"https:\/\/link.zhihu.com\/?target=https%3A\/\/blog.csdn.net\/Cassie_zkq\/article\/details\/108567205\" target=\"_blank\" rel=\"noreferrer noopener\">\u3010Golang\u3011Go\u8bed\u8a00defer\u7528\u6cd5\u5927\u603b\u7ed3(\u542breturn\u8fd4\u56de\u673a\u5236)__\u5976\u916a\u7684\u535a\u5ba2-CSDN\u535a\u5ba2<\/a><\/p>\n\n\n\n<p><strong>\u6709\u540d\u8fd4\u56de\u503c<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>func b() (i int) {\n\tdefer func() {\n\t\ti++\n\t\tfmt.Println(\"defer2:\", i)\n\t}()\n\tdefer func() {\n\t\ti++\n\t\tfmt.Println(\"defer1:\", i)\n\t}()\n\treturn i <em>\/\/\u6216\u8005\u76f4\u63a5\u5199\u6210return\n<\/em><em><\/em>}\nfunc main() {\n\tfmt.Println(\"return:\", b())\n}\n<\/code><\/pre>\n\n\n\n<p><strong>\u51fd\u6570\u8fd4\u56de\u6307\u9488<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>func c() *int {\n\tvar i int\n\tdefer func() {\n\t\ti++\n\t\tfmt.Println(\"defer2:\", i)\n\t}()\n\tdefer func() {\n\t\ti++\n\t\tfmt.Println(\"defer1:\", i)\n\t}()\n\treturn &amp;i\n}\nfunc main() {\n\tfmt.Println(\"return:\", *(c()))\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>5\u3001uint \u7c7b\u578b\u6ea2\u51fa\u95ee\u9898<\/strong><\/h3>\n\n\n\n<p>\u8d85\u8fc7\u6700\u5927\u5b58\u50a8\u503c\u5982uint8\u6700\u5927\u662f255<\/p>\n\n\n\n<p>var a uint8 =255<\/p>\n\n\n\n<p>var b uint8 =1<\/p>\n\n\n\n<p>a+b = 0\u603b\u4e4b\u7c7b\u578b\u6ea2\u51fa\u4f1a\u51fa\u73b0\u96be\u4ee5\u610f\u6599\u7684\u4e8b<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic2.zhimg.com\/v2-5bf5e213ce315a16d0b7e65ef41cc685_1440w.webp?consumer=ZHI_MENG\" alt=\"\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>6\u3001\u80fd\u4ecb\u7ecd\u4e0b rune \u7c7b\u578b\u5417\uff1f<\/strong><\/h3>\n\n\n\n<p>\u76f8\u5f53int32<\/p>\n\n\n\n<p>golang\u4e2d\u7684\u5b57\u7b26\u4e32\u5e95\u5c42\u5b9e\u73b0\u662f\u901a\u8fc7byte\u6570\u7ec4\u7684\uff0c\u4e2d\u6587\u5b57\u7b26\u5728unicode\u4e0b\u53602\u4e2a\u5b57\u8282\uff0c\u5728utf-8\u7f16\u7801\u4e0b\u53603\u4e2a\u5b57\u8282\uff0c\u800cgolang\u9ed8\u8ba4\u7f16\u7801\u6b63\u597d\u662futf-8<\/p>\n\n\n\n<p>byte \u7b49\u540c\u4e8eint8\uff0c\u5e38\u7528\u6765\u5904\u7406ascii\u5b57\u7b26<\/p>\n\n\n\n<p>rune \u7b49\u540c\u4e8eint32,\u5e38\u7528\u6765\u5904\u7406unicode\u6216utf-8\u5b57\u7b26<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic2.zhimg.com\/v2-15a9656d176cfcc16d4116bbc9d2a24d_1440w.webp?consumer=ZHI_MENG\" alt=\"\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>7\u3001 golang \u4e2d\u89e3\u6790 tag \u662f\u600e\u4e48\u5b9e\u73b0\u7684\uff1f\u53cd\u5c04\u539f\u7406\u662f\u4ec0\u4e48\uff1f(\u4e2d\u9ad8\u7ea7\u80af\u5b9a\u4f1a\u95ee\uff0c\u6bd4\u8f83\u96be\uff0c\u9700\u8981\u81ea\u5df1\u591a\u53bb\u603b\u7ed3)<\/strong><\/h3>\n\n\n\n<p><strong>\u53c2\u8003\u5982\u4e0b\u8fde\u63a5<\/strong><a href=\"https:\/\/link.zhihu.com\/?target=https%3A\/\/blog.csdn.net\/paladinosment\/article\/details\/42570937\" target=\"_blank\" rel=\"noreferrer noopener\">golang\u4e2dstruct\u5173\u4e8e\u53cd\u5c04tag_paladinosment\u7684\u535a\u5ba2-CSDN\u535a\u5ba2_golang \u53cd\u5c04tag<\/a><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>type User struct {\n\tname string `json:name-field`\n\tage  int\n}\nfunc main() {\n\tuser := &amp;User{\"John Doe The Fourth\", 20}\n\n\tfield, ok := reflect.TypeOf(user).Elem().FieldByName(\"name\")\n\tif !ok {\n\t\tpanic(\"Field not found\")\n\t}\n\tfmt.Println(getStructTag(field))\n}\n\nfunc getStructTag(f reflect.StructField) string {\n\treturn string(f.Tag)\n}<\/code><\/pre>\n\n\n\n<p>Go \u4e2d\u89e3\u6790\u7684 tag \u662f\u901a\u8fc7\u53cd\u5c04\u5b9e\u73b0\u7684\uff0c\u53cd\u5c04\u662f\u6307\u8ba1\u7b97\u673a\u7a0b\u5e8f\u5728\u8fd0\u884c\u65f6\uff08Run time\uff09\u53ef\u4ee5\u8bbf\u95ee\u3001\u68c0\u6d4b\u548c\u4fee\u6539\u5b83\u672c\u8eab\u72b6\u6001\u6216\u884c\u4e3a\u7684\u4e00\u79cd\u80fd\u529b\u6216\u52a8\u6001\u77e5\u9053\u7ed9\u5b9a\u6570\u636e\u5bf9\u8c61\u7684\u7c7b\u578b\u548c\u7ed3\u6784\uff0c\u5e76\u6709\u673a\u4f1a\u4fee\u6539\u5b83\u3002\u53cd\u5c04\u5c06\u63a5\u53e3\u53d8\u91cf\u8f6c\u6362\u6210\u53cd\u5c04\u5bf9\u8c61 Type \u548c Value\uff1b\u53cd\u5c04\u53ef\u4ee5\u901a\u8fc7\u53cd\u5c04\u5bf9\u8c61 Value \u8fd8\u539f\u6210\u539f\u5148\u7684\u63a5\u53e3\u53d8\u91cf\uff1b\u53cd\u5c04\u53ef\u4ee5\u7528\u6765\u4fee\u6539\u4e00\u4e2a\u53d8\u91cf\u7684\u503c\uff0c\u524d\u63d0\u662f\u8fd9\u4e2a\u503c\u53ef\u4ee5\u88ab\u4fee\u6539\uff1btag\u662f\u5565:\u7ed3\u6784\u4f53\u652f\u6301\u6807\u8bb0\uff0cname string `json:name-field` \u5c31\u662f `json:name-field` \u8fd9\u90e8\u5206<\/p>\n\n\n\n<p><strong>gorm json yaml gRPC protobuf gin.Bind()\u90fd\u662f\u901a\u8fc7\u53cd\u5c04\u6765\u5b9e\u73b0\u7684<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>8\u3001\u8c03\u7528\u51fd\u6570\u4f20\u5165\u7ed3\u6784\u4f53\u65f6\uff0c\u5e94\u8be5\u4f20\u503c\u8fd8\u662f\u6307\u9488\uff1f \uff08Golang \u90fd\u662f\u4f20\u503c\uff09<\/strong><\/h3>\n\n\n\n<p>Go \u7684\u51fd\u6570\u53c2\u6570\u4f20\u9012\u90fd\u662f\u503c\u4f20\u9012\u3002\u6240\u8c13\u503c\u4f20\u9012\uff1a\u6307\u5728\u8c03\u7528\u51fd\u6570\u65f6\u5c06\u5b9e\u9645\u53c2\u6570\u590d\u5236\u4e00\u4efd\u4f20\u9012\u5230\u51fd\u6570\u4e2d\uff0c\u8fd9\u6837\u5728\u51fd\u6570\u4e2d\u5982\u679c\u5bf9\u53c2\u6570\u8fdb\u884c\u4fee\u6539\uff0c\u5c06\u4e0d\u4f1a\u5f71\u54cd\u5230\u5b9e\u9645\u53c2\u6570\u3002\u53c2\u6570\u4f20\u9012\u8fd8\u6709\u5f15\u7528\u4f20\u9012\uff0c\u6240\u8c13\u5f15\u7528\u4f20\u9012\u662f\u6307\u5728\u8c03\u7528\u51fd\u6570\u65f6\u5c06\u5b9e\u9645\u53c2\u6570\u7684\u5730\u5740\u4f20\u9012\u5230\u51fd\u6570\u4e2d\uff0c\u90a3\u4e48\u5728\u51fd\u6570\u4e2d\u5bf9\u53c2\u6570\u6240\u8fdb\u884c\u7684\u4fee\u6539\uff0c\u5c06\u5f71\u54cd\u5230\u5b9e\u9645\u53c2\u6570<\/p>\n\n\n\n<p>\u56e0\u4e3a Go \u91cc\u9762\u7684 map\uff0cslice\uff0cchan \u662f\u5f15\u7528\u7c7b\u578b\u3002\u53d8\u91cf\u533a\u5206\u503c\u7c7b\u578b\u548c\u5f15\u7528\u7c7b\u578b\u3002\u6240\u8c13\u503c\u7c7b\u578b\uff1a\u53d8\u91cf\u548c\u53d8\u91cf\u7684\u503c\u5b58\u5728\u540c\u4e00\u4e2a\u4f4d\u7f6e\u3002\u6240\u8c13\u5f15\u7528\u7c7b\u578b\uff1a\u53d8\u91cf\u548c\u53d8\u91cf\u7684\u503c\u662f\u4e0d\u540c\u7684\u4f4d\u7f6e\uff0c\u53d8\u91cf\u7684\u503c\u5b58\u50a8\u7684\u662f\u5bf9\u503c\u7684\u5f15\u7528\u3002\u4f46\u5e76\u4e0d\u662f map\uff0cslice\uff0cchan \u7684\u6240\u6709\u7684\u53d8\u91cf\u5728\u51fd\u6570\u5185\u90fd\u80fd\u88ab\u4fee\u6539\uff0c\u4e0d\u540c\u6570\u636e\u7c7b\u578b\u7684\u5e95\u5c42\u5b58\u50a8\u7ed3\u6784\u548c\u5b9e\u73b0\u53ef\u80fd\u4e0d\u592a\u4e00\u6837\uff0c\u60c5\u51b5\u4e5f\u5c31\u4e0d\u4e00\u6837\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>9\u3001\u8bb2\u8bb2 Go \u7684 slice \u5e95\u5c42\u6570\u636e\u7ed3\u6784\u548c\u4e00\u4e9b\u7279\u6027\uff1f<\/strong><\/h3>\n\n\n\n<p>\u7b54\uff1aGo \u7684 slice \u5e95\u5c42\u6570\u636e\u7ed3\u6784\u662f\u7531\u4e00\u4e2a array \u6307\u9488\u6307\u5411\u5e95\u5c42\u6570\u7ec4\uff0clen \u8868\u793a\u5207\u7247\u957f\u5ea6\uff0ccap \u8868\u793a\u5207\u7247\u5bb9\u91cf\u3002slice \u7684\u4e3b\u8981\u5b9e\u73b0\u662f\u6269\u5bb9\u3002\u5bf9\u4e8e append \u5411 slice \u6dfb\u52a0\u5143\u7d20\u65f6\uff0c\u5047\u5982 slice \u5bb9\u91cf\u591f\u7528\uff0c\u5219\u8ffd\u52a0\u65b0\u5143\u7d20\u8fdb\u53bb\uff0cslice.len++\uff0c\u8fd4\u56de\u539f\u6765\u7684 slice\u3002\u5f53\u539f\u5bb9\u91cf\u4e0d\u591f\uff0c\u5219 slice \u5148\u6269\u5bb9\uff0c\u6269\u5bb9\u4e4b\u540e slice \u5f97\u5230\u65b0\u7684 slice\uff0c\u5c06\u5143\u7d20\u8ffd\u52a0\u8fdb\u65b0\u7684 slice\uff0cslice.len++\uff0c\u8fd4\u56de\u65b0\u7684 slice\u3002\u5bf9\u4e8e\u5207\u7247\u7684\u6269\u5bb9\u89c4\u5219\uff1a\u5f53\u5207\u7247\u6bd4\u8f83\u5c0f\u65f6\uff08\u5bb9\u91cf\u5c0f\u4e8e 1024\uff09\uff0c\u5219\u91c7\u7528\u8f83\u5927\u7684\u6269\u5bb9\u500d\u901f\u8fdb\u884c\u6269\u5bb9\uff08\u65b0\u7684\u6269\u5bb9\u4f1a\u662f\u539f\u6765\u7684 2 \u500d\uff09\uff0c\u907f\u514d\u9891\u7e41\u6269\u5bb9\uff0c\u4ece\u800c\u51cf\u5c11\u5185\u5b58\u5206\u914d\u7684\u6b21\u6570\u548c\u6570\u636e\u62f7\u8d1d\u7684\u4ee3\u4ef7\u3002\u5f53\u5207\u7247\u8f83\u5927\u7684\u65f6\uff08\u539f\u6765\u7684 slice \u7684\u5bb9\u91cf\u5927\u4e8e\u6216\u8005\u7b49\u4e8e 1024\uff09\uff0c\u91c7\u7528\u8f83\u5c0f\u7684\u6269\u5bb9\u500d\u901f\uff08\u65b0\u7684\u6269\u5bb9\u5c06\u6269\u5927\u5927\u4e8e\u6216\u8005\u7b49\u4e8e\u539f\u6765 1.25 \u500d\uff09\uff0c\u4e3b\u8981\u907f\u514d\u7a7a\u95f4\u6d6a\u8d39\uff0c\u7f51\u4e0a\u5176\u5b9e\u5f88\u591a\u603b\u7ed3\u7684\u662f 1.25 \u500d\uff0c\u90a3\u662f\u5728\u4e0d\u8003\u8651\u5185\u5b58\u5bf9\u9f50\u7684\u60c5\u51b5\u4e0b\uff0c\u5b9e\u9645\u4e0a\u8fd8\u8981\u8003\u8651\u5185\u5b58\u5bf9\u9f50\uff0c\u6269\u5bb9\u662f\u5927\u4e8e\u6216\u8005\u7b49\u4e8e 1.25 \u500d\u3002<\/p>\n\n\n\n<p>\uff08\u5173\u4e8e\u521a\u624d\u95ee\u7684 slice \u4e3a\u4ec0\u4e48\u4f20\u5230\u51fd\u6570\u5185\u53ef\u80fd\u88ab\u4fee\u6539\uff0c\u5982\u679c slice \u5728\u51fd\u6570\u5185\u6ca1\u6709\u51fa\u73b0\u6269\u5bb9\uff0c\u51fd\u6570\u5916\u548c\u51fd\u6570\u5185 slice \u53d8\u91cf\u6307\u5411\u662f\u540c\u4e00\u4e2a\u6570\u7ec4\uff0c\u5219\u51fd\u6570\u5185\u590d\u5236\u7684 slice \u53d8\u91cf\u503c\u51fa\u73b0\u66f4\u6539\uff0c\u51fd\u6570\u5916\u8fd9\u4e2a slice \u53d8\u91cf\u503c\u4e5f\u4f1a\u88ab\u4fee\u6539\u3002\u5982\u679c slice \u5728\u51fd\u6570\u5185\u51fa\u73b0\u6269\u5bb9\uff0c\u5219\u51fd\u6570\u5185\u53d8\u91cf\u7684\u503c\u4f1a\u65b0\u751f\u6210\u4e00\u4e2a\u6570\u7ec4\uff08\u4e5f\u5c31\u662f\u65b0\u7684 slice\uff0c\u800c\u51fd\u6570\u5916\u7684 slice \u6307\u5411\u7684\u8fd8\u662f\u539f\u6765\u7684 slice\uff0c\u5219\u51fd\u6570\u5185\u7684\u4fee\u6539\u4e0d\u4f1a\u5f71\u54cd\u51fd\u6570\u5916\u7684 slice\u3002\uff09<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>10\u3001\u8bb2\u8bb2 Go \u7684 select \u5e95\u5c42\u6570\u636e\u7ed3\u6784\u548c\u4e00\u4e9b\u7279\u6027\uff1f\uff08\u96be\u70b9\uff0c\u6ca1\u6709\u9879\u76ee\u7ecf\u5e38\u53ef\u80fd\u8bf4\u4e0d\u6e05\uff0c\u9762\u8bd5\u4e00\u822c\u4f1a\u95ee\u4f60\u9879\u76ee\u4e2d\u600e\u4e48\u4f7f\u7528select\uff09<\/strong><\/h3>\n\n\n\n<p>\u7b54\uff1ago \u7684 select \u4e3a golang \u63d0\u4f9b\u4e86\u591a\u8def IO \u590d\u7528\u673a\u5236\uff0c\u548c\u5176\u4ed6 IO \u590d\u7528\u4e00\u6837\uff0c\u7528\u4e8e\u68c0\u6d4b\u662f\u5426\u6709\u8bfb\u5199\u4e8b\u4ef6\u662f\u5426 ready\u3002linux \u7684\u7cfb\u7edf IO \u6a21\u578b\u6709 select\uff0cpoll\uff0cepoll\uff0cgo \u7684 select \u548c linux \u7cfb\u7edf select \u975e\u5e38\u76f8\u4f3c\u3002<\/p>\n\n\n\n<p>select \u7ed3\u6784\u7ec4\u6210\u4e3b\u8981\u662f\u7531 case \u8bed\u53e5\u548c\u6267\u884c\u7684\u51fd\u6570\u7ec4\u6210 select \u5b9e\u73b0\u7684\u591a\u8def\u590d\u7528\u662f\uff1a\u6bcf\u4e2a\u7ebf\u7a0b\u6216\u8005\u8fdb\u7a0b\u90fd\u5148\u5230\u6ce8\u518c\u548c\u63a5\u53d7\u7684 channel\uff08\u88c5\u7f6e\uff09\u6ce8\u518c\uff0c\u7136\u540e\u963b\u585e\uff0c\u7136\u540e\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u5728\u8fd0\u8f93\uff0c\u5f53\u6ce8\u518c\u7684\u7ebf\u7a0b\u548c\u8fdb\u7a0b\u51c6\u5907\u597d\u6570\u636e\u540e\uff0c\u88c5\u7f6e\u4f1a\u6839\u636e\u6ce8\u518c\u7684\u4fe1\u606f\u5f97\u5230\u76f8\u5e94\u7684\u6570\u636e\u3002<\/p>\n\n\n\n<p><strong>select \u7684\u7279\u6027<\/strong><\/p>\n\n\n\n<p>1\uff09select \u64cd\u4f5c\u81f3\u5c11\u8981\u6709\u4e00\u4e2a case \u8bed\u53e5\uff0c\u51fa\u73b0\u8bfb\u5199 nil \u7684 channel \u8be5\u5206\u652f\u4f1a\u5ffd\u7565\uff0c\u5728 nil \u7684 channel \u4e0a\u64cd\u4f5c\u5219\u4f1a\u62a5\u9519\u3002<\/p>\n\n\n\n<p>2\uff09select \u4ec5\u652f\u6301\u7ba1\u9053\uff0c\u800c\u4e14\u662f\u5355\u534f\u7a0b\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p>3\uff09\u6bcf\u4e2a case \u8bed\u53e5\u4ec5\u80fd\u5904\u7406\u4e00\u4e2a\u7ba1\u9053\uff0c\u8981\u4e48\u8bfb\u8981\u4e48\u5199\u3002<\/p>\n\n\n\n<p>4\uff09\u591a\u4e2a case \u8bed\u53e5\u7684\u6267\u884c\u987a\u5e8f\u662f\u968f\u673a\u7684\u3002<\/p>\n\n\n\n<p>5\uff09\u5b58\u5728 default \u8bed\u53e5\uff0cselect \u5c06\u4e0d\u4f1a\u963b\u585e\uff0c\u4f46\u662f\u5b58\u5728 default \u4f1a\u5f71\u54cd\u6027\u80fd\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>11\u3001\u8bb2\u8bb2 Go \u7684 defer \u5e95\u5c42\u6570\u636e\u7ed3\u6784\u548c\u4e00\u4e9b\u7279\u6027\uff1f<\/strong><\/h3>\n\n\n\n<p>\u7b54\uff1a\u6bcf\u4e2a defer \u8bed\u53e5\u90fd\u5bf9\u5e94\u4e00\u4e2a_defer \u5b9e\u4f8b\uff0c\u591a\u4e2a\u5b9e\u4f8b\u4f7f\u7528\u6307\u9488\u8fde\u63a5\u8d77\u6765\u5f62\u6210\u4e00\u4e2a\u5355\u8fde\u8868\uff0c\u4fdd\u5b58\u5728 gotoutine \u6570\u636e\u7ed3\u6784\u4e2d\uff0c\u6bcf\u6b21\u63d2\u5165_defer \u5b9e\u4f8b\uff0c\u5747\u63d2\u5165\u5230\u94fe\u8868\u7684\u5934\u90e8\uff0c\u51fd\u6570\u7ed3\u675f\u518d\u4e00\u6b21\u4ece\u5934\u90e8\u53d6\u51fa\uff0c\u4ece\u800c\u5f62\u6210\u540e\u8fdb\u5148\u51fa\u7684\u6548\u679c\u3002<\/p>\n\n\n\n<p><strong>defer \u7684\u89c4\u5219\u603b\u7ed3<\/strong>\uff1a<\/p>\n\n\n\n<p>\u5ef6\u8fdf\u51fd\u6570\u7684\u53c2\u6570\u662f defer \u8bed\u53e5\u51fa\u73b0\u7684\u65f6\u5019\u5c31\u5df2\u7ecf\u786e\u5b9a\u4e86\u7684\u3002<\/p>\n\n\n\n<p>\u5ef6\u8fdf\u51fd\u6570\u6267\u884c\u6309\u7167\u540e\u8fdb\u5148\u51fa\u7684\u987a\u5e8f\u6267\u884c\uff0c\u5373\u5148\u51fa\u73b0\u7684 defer \u6700\u540e\u6267\u884c\u3002<\/p>\n\n\n\n<p>\u5ef6\u8fdf\u51fd\u6570\u53ef\u80fd\u64cd\u4f5c\u4e3b\u51fd\u6570\u7684\u8fd4\u56de\u503c\u3002<\/p>\n\n\n\n<p>\u7533\u8bf7\u8d44\u6e90\u540e\u7acb\u5373\u4f7f\u7528 defer \u5173\u95ed\u8d44\u6e90\u662f\u4e2a\u597d\u4e60\u60ef\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>12\u3001\u5355\u5f15\u53f7\uff0c\u53cc\u5f15\u53f7\uff0c\u53cd\u5f15\u53f7\u7684\u533a\u522b\uff1f<\/strong><\/h3>\n\n\n\n<p>\u5355\u5f15\u53f7\uff0c\u8868\u793abyte\u7c7b\u578b\u6216rune\u7c7b\u578b\uff0c\u5bf9\u5e94 uint8\u548cint32\u7c7b\u578b\uff0c\u9ed8\u8ba4\u662f rune \u7c7b\u578b\u3002byte\u7528\u6765\u5f3a\u8c03\u6570\u636e\u662fraw data\uff0c\u800c\u4e0d\u662f\u6570\u5b57\uff1b\u800crune\u7528\u6765\u8868\u793aUnicode\u7684code point\u3002<\/p>\n\n\n\n<p>\u53cc\u5f15\u53f7\uff0c\u624d\u662f\u5b57\u7b26\u4e32\uff0c\u5b9e\u9645\u4e0a\u662f\u5b57\u7b26\u6570\u7ec4\u3002\u53ef\u4ee5\u7528\u7d22\u5f15\u53f7\u8bbf\u95ee\u67d0\u5b57\u8282\uff0c\u4e5f\u53ef\u4ee5\u7528len()\u51fd\u6570\u6765\u83b7\u53d6\u5b57\u7b26\u4e32\u6240\u5360\u7684\u5b57\u8282\u957f\u5ea6\u3002<\/p>\n\n\n\n<p>\u53cd\u5f15\u53f7\uff0c\u8868\u793a\u5b57\u7b26\u4e32\u5b57\u9762\u91cf\uff0c\u4f46\u4e0d\u652f\u6301\u4efb\u4f55\u8f6c\u4e49\u5e8f\u5217\u3002\u5b57\u9762\u91cf raw literal string \u7684\u610f\u601d\u662f\uff0c\u4f60\u5b9a\u4e49\u65f6\u5199\u7684\u5565\u6837\uff0c\u5b83\u5c31\u5565\u6837\uff0c\u4f60\u6709\u6362\u884c\uff0c\u5b83\u5c31\u6362\u884c\u3002\u4f60\u5199\u8f6c\u4e49\u5b57\u7b26\uff0c\u5b83\u4e5f\u5c31\u5c55\u793a\u8f6c\u4e49\u5b57\u7b26\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e8c\u3001map\u76f8\u5173<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1\u3001map \u4f7f\u7528\u6ce8\u610f\u7684\u70b9\uff0c\u662f\u5426\u5e76\u53d1\u5b89\u5168\uff1f<\/h3>\n\n\n\n<p>map\u7684\u7c7b\u578b\u662fmap[key]\uff0ckey\u7c7b\u578b\u7684ke\u5fc5\u987b\u662f\u53ef\u6bd4\u8f83\u7684\uff0c\u901a\u5e38\u60c5\u51b5\uff0c\u4f1a\u9009\u62e9\u5185\u5efa\u7684\u57fa\u672c\u7c7b\u578b\uff0c\u6bd4\u5982\u6574\u6570\u3001\u5b57\u7b26\u4e32\u505akey\u7684\u7c7b\u578b\u3002\u5982\u679c\u8981\u4f7f\u7528struct\u4f5c\u4e3akey\uff0c\u8981\u4fdd\u8bc1struct\u5bf9\u8c61\u5728\u903b\u8f91\u4e0a\u662f\u4e0d\u53ef\u53d8\u7684\u3002\u5728Go\u8bed\u8a00\u4e2d\uff0cmap[key]\u51fd\u6570\u8fd4\u56de\u7ed3\u679c\u53ef\u4ee5\u662f\u4e00\u4e2a\u503c\uff0c\u4e5f\u53ef\u4ee5\u662f\u4e24\u4e2a\u503c\u3002map\u662f\u65e0\u5e8f\u7684\uff0c\u5982\u679c\u6211\u4eec\u60f3\u8981\u4fdd\u8bc1\u904d\u5386map\u65f6\u5143\u7d20\u6709\u5e8f\uff0c\u53ef\u4ee5\u4f7f\u7528\u8f85\u52a9\u7684\u6570\u636e\u7ed3\u6784\uff0c\u4f8b\u5982orderedmap\u3002<\/p>\n\n\n\n<p><strong>\u7b2c\u4e00\uff0c<\/strong>\u4e00\u5b9a\u8981\u5148\u521d\u59cb\u5316\uff0c\u5426\u5219panic<\/p>\n\n\n\n<p><strong>\u7b2c\u4e8c\uff0c<\/strong>map\u7c7b\u578b\u662f\u5bb9\u6613\u53d1\u751f\u5e76\u53d1\u8bbf\u95ee\u95ee\u9898\u7684\u3002\u4e0d\u6ce8\u610f\u5c31\u5bb9\u6613\u53d1\u751f\u7a0b\u5e8f\u8fd0\u884c\u65f6\u5e76\u53d1\u8bfb\u5199\u5bfc\u81f4\u7684panic\u3002 Go\u8bed\u8a00\u5185\u5efa\u7684map\u5bf9\u8c61\u4e0d\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\uff0c\u5e76\u53d1\u8bfb\u5199\u7684\u65f6\u5019\u8fd0\u884c\u65f6\u4f1a\u6709\u68c0\u67e5\uff0c\u9047\u5230\u5e76\u53d1\u95ee\u9898\u5c31\u4f1a\u5bfc\u81f4panic\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2\u3001map \u5faa\u73af\u662f\u6709\u5e8f\u7684\u8fd8\u662f\u65e0\u5e8f\u7684\uff1f<\/h3>\n\n\n\n<p>\u65e0\u5e8f\u7684, map \u56e0\u6269\u5f20\u2f7d\u91cd\u65b0\u54c8\u5e0c\u65f6\uff0c\u5404\u952e\u503c\u9879\u5b58\u50a8\u4f4d\u7f6e\u90fd\u53ef\u80fd\u4f1a\u53d1\u751f\u6539\u53d8\uff0c\u987a\u5e8f\u81ea\u7136\u4e5f\u6ca1\u6cd5\u4fdd\u8bc1\u4e86\uff0c\u6240\u4ee5\u5b98\u65b9\u907f\u514d\u5927\u5bb6\u4f9d\u8d56\u987a\u5e8f\uff0c\u76f4\u63a5\u6253\u4e71\u5904\u7406\u3002\u5c31\u662f for range map \u5728\u5f00\u59cb\u5904\u7406\u5faa\u73af\u903b\u8f91\u7684\u65f6\u5019\uff0c\u5c31\u505a\u4e86\u968f\u673a\u64ad\u79cd<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3\u3001 map \u4e2d\u5220\u9664\u4e00\u4e2a key\uff0c\u5b83\u7684\u5185\u5b58\u4f1a\u91ca\u653e\u4e48\uff1f\uff08\u5e38\u95ee\uff09<\/h3>\n\n\n\n<p>\u5982\u679c\u5220\u9664\u7684\u5143\u7d20\u662f\u503c\u7c7b\u578b\uff0c\u5982int\uff0cfloat\uff0cbool\uff0cstring\u4ee5\u53ca\u6570\u7ec4\u548cstruct\uff0cmap\u7684\u5185\u5b58\u4e0d\u4f1a\u81ea\u52a8\u91ca\u653e<\/p>\n\n\n\n<p>\u5982\u679c\u5220\u9664\u7684\u5143\u7d20\u662f\u5f15\u7528\u7c7b\u578b\uff0c\u5982\u6307\u9488\uff0cslice\uff0cmap\uff0cchan\u7b49\uff0cmap\u7684\u5185\u5b58\u4f1a\u81ea\u52a8\u91ca\u653e\uff0c\u4f46\u91ca\u653e\u7684\u5185\u5b58\u662f\u5b50\u5143\u7d20\u5e94\u7528\u7c7b\u578b\u7684\u5185\u5b58\u5360\u7528<\/p>\n\n\n\n<p>\u5c06map\u8bbe\u7f6e\u4e3anil\u540e\uff0c\u5185\u5b58\u88ab\u56de\u6536\u3002<\/p>\n\n\n\n<p><strong>\u8fd9\u4e2a\u95ee\u9898\u8fd8\u9700\u8981\u5927\u5bb6\u53bb\u641c\u7d22\u4e0b\u7b54\u6848\uff0c\u6211\u8bb0\u5f97\u6709\u4e0d\u4e00\u6837\u7684\u8bf4\u6cd5\uff0c\u8c28\u614e\u91c7\u7528\u672c\u9898\u7b54\u6848\u3002<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4\u3001\u600e\u4e48\u5904\u7406\u5bf9 map \u8fdb\u884c\u5e76\u53d1\u8bbf\u95ee\uff1f\u6709\u6ca1\u6709\u5176\u4ed6\u65b9\u6848\uff1f \u533a\u522b\u662f\u4ec0\u4e48\uff1f<\/h3>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/picx.zhimg.com\/v2-1107961e741b834eb5fc071ff68da831_1440w.webp?consumer=ZHI_MENG\" alt=\"\"\/><\/figure>\n\n\n\n<p><strong>\u65b9\u5f0f\u4e00\u3001\u4f7f\u7528\u5185\u7f6esync.Map\uff0c\u8be6\u7ec6\u53c2\u8003<\/strong><a href=\"https:\/\/link.zhihu.com\/?target=https%3A\/\/mbd.baidu.com\/ma\/s\/7Hwd9yMc\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/mbd.baidu.com\/ma\/s\/7Hwd9yMc<\/a><\/p>\n\n\n\n<p><strong>\u65b9\u5f0f\u4e8c\u3001\u4f7f\u7528\u8bfb\u5199\u9501\u5b9e\u73b0\u5e76\u53d1\u5b89\u5168map<\/strong><a href=\"https:\/\/link.zhihu.com\/?target=https%3A\/\/mbd.baidu.com\/ma\/s\/qO7b0VQU\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/mbd.baidu.com\/ma\/s\/qO7b0VQU<\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5\u3001 nil map \u548c\u7a7a map \u6709\u4f55\u4e0d\u540c\uff1f<\/h3>\n\n\n\n<p>1\uff09\u53ef\u4ee5\u5bf9\u672a\u521d\u59cb\u5316\u7684map\u8fdb\u884c\u53d6\u503c\uff0c\u4f46\u53d6\u51fa\u6765\u7684\u4e1c\u897f\u662f\u7a7a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><code>var m1 map&#91;string]string\nfmt.Println(m1&#91;\"1\"])<\/code><\/code><\/pre>\n\n\n\n<p>\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/<\/p>\n\n\n\n<p>2\uff09\u4e0d\u80fd\u5bf9\u672a\u521d\u59cb\u5316\u7684map\u8fdb\u884c\u8d4b\u503c\uff0c\u8fd9\u6837\u5c06\u4f1a\u629b\u51fa\u4e00\u4e2a\u5f02\u5e38\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><code>var m1 map&#91;string]string\nm1&#91;\"1\"] = \"1\"\npanic: assignment to entry in nil map<\/code><\/code><\/pre>\n\n\n\n<p>3) \u901a\u8fc7fmt\u6253\u5370map\u65f6\uff0c\u7a7amap\u548cnil map\u7ed3\u679c\u662f\u4e00\u6837\u7684\uff0c\u90fd\u4e3amap[]\u3002\u6240\u4ee5\uff0c\u8fd9\u4e2a\u65f6\u5019\u522b\u65ad\u5b9amap\u662f\u7a7a\u8fd8\u662fnil\uff0c\u800c\u5e94\u8be5\u901a\u8fc7map == nil\u6765\u5224\u65ad\u3002<\/p>\n\n\n\n<p><strong>nil map \u672a\u521d\u59cb\u5316\uff0c\u7a7amap\u662f\u957f\u5ea6\u4e3a\u7a7a<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6\u3001map \u7684\u6570\u636e\u7ed3\u6784\u662f\u4ec0\u4e48\uff1f\u662f\u600e\u4e48\u5b9e\u73b0\u6269\u5bb9\uff1f<\/h3>\n\n\n\n<p>\u7b54\uff1agolang \u4e2d map \u662f\u4e00\u4e2a kv \u5bf9\u96c6\u5408\u3002\u5e95\u5c42\u4f7f\u7528 hash table\uff0c\u7528\u94fe\u8868\u6765\u89e3\u51b3\u51b2\u7a81 \uff0c\u51fa\u73b0\u51b2\u7a81\u65f6\uff0c\u4e0d\u662f\u6bcf\u4e00\u4e2a key \u90fd\u7533\u8bf7\u4e00\u4e2a\u7ed3\u6784\u901a\u8fc7\u94fe\u8868\u4e32\u8d77\u6765\uff0c\u800c\u662f\u4ee5 bmap \u4e3a\u6700\u5c0f\u7c92\u5ea6\u6302\u8f7d\uff0c\u4e00\u4e2a bmap \u53ef\u4ee5\u653e 8 \u4e2a kv\u3002\u5728\u54c8\u5e0c\u51fd\u6570\u7684\u9009\u62e9\u4e0a\uff0c\u4f1a\u5728\u7a0b\u5e8f\u542f\u52a8\u65f6\uff0c\u68c0\u6d4b cpu \u662f\u5426\u652f\u6301 aes\uff0c\u5982\u679c\u652f\u6301\uff0c\u5219\u4f7f\u7528 aes hash\uff0c\u5426\u5219\u4f7f\u7528 memhash\u3002\u6bcf\u4e2a map \u7684\u5e95\u5c42\u7ed3\u6784\u662f hmap\uff0c\u662f\u6709\u82e5\u5e72\u4e2a\u7ed3\u6784\u4e3a bmap \u7684 bucket \u7ec4\u6210\u7684\u6570\u7ec4\u3002\u6bcf\u4e2a bucket \u5e95\u5c42\u90fd\u91c7\u7528\u94fe\u8868\u7ed3\u6784\u3002<\/p>\n\n\n\n<p><strong>hmap \u7684\u7ed3\u6784\u5982\u4e0b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>type hmap struct {\n    count     int                  \/\/ \u5143\u7d20\u4e2a\u6570\n    flags     uint8\n    B         uint8                \/\/ \u6269\u5bb9\u5e38\u91cf\u76f8\u5173\u5b57\u6bb5B\u662fbuckets\u6570\u7ec4\u7684\u957f\u5ea6\u7684\u5bf9\u6570 2^B\n    noverflow uint16               \/\/ \u6ea2\u51fa\u7684bucket\u4e2a\u6570\n    hash0     uint32               \/\/ hash seed\n    buckets    unsafe.Pointer      \/\/ buckets \u6570\u7ec4\u6307\u9488\n    oldbuckets unsafe.Pointer      \/\/ \u7ed3\u6784\u6269\u5bb9\u7684\u65f6\u5019\u7528\u4e8e\u8d4b\u503c\u7684buckets\u6570\u7ec4\n    nevacuate  uintptr             \/\/ \u642c\u8fc1\u8fdb\u5ea6\n    extra *mapextra                \/\/ \u7528\u4e8e\u6269\u5bb9\u7684\u6307\u9488\n}<\/code><\/pre>\n\n\n\n<p><strong>map \u7684\u5bb9\u91cf\u5927\u5c0f<\/strong><\/p>\n\n\n\n<p><br>\u5e95\u5c42\u8c03\u7528 makemap \u51fd\u6570\uff0c\u8ba1\u7b97\u5f97\u5230\u5408\u9002\u7684 B\uff0cmap \u5bb9\u91cf\u6700\u591a\u53ef\u5bb9\u7eb3 6.52^B \u4e2a\u5143\u7d20\uff0c6.5 \u4e3a\u88c5\u8f7d\u56e0\u5b50\u9608\u503c\u5e38\u91cf\u3002\u88c5\u8f7d\u56e0\u5b50\u7684\u8ba1\u7b97\u516c\u5f0f\u662f\uff1a\u88c5\u8f7d\u56e0\u5b50=\u586b\u5165\u8868\u4e2d\u7684\u5143\u7d20\u4e2a\u6570\/\u6563\u5217\u8868\u7684\u957f\u5ea6\uff0c\u88c5\u8f7d\u56e0\u5b50\u8d8a\u5927\uff0c\u8bf4\u660e\u7a7a\u95f2\u4f4d\u7f6e\u8d8a\u5c11\uff0c\u51b2\u7a81\u8d8a\u591a\uff0c\u6563\u5217\u8868\u7684\u6027\u80fd\u4f1a\u4e0b\u964d\u3002\u5e95\u5c42\u8c03\u7528 makemap \u51fd\u6570\uff0c\u8ba1\u7b97\u5f97\u5230\u5408\u9002\u7684 B\uff0cmap \u5bb9\u91cf\u6700\u591a\u53ef\u5bb9\u7eb3 6.52^B \u4e2a\u5143\u7d20\uff0c6.5 \u4e3a\u88c5\u8f7d\u56e0\u5b50\u9608\u503c\u5e38\u91cf\u3002\u88c5\u8f7d\u56e0\u5b50\u7684\u8ba1\u7b97\u516c\u5f0f\u662f\uff1a\u88c5\u8f7d\u56e0\u5b50=\u586b\u5165\u8868\u4e2d\u7684\u5143\u7d20\u4e2a\u6570\/\u6563\u5217\u8868\u7684\u957f\u5ea6\uff0c\u88c5\u8f7d\u56e0\u5b50\u8d8a\u5927\uff0c\u8bf4\u660e\u7a7a\u95f2\u4f4d\u7f6e\u8d8a\u5c11\uff0c\u51b2\u7a81\u8d8a\u591a\uff0c\u6563\u5217\u8868\u7684\u6027\u80fd\u4f1a\u4e0b\u964d\u3002<\/p>\n\n\n\n<p><strong>\u89e6\u53d1 map \u6269\u5bb9\u7684\u6761\u4ef6<\/strong><\/p>\n\n\n\n<p>1\uff09\u88c5\u8f7d\u56e0\u5b50\u8d85\u8fc7\u9608\u503c\uff0c\u6e90\u7801\u91cc\u5b9a\u4e49\u7684\u9608\u503c\u662f 6.5\u3002<\/p>\n\n\n\n<p>2\uff09overflow \u7684 bucket \u6570\u91cf\u8fc7\u591a map \u7684 bucket \u5b9a\u4f4d\u548c key \u7684\u5b9a\u4f4d\u9ad8\u516b\u4f4d\u7528\u4e8e\u5b9a\u4f4d bucket\uff0c\u4f4e\u516b\u4f4d\u7528\u4e8e\u5b9a\u4f4d key\uff0c\u5feb\u901f\u8bd5\u9519\u540e\u518d\u8fdb\u884c\u5b8c\u6574\u5bf9\u6bd4<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/picx.zhimg.com\/v2-f99ed061ef6ea995743cda6d332861e3_1440w.webp?consumer=ZHI_MENG\" alt=\"\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">7\u3001slices\u80fd\u4f5c\u4e3amap\u7c7b\u578b\u7684key\u5417\uff1f<\/h3>\n\n\n\n<p>\u5f53\u65f6\u88ab\u95ee\u7684\u4e00\u8138\u61f5\u903c\uff0c\u5176\u5b9e\u662f\u8fd9\u4e2a\u95ee\u9898\u7684\u53d8\u79cd\uff1agolang \u54ea\u4e9b\u7c7b\u578b\u53ef\u4ee5\u4f5c\u4e3amap key\uff1f<\/p>\n\n\n\n<p>\u7b54\u6848\u662f\uff1a<strong>\u5728golang\u89c4\u8303\u4e2d\uff0c\u53ef\u6bd4\u8f83\u7684\u7c7b\u578b\u90fd\u53ef\u4ee5\u4f5c\u4e3amap key\uff1b<\/strong>\u8fd9\u4e2a\u95ee\u9898\u53c8\u5ef6\u4f38\u5230\u5728\uff1agolang\u89c4\u8303\u4e2d\uff0c\u54ea\u4e9b\u6570\u636e\u7c7b\u578b\u53ef\u4ee5\u6bd4\u8f83\uff1f<\/p>\n\n\n\n<p><strong>\u4e0d\u80fd\u4f5c\u4e3amap key \u7684\u7c7b\u578b\u5305\u62ec\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>slices<\/li>\n\n\n\n<li>maps<\/li>\n\n\n\n<li>functions<\/li>\n<\/ul>\n\n\n\n<p>\u8be6\u7ec6\u53c2\u8003\uff1a<a href=\"https:\/\/link.zhihu.com\/?target=https%3A\/\/blog.csdn.net\/lanyang123456\/article\/details\/123765745\" target=\"_blank\" rel=\"noreferrer noopener\">golang \u54ea\u4e9b\u7c7b\u578b\u53ef\u4ee5\u4f5c\u4e3amap key<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09<strong>\u3001context\u76f8\u5173<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1\u3001context \u7ed3\u6784\u662f\u4ec0\u4e48\u6837\u7684\uff1fcontext \u4f7f\u7528\u573a\u666f\u548c\u7528\u9014\uff1f<\/strong><\/h3>\n\n\n\n<p><strong>\uff08\u96be\uff0c\u4e5f\u5e38\u5e38\u95ee\u4f60\u9879\u76ee\u4e2d\u600e\u4e48\u7528\uff0c\u5149\u9760\u8bb0\u7b54\u6848\u5f88\u96be\u8ba9\u9762\u8bd5\u5b98\u6ee1\u610f\uff0c\u53cd\u6b63\u6709\u5404\u79cd\u7ed3\u5408\u5b9e\u9645\u7684\u95ee\u9898\uff09<\/strong><\/p>\n\n\n\n<p><strong>\u53c2\u8003\u94fe\u63a5\uff1a<\/strong><a href=\"https:\/\/link.zhihu.com\/?target=https%3A\/\/www.cnblogs.com\/juanmaofeifei\/p\/14439957.html\" target=\"_blank\" rel=\"noreferrer noopener\">go context\u8be6\u89e3 &#8211; \u5377\u6bdb\u72d2\u72d2 &#8211; \u535a\u5ba2\u56ed<\/a><\/p>\n\n\n\n<p>\u7b54\uff1aGo \u7684 Context \u7684\u6570\u636e\u7ed3\u6784\u5305\u542b Deadline\uff0cDone\uff0cErr\uff0cValue\uff0cDeadline \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a time.Time\uff0c\u8868\u793a\u5f53\u524d Context \u5e94\u8be5\u7ed3\u675f\u7684\u65f6\u95f4\uff0cok \u5219\u8868\u793a\u6709\u7ed3\u675f\u65f6\u95f4\uff0cDone \u65b9\u6cd5\u5f53 Context \u88ab\u53d6\u6d88\u6216\u8005\u8d85\u65f6\u65f6\u5019\u8fd4\u56de\u7684\u4e00\u4e2a close \u7684 channel\uff0c\u544a\u8bc9\u7ed9 context \u76f8\u5173\u7684\u51fd\u6570\u8981\u505c\u6b62\u5f53\u524d\u5de5\u4f5c\u7136\u540e\u8fd4\u56de\u4e86\uff0cErr \u8868\u793a context \u88ab\u53d6\u6d88\u7684\u539f\u56e0\uff0cValue \u65b9\u6cd5\u8868\u793a context \u5b9e\u73b0\u5171\u4eab\u6570\u636e\u5b58\u50a8\u7684\u5730\u65b9\uff0c\u662f\u534f\u7a0b\u5b89\u5168\u7684\u3002context \u5728\u4e1a\u52a1\u4e2d\u662f\u7ecf\u5e38\u88ab\u4f7f\u7528\u7684\uff0c<\/p>\n\n\n\n<p><strong>\u5176\u4e3b\u8981\u7684\u5e94\u7528 \uff1a<\/strong><\/p>\n\n\n\n<p>1\uff1a\u4e0a\u4e0b\u6587\u63a7\u5236\uff0c2\uff1a\u591a\u4e2a goroutine \u4e4b\u95f4\u7684\u6570\u636e\u4ea4\u4e92\u7b49\uff0c3\uff1a\u8d85\u65f6\u63a7\u5236\uff1a\u5230\u67d0\u4e2a\u65f6\u95f4\u70b9\u8d85\u65f6\uff0c\u8fc7\u591a\u4e45\u8d85\u65f6\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u56db\u3001channel\u76f8\u5173<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1\u3001channel \u662f\u5426\u7ebf\u7a0b\u5b89\u5168\uff1f\u9501\u7528\u5728\u4ec0\u4e48\u5730\u65b9\uff1f<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic4.zhimg.com\/v2-e287f5861392d5de73d8956974acdbbd_1440w.webp?consumer=ZHI_MENG\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u5c31\u7740\u56fe\u7247\u91cc\u9762\u7684\u7b54\u6848\u770b\u770b\u5427\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2\u3001go channel \u7684\u5e95\u5c42\u5b9e\u73b0\u539f\u7406 \uff08\u6570\u636e\u7ed3\u6784\uff09<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic4.zhimg.com\/v2-9452c08ff058590cea1b40a39fd8c70f_1440w.webp?consumer=ZHI_MENG\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u5e95\u5c42\u7ed3\u6784\u9700\u8981\u63cf\u8ff0\u51fa\u6765\uff0c\u8fd9\u4e2a\u7b80\u5355\uff0cbuf\uff0c\u53d1\u9001\u961f\u5217\uff0c\u63a5\u6536\u961f\u5217\uff0clock\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3\u3001nil\u3001\u5173\u95ed\u7684 channel\u3001\u6709\u6570\u636e\u7684 channel\uff0c\u518d\u8fdb\u884c\u8bfb\u3001\u5199\u3001\u5173\u95ed\u4f1a\u600e\u4e48\u6837\uff1f\uff08\u5404\u7c7b\u53d8\u79cd\u9898\u578b\uff0c\u91cd\u8981\uff09<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic1.zhimg.com\/v2-8e12b7eb664280346ec96bcc4fe1db2c_1440w.webp?consumer=ZHI_MENG\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u8fd8\u8981\u53bb\u4e86\u89e3\u4e00\u4e0b\u5355\u5411channel,\u5982\u53ea\u8bfb\u6216\u8005\u53ea\u5199\u901a\u9053\u5e38\u89c1\u7684\u5f02\u5e38\u95ee\u9898\uff0c\u8fd9\u5757\u8fd8\u9700\u8981\u5927\u5bb6\u81ea\u5df1\u603b\u7ed3\u603b\u7ed3\uff0c\u6709\u61c2\u5f97\u5927\u4f6c\u4e5f\u53ef\u4ee5\u8bc4\u8bba\u53d1\u9001\u7b54\u6848\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>4\u3001\u5411 channel \u53d1\u9001\u6570\u636e\u548c\u4ece channel \u8bfb\u6570\u636e\u7684\u6d41\u7a0b\u662f\u4ec0\u4e48\u6837\u7684\uff1f<\/strong><\/h3>\n\n\n\n<p><strong>\u53d1\u9001\u6d41\u7a0b\uff1a<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic2.zhimg.com\/v2-d2a3f2aa5c85b94df49430c21a53a2d9_1440w.webp?consumer=ZHI_MENG\" alt=\"\"\/><\/figure>\n\n\n\n<p><strong>\u63a5\u6536\u6d41\u7a0b\uff1a<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic3.zhimg.com\/v2-69e0e2f1409a17ec2987e4b63e6210da_1440w.webp?consumer=ZHI_MENG\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u8fd9\u4e2a\u6ca1\u5565\u597d\u8bf4\u7684\uff0c\u5e95\u5c42\u539f\u7406\uff0c1\u30012\u30013\u63cf\u8ff0\u51fa\u6765\uff0c\u4fdd\u8bc1\u9762\u8bd5\u5b98\u6ee1\u610f\u3002\u5177\u4f53\u7684\u6587\u5b57\u63cf\u8ff0\u4e0b\u9762\u4e00\u9898\u6709\uff0cchannel\u7684\u6982\u5ff5\u591a\u4e14\u590d\u6742\uff0c\u8111\u6d77\u4e2d\u6709\u4e2a\u603b\u5206\u7684\u6982\u5ff5\uff0c\u5426\u5219\u4f60\u8bf4\u7684\u518d\u591a\uff0c\u9762\u8bd5\u5b98\u4e5f\u6293\u4e0d\u4f4f\u4f60\u8bf4\u7684\u91cd\u70b9\uff0c\u7b49\u4e8e\u767d\u8bf4\u3002\u95ee\u98985\u5df2\u7ecf\u4e3a\u5927\u5bb6\u603b\u7ed3\u597d\u4e86\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>5\u3001\u8bb2\u8bb2 Go \u7684 chan \u5e95\u5c42\u6570\u636e\u7ed3\u6784\u548c\u4e3b\u8981\u4f7f\u7528\u573a\u666f<\/strong><\/h3>\n\n\n\n<p>\u7b54\uff1achannel \u7684\u6570\u636e\u7ed3\u6784\u5305\u542b qccount \u5f53\u524d\u961f\u5217\u4e2d\u5269\u4f59\u5143\u7d20\u4e2a\u6570\uff0cdataqsiz \u73af\u5f62\u961f\u5217\u957f\u5ea6\uff0c\u5373\u53ef\u4ee5\u5b58\u653e\u7684\u5143\u7d20\u4e2a\u6570\uff0cbuf \u73af\u5f62\u961f\u5217\u6307\u9488\uff0celemsize \u6bcf\u4e2a\u5143\u7d20\u7684\u5927\u5c0f\uff0cclosed \u6807\u8bc6\u5173\u95ed\u72b6\u6001\uff0celemtype \u5143\u7d20\u7c7b\u578b\uff0csendx \u961f\u5217\u4e0b\u8868\uff0c\u6307\u793a\u5143\u7d20\u5199\u5165\u65f6\u5b58\u653e\u5230\u961f\u5217\u4e2d\u7684\u4f4d\u7f6e\uff0crecv \u961f\u5217\u4e0b\u8868\uff0c\u6307\u793a\u5143\u7d20\u4ece\u961f\u5217\u7684\u8be5\u4f4d\u7f6e\u8bfb\u51fa\u3002recvq \u7b49\u5f85\u8bfb\u6d88\u606f\u7684 goroutine \u961f\u5217\uff0csendq \u7b49\u5f85\u5199\u6d88\u606f\u7684 goroutine \u961f\u5217\uff0clock \u4e92\u65a5\u9501\uff0cchan \u4e0d\u5141\u8bb8\u5e76\u53d1\u8bfb\u5199\u3002<\/p>\n\n\n\n<p><strong>\u65e0\u7f13\u51b2\u548c\u6709\u7f13\u51b2\u533a\u522b\uff1a<\/strong>&nbsp;\u7ba1\u9053\u6ca1\u6709\u7f13\u51b2\u533a\uff0c\u4ece\u7ba1\u9053\u8bfb\u6570\u636e\u4f1a\u963b\u585e\uff0c\u76f4\u5230\u6709\u534f\u7a0b\u5411\u7ba1\u9053\u4e2d\u5199\u5165\u6570\u636e\u3002\u540c\u6837\uff0c\u5411\u7ba1\u9053\u5199\u5165\u6570\u636e\u4e5f\u4f1a\u963b\u585e\uff0c\u76f4\u5230\u6709\u534f\u7a0b\u4ece\u7ba1\u9053\u8bfb\u53d6\u6570\u636e\u3002\u7ba1\u9053\u6709\u7f13\u51b2\u533a\u4f46\u7f13\u51b2\u533a\u6ca1\u6709\u6570\u636e\uff0c\u4ece\u7ba1\u9053\u8bfb\u53d6\u6570\u636e\u4e5f\u4f1a\u963b\u585e\uff0c\u76f4\u5230\u534f\u7a0b\u5199\u5165\u6570\u636e\uff0c\u5982\u679c\u7ba1\u9053\u6ee1\u4e86\uff0c\u5199\u6570\u636e\u4e5f\u4f1a\u963b\u585e\uff0c\u76f4\u5230\u534f\u7a0b\u4ece\u7f13\u51b2\u533a\u8bfb\u53d6\u6570\u636e\u3002<\/p>\n\n\n\n<p><strong>channel \u7684\u4e00\u4e9b\u7279\u70b9<\/strong>&nbsp;1\uff09\u3001\u8bfb\u5199\u503c nil \u7ba1\u9053\u4f1a\u6c38\u4e45\u963b\u585e 2\uff09\u3001\u5173\u95ed\u7684\u7ba1\u9053\u8bfb\u6570\u636e\u4ecd\u7136\u53ef\u4ee5\u8bfb\u6570\u636e 3\uff09\u3001\u5f80\u5173\u95ed\u7684\u7ba1\u9053\u5199\u6570\u636e\u4f1a panic 4\uff09\u3001\u5173\u95ed\u4e3a nil \u7684\u7ba1\u9053 panic 5\uff09\u3001\u5173\u95ed\u5df2\u7ecf\u5173\u95ed\u7684\u7ba1\u9053 panic<\/p>\n\n\n\n<p><strong>\u5411 channel \u5199\u6570\u636e\u7684\u6d41\u7a0b\uff1a<\/strong>&nbsp;\u5982\u679c\u7b49\u5f85\u63a5\u6536\u961f\u5217 recvq \u4e0d\u4e3a\u7a7a\uff0c\u8bf4\u660e\u7f13\u51b2\u533a\u4e2d\u6ca1\u6709\u6570\u636e\u6216\u8005\u6ca1\u6709\u7f13\u51b2\u533a\uff0c\u6b64\u65f6\u76f4\u63a5\u4ece recvq \u53d6\u51fa G,\u5e76\u628a\u6570\u636e\u5199\u5165\uff0c\u6700\u540e\u628a\u8be5 G \u5524\u9192\uff0c\u7ed3\u675f\u53d1\u9001\u8fc7\u7a0b\uff1b \u5982\u679c\u7f13\u51b2\u533a\u4e2d\u6709\u7a7a\u4f59\u4f4d\u7f6e\uff0c\u5c06\u6570\u636e\u5199\u5165\u7f13\u51b2\u533a\uff0c\u7ed3\u675f\u53d1\u9001\u8fc7\u7a0b\uff1b \u5982\u679c\u7f13\u51b2\u533a\u4e2d\u6ca1\u6709\u7a7a\u4f59\u4f4d\u7f6e\uff0c\u5c06\u5f85\u53d1\u9001\u6570\u636e\u5199\u5165 G\uff0c\u5c06\u5f53\u524d G \u52a0\u5165 sendq\uff0c\u8fdb\u5165\u7761\u7720\uff0c\u7b49\u5f85\u88ab\u8bfb goroutine \u5524\u9192\uff1b<\/p>\n\n\n\n<p><strong>\u5411 channel \u8bfb\u6570\u636e\u7684\u6d41\u7a0b\uff1a<\/strong>&nbsp;\u5982\u679c\u7b49\u5f85\u53d1\u9001\u961f\u5217 sendq \u4e0d\u4e3a\u7a7a\uff0c\u4e14\u6ca1\u6709\u7f13\u51b2\u533a\uff0c\u76f4\u63a5\u4ece sendq \u4e2d\u53d6\u51fa G\uff0c\u628a G \u4e2d\u6570\u636e\u8bfb\u51fa\uff0c\u6700\u540e\u628a G \u5524\u9192\uff0c\u7ed3\u675f\u8bfb\u53d6\u8fc7\u7a0b\uff1b \u5982\u679c\u7b49\u5f85\u53d1\u9001\u961f\u5217 sendq \u4e0d\u4e3a\u7a7a\uff0c\u6b64\u65f6\u8bf4\u660e\u7f13\u51b2\u533a\u5df2\u6ee1\uff0c\u4ece\u7f13\u51b2\u533a\u4e2d\u9996\u90e8\u8bfb\u51fa\u6570\u636e\uff0c\u628a G \u4e2d\u6570\u636e\u5199\u5165\u7f13\u51b2\u533a\u5c3e\u90e8\uff0c\u628a G \u5524\u9192\uff0c\u7ed3\u675f\u8bfb\u53d6\u8fc7\u7a0b\uff1b \u5982\u679c\u7f13\u51b2\u533a\u4e2d\u6709\u6570\u636e\uff0c\u5219\u4ece\u7f13\u51b2\u533a\u53d6\u51fa\u6570\u636e\uff0c\u7ed3\u675f\u8bfb\u53d6\u8fc7\u7a0b\uff1b\u5c06\u5f53\u524d goroutine \u52a0\u5165 recvq\uff0c\u8fdb\u5165\u7761\u7720\uff0c\u7b49\u5f85\u88ab\u5199 goroutine \u5524\u9192\uff1b<\/p>\n\n\n\n<p><strong>\u4f7f\u7528\u573a\u666f\uff1a<\/strong>&nbsp;\u6d88\u606f\u4f20\u9012\u3001\u6d88\u606f\u8fc7\u6ee4\uff0c\u4fe1\u53f7\u5e7f\u64ad\uff0c\u4e8b\u4ef6\u8ba2\u9605\u4e0e\u5e7f\u64ad\uff0c\u8bf7\u6c42\u3001\u54cd\u5e94\u8f6c\u53d1\uff0c\u4efb\u52a1\u5206\u53d1\uff0c\u7ed3\u679c\u6c47\u603b\uff0c\u5e76\u53d1\u63a7\u5236\uff0c\u9650\u6d41\uff0c\u540c\u6b65\u4e0e\u5f02\u6b65<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e94\u3001GMP\u76f8\u5173<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1\u3001\u4ec0\u4e48\u662f GMP\uff1f\uff08\u5fc5\u95ee\uff09<\/h3>\n\n\n\n<p>\u7b54\uff1aG \u4ee3\u8868\u7740 goroutine\uff0cP \u4ee3\u8868\u7740\u4e0a\u4e0b\u6587\u5904\u7406\u5668\uff0cM \u4ee3\u8868 thread \u7ebf\u7a0b\uff0c\u5728 GPM \u6a21\u578b\uff0c\u6709\u4e00\u4e2a\u5168\u5c40\u961f\u5217\uff08Global Queue\uff09\uff1a\u5b58\u653e\u7b49\u5f85\u8fd0\u884c\u7684 G\uff0c\u8fd8\u6709\u4e00\u4e2a P \u7684\u672c\u5730\u961f\u5217\uff1a\u4e5f\u662f\u5b58\u653e\u7b49\u5f85\u8fd0\u884c\u7684 G\uff0c\u4f46\u6570\u91cf\u6709\u9650\uff0c\u4e0d\u8d85\u8fc7 256 \u4e2a\u3002GPM \u7684\u8c03\u5ea6\u6d41\u7a0b\u4ece go func()\u5f00\u59cb\u521b\u5efa\u4e00\u4e2a goroutine\uff0c\u65b0\u5efa\u7684 goroutine \u4f18\u5148\u4fdd\u5b58\u5728 P \u7684\u672c\u5730\u961f\u5217\u4e2d\uff0c\u5982\u679c P \u7684\u672c\u5730\u961f\u5217\u5df2\u7ecf\u6ee1\u4e86\uff0c\u5219\u4f1a\u4fdd\u5b58\u5230\u5168\u5c40\u961f\u5217\u4e2d\u3002M \u4f1a\u4ece P \u7684\u961f\u5217\u4e2d\u53d6\u4e00\u4e2a\u53ef\u6267\u884c\u72b6\u6001\u7684 G \u6765\u6267\u884c\uff0c\u5982\u679c P \u7684\u672c\u5730\u961f\u5217\u4e3a\u7a7a\uff0c\u5c31\u4f1a\u4ece\u5176\u4ed6\u7684 MP \u7ec4\u5408\u5077\u53d6\u4e00\u4e2a\u53ef\u6267\u884c\u7684 G \u6765\u6267\u884c\uff0c\u5f53 M \u6267\u884c\u67d0\u4e00\u4e2a G \u65f6\u5019\u53d1\u751f\u7cfb\u7edf\u8c03\u7528\u6216\u8005\u963b\u585e\uff0cM \u963b\u585e\uff0c\u5982\u679c\u8fd9\u4e2a\u65f6\u5019 G \u5728\u6267\u884c\uff0cruntime \u4f1a\u628a\u8fd9\u4e2a\u7ebf\u7a0b M \u4ece P \u4e2d\u6458\u9664\uff0c\u7136\u540e\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u64cd\u4f5c\u7cfb\u7edf\u7ebf\u7a0b\u6765\u670d\u52a1\u4e8e\u8fd9\u4e2a P\uff0c\u5f53 M \u7cfb\u7edf\u8c03\u7528\u7ed3\u675f\u65f6\uff0c\u8fd9\u4e2a G \u4f1a\u5c1d\u8bd5\u83b7\u53d6\u4e00\u4e2a\u7a7a\u95f2\u7684 P \u6765\u6267\u884c\uff0c\u5e76\u653e\u5165\u5230\u8fd9\u4e2a P \u7684\u672c\u5730\u961f\u5217\uff0c\u5982\u679c\u8fd9\u4e2a\u7ebf\u7a0b M \u53d8\u6210\u4f11\u7720\u72b6\u6001\uff0c\u52a0\u5165\u5230\u7a7a\u95f2\u7ebf\u7a0b\u4e2d\uff0c\u7136\u540e\u6574\u4e2a G \u5c31\u4f1a\u88ab\u653e\u5165\u5230\u5168\u5c40\u961f\u5217\u4e2d\u3002<\/p>\n\n\n\n<p>\u5173\u4e8e G,P,M \u7684\u4e2a\u6570\u95ee\u9898\uff0cG \u7684\u4e2a\u6570\u7406\u8bba\u4e0a\u662f\u65e0\u9650\u5236\u7684\uff0c\u4f46\u662f\u53d7\u5185\u5b58\u9650\u5236\uff0cP \u7684\u6570\u91cf\u4e00\u822c\u5efa\u8bae\u662f\u903b\u8f91 CPU \u6570\u91cf\u7684 2 \u500d\uff0cM \u7684\u6570\u636e\u9ed8\u8ba4\u542f\u52a8\u7684\u65f6\u5019\u662f 10000\uff0c\u5185\u6838\u5f88\u96be\u652f\u6301\u8fd9\u4e48\u591a\u7ebf\u7a0b\u6570\uff0c\u6240\u4ee5\u6574\u4e2a\u9650\u5236\u5ba2\u6237\u5ffd\u7565\uff0cM \u4e00\u822c\u4e0d\u505a\u8bbe\u7f6e\uff0c\u8bbe\u7f6e\u597d P\uff0cM \u4e00\u822c\u90fd\u662f\u8981\u5927\u4e8e P\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2\u3001\u8fdb\u7a0b\u3001\u7ebf\u7a0b\u3001\u534f\u7a0b\u6709\u4ec0\u4e48\u533a\u522b\uff1f\uff08\u5fc5\u95ee\uff09<\/h3>\n\n\n\n<p>\u8fdb\u7a0b\uff1a\u662f\u5e94\u7528\u7a0b\u5e8f\u7684\u542f\u52a8\u5b9e\u4f8b\uff0c\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u6709\u72ec\u7acb\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u4e0d\u540c\u7684\u8fdb\u7a0b\u901a\u8fc7\u8fdb\u7a0b\u95f4\u7684\u901a\u4fe1\u65b9\u5f0f\u6765\u901a\u4fe1\u3002<\/p>\n\n\n\n<p>\u7ebf\u7a0b\uff1a\u4ece\u5c5e\u4e8e\u8fdb\u7a0b\uff0c\u6bcf\u4e2a\u8fdb\u7a0b\u81f3\u5c11\u5305\u542b\u4e00\u4e2a\u7ebf\u7a0b\uff0c\u7ebf\u7a0b\u662f CPU \u8c03\u5ea6\u7684\u57fa\u672c\u5355\u4f4d\uff0c\u591a\u4e2a\u7ebf\u7a0b\u4e4b\u95f4\u53ef\u4ee5\u5171\u4eab\u8fdb\u7a0b\u7684\u8d44\u6e90\u5e76\u901a\u8fc7\u5171\u4eab\u5185\u5b58\u7b49\u7ebf\u7a0b\u95f4\u7684\u901a\u4fe1\u65b9\u5f0f\u6765\u901a\u4fe1\u3002<\/p>\n\n\n\n<p>\u534f\u7a0b\uff1a\u4e3a\u8f7b\u91cf\u7ea7\u7ebf\u7a0b\uff0c\u4e0e\u7ebf\u7a0b\u76f8\u6bd4\uff0c\u534f\u7a0b\u4e0d\u53d7\u64cd\u4f5c\u7cfb\u7edf\u7684\u8c03\u5ea6\uff0c\u534f\u7a0b\u7684\u8c03\u5ea6\u5668\u7531\u7528\u6237\u5e94\u7528\u7a0b\u5e8f\u63d0\u4f9b\uff0c\u534f\u7a0b\u8c03\u5ea6\u5668\u6309\u7167\u8c03\u5ea6\u7b56\u7565\u628a\u534f\u7a0b\u8c03\u5ea6\u5230\u7ebf\u7a0b\u4e2d\u8fd0\u884c<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3\u3001\u62a2\u5360\u5f0f\u8c03\u5ea6\u662f\u5982\u4f55\u62a2\u5360\u7684\uff1f<\/strong><\/h3>\n\n\n\n<p><strong>\u57fa\u4e8e\u534f\u4f5c\u5f0f\u62a2\u5360<\/strong><\/p>\n\n\n\n<p><strong>\u57fa\u4e8e\u4fe1\u53f7\u91cf\u62a2\u5360<\/strong><\/p>\n\n\n\n<p>\u5c31\u50cf\u64cd\u4f5c\u7cfb\u7edf\u8981\u8d1f\u8d23\u7ebf\u7a0b\u7684\u8c03\u5ea6\u4e00\u6837\uff0cGo\u7684runtime\u8981\u8d1f\u8d23goroutine\u7684\u8c03\u5ea6\u3002\u73b0\u4ee3\u64cd\u4f5c\u7cfb\u7edf\u8c03\u5ea6\u7ebf\u7a0b\u90fd\u662f\u62a2\u5360\u5f0f\u7684\uff0c\u6211\u4eec\u4e0d\u80fd\u4f9d\u8d56\u7528\u6237\u4ee3\u7801\u4e3b\u52a8\u8ba9\u51faCPU\uff0c\u6216\u8005\u56e0\u4e3aIO\u3001\u9501\u7b49\u5f85\u800c\u8ba9\u51fa\uff0c\u8fd9\u6837\u4f1a\u9020\u6210\u8c03\u5ea6\u7684\u4e0d\u516c\u5e73\u3002\u57fa\u4e8e\u7ecf\u5178\u7684\u65f6\u95f4\u7247\u7b97\u6cd5\uff0c\u5f53\u7ebf\u7a0b\u7684\u65f6\u95f4\u7247\u7528\u5b8c\u4e4b\u540e\uff0c\u4f1a\u88ab\u65f6\u949f\u4e2d\u65ad\u7ed9\u6253\u65ad\uff0c\u8c03\u5ea6\u5668\u4f1a\u5c06\u5f53\u524d\u7ebf\u7a0b\u7684\u6267\u884c\u4e0a\u4e0b\u6587\u8fdb\u884c\u4fdd\u5b58\uff0c\u7136\u540e\u6062\u590d\u4e0b\u4e00\u4e2a\u7ebf\u7a0b\u7684\u4e0a\u4e0b\u6587\uff0c\u5206\u914d\u65b0\u7684\u65f6\u95f4\u7247\u4ee4\u5176\u5f00\u59cb\u6267\u884c\u3002\u8fd9\u79cd\u62a2\u5360\u5bf9\u4e8e\u7ebf\u7a0b\u672c\u8eab\u662f\u65e0\u611f\u77e5\u7684\uff0c\u7cfb\u7edf\u5e95\u5c42\u652f\u6301\uff0c\u4e0d\u9700\u8981\u5f00\u53d1\u4eba\u5458\u7279\u6b8a\u5904\u7406\u3002<\/p>\n\n\n\n<p>\u57fa\u4e8e\u65f6\u95f4\u7247\u7684\u62a2\u5360\u5f0f\u8c03\u5ea6\u6709\u4e2a\u660e\u663e\u7684\u4f18\u70b9\uff0c\u80fd\u591f\u907f\u514dCPU\u8d44\u6e90\u6301\u7eed\u88ab\u5c11\u6570\u7ebf\u7a0b\u5360\u7528\uff0c\u4ece\u800c\u4f7f\u5176\u4ed6\u7ebf\u7a0b\u957f\u65f6\u95f4\u5904\u4e8e\u9965\u997f\u72b6\u6001\u3002goroutine\u7684\u8c03\u5ea6\u5668\u4e5f\u7528\u5230\u4e86\u65f6\u95f4\u7247\u7b97\u6cd5\uff0c\u4f46\u662f\u548c\u64cd\u4f5c\u7cfb\u7edf\u7684\u7ebf\u7a0b\u8c03\u5ea6\u8fd8\u662f\u6709\u4e9b\u533a\u522b\u7684\uff0c\u56e0\u4e3a\u6574\u4e2aGo\u7a0b\u5e8f\u90fd\u662f\u8fd0\u884c\u5728\u7528\u6237\u6001\u7684\uff0c\u6240\u4ee5\u4e0d\u80fd\u50cf\u64cd\u4f5c\u7cfb\u7edf\u90a3\u6837\u5229\u7528\u65f6\u949f\u4e2d\u65ad\u6765\u6253\u65ad\u8fd0\u884c\u4e2d\u7684goroutine\u3002\u4e5f\u5f97\u76ca\u4e8e\u5b8c\u5168\u5728\u7528\u6237\u6001\u5b9e\u73b0\uff0cgoroutine\u7684\u8c03\u5ea6\u5207\u6362\u66f4\u52a0\u8f7b\u91cf\u3002<\/p>\n\n\n\n<p><strong>\u4e0a\u9762\u8fd9\u4e24\u6bb5\u6587\u5b57\u53ea\u662f\u5bf9\u8c03\u5ea6\u7684\u4e00\u4e2a\u6982\u62ec\uff0c\u5177\u4f53\u7684\u534f\u4f5c\u5f0f\u8c03\u5ea6\u3001\u4fe1\u53f7\u91cf\u8c03\u5ea6\u5927\u5bb6\u8fd8\u9700\u8981\u53bb\u8be6\u7ec6\u4e86\u89e3\uff0c\u8fd9\u504f\u5e95\u5c42\u4e86\uff0c\u5927\u5382\u6216\u8005\u4e2d\u9ad8\u7ea7\u5f00\u53d1\u4f1a\u95ee\u3002\uff08\u5b57\u8282\u5c31\u95ee\u4e86\uff09<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4\u3001M \u548c P \u7684\u6570\u91cf\u95ee\u9898\uff1f<\/h3>\n\n\n\n<p>p\u9ed8\u8ba4cpu\u5185\u6838\u6570<\/p>\n\n\n\n<p>M\u4e0eP\u7684\u6570\u91cf\u6ca1\u6709\u7edd\u5bf9\u5173\u7cfb\uff0c\u4e00\u4e2aM\u963b\u585e\uff0cP\u5c31\u4f1a\u53bb\u521b\u5efa\u6216\u8005\u5207\u6362\u53e6\u4e00\u4e2aM\uff0c\u6240\u4ee5\uff0c\u5373\u4f7fP\u7684\u9ed8\u8ba4\u6570\u91cf\u662f1\uff0c\u4e5f\u6709\u53ef\u80fd\u4f1a\u521b\u5efa\u5f88\u591a\u4e2aM\u51fa\u6765<\/p>\n\n\n\n<p>\u3010Go\u8bed\u8a00\u8c03\u5ea6\u6a21\u578bG\u3001M\u3001P\u7684\u6570\u91cf\u591a\u5c11\u5408\u9002\uff1f\u3011<\/p>\n\n\n\n<p>\u8be6\u7ec6\u53c2\u8003\u8fd9\u7bc7\u6587\u7ae0<a href=\"https:\/\/link.zhihu.com\/?target=https%3A\/\/mbd.baidu.com\/ma\/s\/ZMOKQATr\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/mbd.baidu.com\/ma\/s\/ZMOKQATr<\/a><\/p>\n\n\n\n<p>GMP\u6570\u91cf\u8fd9\u4e00\u5757\uff0c\u7ed3\u8bba\u5f88\u597d\u8bb0\uff0c\u6ca1\u7528\u9879\u76ee\u7ecf\u9a8c\u7684\u8bdd\uff0c\u95ee\u4e86\u9879\u76ee\u4e2d\u600e\u4e48\u7528\u53ef\u80fd\u5bb9\u6613\u5361\u58f3\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u516d\u3001\u9501\u76f8\u5173<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1\u3001\u9664\u4e86 mutex \u4ee5\u5916\u8fd8\u6709\u90a3\u4e9b\u65b9\u5f0f\u5b89\u5168\u8bfb\u5199\u5171\u4eab\u53d8\u91cf\uff1f<\/h3>\n\n\n\n<p>* \u5c06\u5171\u4eab\u53d8\u91cf\u7684\u8bfb\u5199\u653e\u5230\u4e00\u4e2a goroutine \u4e2d\uff0c\u5176\u5b83 goroutine \u901a\u8fc7 channel \u8fdb\u884c\u8bfb\u5199\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p>* \u53ef\u4ee5\u7528\u4e2a\u6570\u4e3a 1 \u7684\u4fe1\u53f7\u91cf\uff08semaphore\uff09\u5b9e\u73b0\u4e92\u65a5<\/p>\n\n\n\n<p>* \u901a\u8fc7 Mutex \u9501\u5b9e\u73b0<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2\u3001Go \u5982\u4f55\u5b9e\u73b0\u539f\u5b50\u64cd\u4f5c\uff1f<\/h3>\n\n\n\n<p>\u7b54\uff1a\u539f\u5b50\u64cd\u4f5c\u5c31\u662f\u4e0d\u53ef\u4e2d\u65ad\u7684\u64cd\u4f5c\uff0c\u5916\u754c\u662f\u770b\u4e0d\u5230\u539f\u5b50\u64cd\u4f5c\u7684\u4e2d\u95f4\u72b6\u6001\uff0c\u8981\u4e48\u770b\u5230\u539f\u5b50\u64cd\u4f5c\u5df2\u7ecf\u5b8c\u6210\uff0c\u8981\u4e48\u770b\u5230\u539f\u5b50\u64cd\u4f5c\u5df2\u7ecf\u7ed3\u675f\u3002\u5728\u67d0\u4e2a\u503c\u7684\u539f\u5b50\u64cd\u4f5c\u6267\u884c\u7684\u8fc7\u7a0b\u4e2d\uff0cCPU \u7edd\u5bf9\u4e0d\u4f1a\u518d\u53bb\u6267\u884c\u5176\u4ed6\u9488\u5bf9\u8be5\u503c\u7684\u64cd\u4f5c\uff0c\u90a3\u4e48\u5176\u4ed6\u64cd\u4f5c\u4e5f\u662f\u539f\u5b50\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p>Go \u8bed\u8a00\u7684\u6807\u51c6\u5e93\u4ee3\u7801\u5305 sync\/atomic \u63d0\u4f9b\u4e86\u539f\u5b50\u7684\u8bfb\u53d6\uff08Load \u4e3a\u524d\u7f00\u7684\u51fd\u6570\uff09\u6216\u5199\u5165\uff08Store \u4e3a\u524d\u7f00\u7684\u51fd\u6570\uff09\u67d0\u4e2a\u503c\uff08\u8fd9\u91cc\u7ec6\u8282\u8fd8\u8981\u591a\u53bb\u67e5\u67e5\u8d44\u6599\uff09\u3002<\/p>\n\n\n\n<p><strong>\u539f\u5b50\u64cd\u4f5c\u4e0e\u4e92\u65a5\u9501\u7684\u533a\u522b<\/strong><\/p>\n\n\n\n<p>1\uff09\u3001\u4e92\u65a5\u9501\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u7528\u6765\u8ba9\u4e00\u4e2a\u7ebf\u7a0b\u6267\u884c\u7a0b\u5e8f\u7684\u5173\u952e\u90e8\u5206\uff0c\u5b8c\u6210\u4e92\u65a5\u7684\u591a\u4e2a\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p>2\uff09\u3001\u539f\u5b50\u64cd\u4f5c\u662f\u9488\u5bf9\u67d0\u4e2a\u503c\u7684\u5355\u4e2a\u4e92\u65a5\u64cd\u4f5c\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3\u3001Mutex \u662f\u60b2\u89c2\u9501\u8fd8\u662f\u4e50\u89c2\u9501\uff1f\u60b2\u89c2\u9501\u3001\u4e50\u89c2\u9501\u662f\u4ec0\u4e48\uff1f<\/h3>\n\n\n\n<p><strong>\u60b2\u89c2\u9501<\/strong><\/p>\n\n\n\n<p>\u60b2\u89c2\u9501\uff1a\u5f53\u8981\u5bf9\u6570\u636e\u5e93\u4e2d\u7684\u4e00\u6761\u6570\u636e\u8fdb\u884c\u4fee\u6539\u7684\u65f6\u5019\uff0c\u4e3a\u4e86\u907f\u514d\u540c\u65f6\u88ab\u5176\u4ed6\u4eba\u4fee\u6539\uff0c\u6700\u597d\u7684\u529e\u6cd5\u5c31\u662f\u76f4\u63a5\u5bf9\u8be5\u6570\u636e\u8fdb\u884c\u52a0\u9501\u4ee5\u9632\u6b62\u5e76\u53d1\u3002\u8fd9\u79cd\u501f\u52a9\u6570\u636e\u5e93\u9501\u673a\u5236\uff0c\u5728\u4fee\u6539\u6570\u636e\u4e4b\u524d\u5148\u9501\u5b9a\uff0c\u518d\u4fee\u6539\u7684\u65b9\u5f0f\u88ab\u79f0\u4e4b\u4e3a\u60b2\u89c2\u5e76\u53d1\u63a7\u5236\u3010Pessimistic Concurrency Control\uff0c\u7f29\u5199\u201cPCC\u201d\uff0c\u53c8\u540d\u201c\u60b2\u89c2\u9501\u201d\u3011\u3002<\/p>\n\n\n\n<p><strong>\u4e50\u89c2\u9501<\/strong><\/p>\n\n\n\n<p>\u4e50\u89c2\u9501\u662f\u76f8\u5bf9\u60b2\u89c2\u9501\u800c\u8a00\u7684\uff0c\u4e50\u89c2\u9501\u5047\u8bbe\u6570\u636e\u4e00\u822c\u60c5\u51b5\u4e0d\u4f1a\u9020\u6210\u51b2\u7a81\uff0c\u6240\u4ee5\u5728\u6570\u636e\u8fdb\u884c\u63d0\u4ea4\u66f4\u65b0\u7684\u65f6\u5019\uff0c\u624d\u4f1a\u6b63\u5f0f\u5bf9\u6570\u636e\u7684\u51b2\u7a81\u4e0e\u5426\u8fdb\u884c\u68c0\u6d4b\uff0c\u5982\u679c\u51b2\u7a81\uff0c\u5219\u8fd4\u56de\u7ed9\u7528\u6237\u5f02\u5e38\u4fe1\u606f\uff0c\u8ba9\u7528\u6237\u51b3\u5b9a\u5982\u4f55\u53bb\u505a\u3002\u4e50\u89c2\u9501\u9002\u7528\u4e8e\u8bfb\u591a\u5199\u5c11\u7684\u573a\u666f\uff0c\u8fd9\u6837\u53ef\u4ee5\u63d0\u9ad8\u7a0b\u5e8f\u7684\u541e\u5410\u91cf<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4\u3001Mutex \u6709\u51e0\u79cd\u6a21\u5f0f\uff1f<\/h3>\n\n\n\n<p><strong>1\uff09\u6b63\u5e38\u6a21\u5f0f<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5f53\u524d\u7684mutex\u53ea\u6709\u4e00\u4e2agoruntine\u6765\u83b7\u53d6\uff0c\u90a3\u4e48\u6ca1\u6709\u7ade\u4e89\uff0c\u76f4\u63a5\u8fd4\u56de\u3002<\/li>\n\n\n\n<li>\u65b0\u7684goruntine\u8fdb\u6765\uff0c\u5982\u679c\u5f53\u524dmutex\u5df2\u7ecf\u88ab\u83b7\u53d6\u4e86\uff0c\u5219\u8be5goruntine\u8fdb\u5165\u4e00\u4e2a\u5148\u5165\u5148\u51fa\u7684waiter\u961f\u5217\uff0c\u5728mutex\u88ab\u91ca\u653e\u540e\uff0cwaiter\u6309\u7167\u5148\u8fdb\u5148\u51fa\u7684\u65b9\u5f0f\u83b7\u53d6\u9501\u3002\u8be5goruntine\u4f1a\u5904\u4e8e\u81ea\u65cb\u72b6\u6001(\u4e0d\u6302\u8d77\uff0c\u7ee7\u7eed\u5360\u6709cpu)\u3002<\/li>\n\n\n\n<li>\u65b0\u7684goruntine\u8fdb\u6765\uff0cmutex\u5904\u4e8e\u7a7a\u95f2\u72b6\u6001\uff0c\u5c06\u53c2\u4e0e\u7ade\u4e89\u3002\u65b0\u6765\u7684 goroutine \u6709\u5148\u5929\u7684\u4f18\u52bf\uff0c\u5b83\u4eec\u6b63\u5728 CPU \u4e2d\u8fd0\u884c\uff0c\u53ef\u80fd\u5b83\u4eec\u7684\u6570\u91cf\u8fd8\u4e0d\u5c11\uff0c\u6240\u4ee5\uff0c\u5728\u9ad8\u5e76\u53d1\u60c5\u51b5\u4e0b\uff0c\u88ab\u5524\u9192\u7684 waiter \u53ef\u80fd\u6bd4\u8f83\u60b2\u5267\u5730\u83b7\u53d6\u4e0d\u5230\u9501\uff0c\u8fd9\u65f6\uff0c\u5b83\u4f1a\u88ab\u63d2\u5165\u5230\u961f\u5217\u7684\u524d\u9762\u3002\u5982\u679c waiter \u83b7\u53d6\u4e0d\u5230\u9501\u7684\u65f6\u95f4\u8d85\u8fc7\u9608\u503c 1 \u6beb\u79d2\uff0c\u90a3\u4e48\uff0c\u8fd9\u4e2a Mutex \u5c31\u8fdb\u5165\u5230\u4e86\u9965\u997f\u6a21\u5f0f\u3002<\/li>\n<\/ol>\n\n\n\n<p><strong>2\uff09\u9965\u997f\u6a21\u5f0f<\/strong><\/p>\n\n\n\n<p>\u5728\u9965\u997f\u6a21\u5f0f\u4e0b\uff0cMutex \u7684\u62e5\u6709\u8005\u5c06\u76f4\u63a5\u628a\u9501\u4ea4\u7ed9\u961f\u5217\u6700\u524d\u9762\u7684 waiter\u3002\u65b0\u6765\u7684 goroutine \u4e0d\u4f1a\u5c1d\u8bd5\u83b7\u53d6\u9501\uff0c\u5373\u4f7f\u770b\u8d77\u6765\u9501\u6ca1\u6709\u88ab\u6301\u6709\uff0c\u5b83\u4e5f\u4e0d\u4f1a\u53bb\u62a2\uff0c\u4e5f\u4e0d\u4f1a spin\uff08\u81ea\u65cb\uff09\uff0c\u5b83\u4f1a\u4e56\u4e56\u5730\u52a0\u5165\u5230\u7b49\u5f85\u961f\u5217\u7684\u5c3e\u90e8\u3002 \u5982\u679c\u62e5\u6709 Mutex \u7684 waiter \u53d1\u73b0\u4e0b\u9762\u4e24\u79cd\u60c5\u51b5\u7684\u5176\u4e2d\u4e4b\u4e00\uff0c\u5b83\u5c31\u4f1a\u628a\u8fd9\u4e2a Mutex \u8f6c\u6362\u6210\u6b63\u5e38\u6a21\u5f0f:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6b64 waiter \u5df2\u7ecf\u662f\u961f\u5217\u4e2d\u7684\u6700\u540e\u4e00\u4e2a waiter \u4e86\uff0c\u6ca1\u6709\u5176\u5b83\u7684\u7b49\u5f85\u9501\u7684 goroutine \u4e86\uff1b<\/li>\n\n\n\n<li>\u6b64 waiter \u7684\u7b49\u5f85\u65f6\u95f4\u5c0f\u4e8e 1 \u6beb\u79d2\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">5\u3001goroutine \u7684\u81ea\u65cb\u5360\u7528\u8d44\u6e90\u5982\u4f55\u89e3\u51b3<\/h3>\n\n\n\n<p>\u81ea\u65cb\u9501\u662f\u6307\u5f53\u4e00\u4e2a\u7ebf\u7a0b\u5728\u83b7\u53d6\u9501\u7684\u65f6\u5019\uff0c\u5982\u679c\u9501\u5df2\u7ecf\u88ab\u5176\u4ed6\u7ebf\u7a0b\u83b7\u53d6\uff0c\u90a3\u4e48\u8be5\u7ebf\u7a0b\u5c06\u5faa\u73af\u7b49\u5f85\uff0c\u7136\u540e\u4e0d\u65ad\u5730\u5224\u65ad\u662f\u5426\u80fd\u591f\u88ab\u6210\u529f\u83b7\u53d6\uff0c\u76f4\u5230\u83b7\u53d6\u5230\u9501\u624d\u4f1a\u9000\u51fa\u5faa\u73af\u3002<\/p>\n\n\n\n<p><strong>\u81ea\u65cb\u7684\u6761\u4ef6\u5982\u4e0b\uff1a<\/strong><\/p>\n\n\n\n<p>1\uff09\u8fd8\u6ca1\u81ea\u65cb\u8d85\u8fc7 4 \u6b21,<\/p>\n\n\n\n<p>2\uff09\u591a\u6838\u5904\u7406\u5668\uff0c<\/p>\n\n\n\n<p>3\uff09GOMAXPROCS &gt; 1\uff0c<\/p>\n\n\n\n<p>4\uff09p \u4e0a\u672c\u5730 goroutine \u961f\u5217\u4e3a\u7a7a\u3002<\/p>\n\n\n\n<p>mutex \u4f1a\u8ba9\u5f53\u524d\u7684 goroutine \u53bb\u7a7a\u8f6c CPU\uff0c\u5728\u7a7a\u8f6c\u5b8c\u540e\u518d\u6b21\u8c03\u7528 CAS \u65b9\u6cd5\u53bb\u5c1d\u8bd5\u6027\u7684\u5360\u6709\u9501\u8d44\u6e90\uff0c\u76f4\u5230\u4e0d\u6ee1\u8db3\u81ea\u65cb\u6761\u4ef6\uff0c\u5219\u6700\u7ec8\u4f1a\u52a0\u5165\u5230\u7b49\u5f85\u961f\u5217\u91cc\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e03\u3001\u5e76\u53d1\u76f8\u5173<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1\u3001\u600e\u4e48\u63a7\u5236\u5e76\u53d1\u6570\uff1f<\/h3>\n\n\n\n<p><strong>\u7b2c\u4e00\uff0c\u6709\u7f13\u51b2\u901a\u9053<\/strong><\/p>\n\n\n\n<p>\u6839\u636e\u901a\u9053\u4e2d\u6ca1\u6709\u6570\u636e\u65f6\u8bfb\u53d6\u64cd\u4f5c\u9677\u5165\u963b\u585e\u548c\u901a\u9053\u5df2\u6ee1\u65f6\u7ee7\u7eed\u5199\u5165\u64cd\u4f5c\u9677\u5165\u963b\u585e\u7684\u7279\u6027\uff0c\u6b63\u597d\u5b9e\u73b0\u63a7\u5236\u5e76\u53d1\u6570\u91cf\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>func main() {\n\tcount := 10 \/\/ \u6700\u5927\u652f\u6301\u5e76\u53d1\n\tsum := 100 \/\/ \u4efb\u52a1\u603b\u6570\n\twg := sync.WaitGroup{} \/\/\u63a7\u5236\u4e3b\u534f\u7a0b\u7b49\u5f85\u6240\u6709\u5b50\u534f\u7a0b\u6267\u884c\u5b8c\u4e4b\u540e\u518d\u9000\u51fa\u3002\n\n\tc := make(chan struct{}, count) \/\/ \u63a7\u5236\u4efb\u52a1\u5e76\u53d1\u7684chan\n\tdefer close(c)\n\n\tfor i:=0; i&lt;sum;i++{\n\t\twg.Add(1)\n\t\tc &lt;- struct{}{} \/\/ \u4f5c\u7528\u7c7b\u4f3c\u4e8ewaitgroup.Add(1)\n\t\tgo func(j int) {\n\t\t\tdefer wg.Done()\n\t\t\tfmt.Println(j)\n\t\t\t&lt;- c \/\/ \u6267\u884c\u5b8c\u6bd5\uff0c\u91ca\u653e\u8d44\u6e90\n\t\t}(i)\n\t}\n\twg.Wait()\n}<\/code><\/pre>\n\n\n\n<p><strong>\u7b2c\u4e8c\uff0c\u4e09\u65b9\u5e93\u5b9e\u73b0\u7684\u534f\u7a0b\u6c60<\/strong><\/p>\n\n\n\n<p>panjf2000\/ants\uff08\u6bd4\u8f83\u706b\uff09<\/p>\n\n\n\n<p>Jeffail\/tunny<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import (\n\t\"log\"\n\t\"time\"\n\n\t\"github.com\/Jeffail\/tunny\"\n)\nfunc main() {\n\tpool := tunny.NewFunc(10, func(i interface{}) interface{} {\n\t\tlog.Println(i)\n\t\ttime.Sleep(time.Second)\n\t\treturn nil\n\t})\n\tdefer pool.Close()\n\n\tfor i := 0; i &lt; 500; i++ {\n\t\tgo pool.Process(i)\n\t}\n\ttime.Sleep(time.Second * 4)\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2\u3001\u591a\u4e2a goroutine \u5bf9\u540c\u4e00\u4e2a map \u5199\u4f1a panic\uff0c\u5f02\u5e38\u662f\u5426\u53ef\u4ee5\u7528 defer \u6355\u83b7\uff1f<\/h3>\n\n\n\n<p>\u53ef\u4ee5\u6355\u83b7\u5f02\u5e38\uff0c\u4f46\u662f\u53ea\u80fd\u6355\u83b7\u4e00\u6b21\uff0cGo\u8bed\u8a00\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u503c\u8fd4\u56de\u6765\u8fd4\u56de\u9519\u8bef\u3002\u4e0d\u8981\u7528\u5f02\u5e38\u4ee3\u66ff\u9519\u8bef\uff0c\u66f4\u4e0d\u8981\u7528\u6765\u63a7\u5236\u6d41\u7a0b\u3002\u5728\u6781\u4e2a\u522b\u7684\u60c5\u51b5\u4e0b\uff0c\u624d\u4f7f\u7528Go\u4e2d\u5f15\u5165\u7684Exception\u5904\u7406\uff1adefer, panic, recover Go\u4e2d\uff0c\u5bf9\u5f02\u5e38\u5904\u7406\u7684\u539f\u5219\u662f\uff1a\u591a\u7528error\u5305\uff0c\u5c11\u7528panic<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>defer func() {\n\t\tif err := recover(); err != nil {\n\t\t\t\/\/ \u6253\u5370\u5f02\u5e38\uff0c\u5173\u95ed\u8d44\u6e90\uff0c\u9000\u51fa\u6b64\u51fd\u6570\n\t\t\tfmt.Println(err)\n\t\t}\n\t}()<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">3\u3001\u5982\u4f55\u4f18\u96c5\u7684\u5b9e\u73b0\u4e00\u4e2a goroutine \u6c60<\/h3>\n\n\n\n<p>\uff08\u767e\u5ea6\u3001\u624b\u5199\u4ee3\u7801\uff0c\u672c\u4eba\u9762\u4f20\u97f3\u63a7\u80a1\u88ab\u95ee\u9053\uff1a\u8bf7\u6c42\u6570\u5927\u4e8e\u6d88\u8d39\u80fd\u529b\u600e\u4e48\u8bbe\u8ba1\u534f\u7a0b\u6c60\uff09<\/p>\n\n\n\n<p>\u8fd9\u4e00\u5757\u80fd\u5543\u4e0b\u6765\uff0coffer\u6ee1\u5929\u98de\uff0c\u8fd9\u5e94\u8be5\u662f\u4fdd\u8bc1\u9ad8\u5e76\u53d1\u7cfb\u7edf\u7a33\u5b9a\u6027\u3001\u9ad8\u53ef\u7528\u7684\u6838\u5fc3\u90e8\u5206\u4e4b\u4e00\u3002<\/p>\n\n\n\n<p><strong>\u5efa\u8bae\u53c2\u8003\uff1a<\/strong><a href=\"https:\/\/link.zhihu.com\/?target=https%3A\/\/blog.csdn.net\/finghting321\/article\/details\/106492915\/\" target=\"_blank\" rel=\"noreferrer noopener\">Golang\u5b66\u4e60\u7bc7&#8211;\u534f\u7a0b\u6c60_Word\u54e5\u7684\u535a\u5ba2-CSDN\u535a\u5ba2_golang\u534f\u7a0b\u6c60<\/a><\/p>\n\n\n\n<p><strong>\u8fd9\u7bc7\u6587\u7ae0\u7684\u76ee\u5f55\u662f\uff1a<\/strong><\/p>\n\n\n\n<p>1. \u4e3a\u4ec0\u4e48\u9700\u8981\u534f\u7a0b\u6c60\uff1f<\/p>\n\n\n\n<p>2. \u7b80\u5355\u7684\u534f\u7a0b\u6c60<\/p>\n\n\n\n<p>3. go-playground\/pool<\/p>\n\n\n\n<p>4. ants\uff08\u63a8\u8350\uff09<\/p>\n\n\n\n<p><strong>\u6240\u4ee5\u76f4\u63a5\u7814\u7a76ants\u5e95\u5c42\u5427\uff0c\u7701\u7684\u9020\u8f6e\u5b50\u3002<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u516b\u3001GC\u76f8\u5173<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1\u3001go gc \u662f\u600e\u4e48\u5b9e\u73b0\u7684\uff1f\uff08\u5fc5\u95ee\uff09<\/h3>\n\n\n\n<p>\u7b54\uff1a<\/p>\n\n\n\n<p><strong>\u7ec6\u5206\u5e38\u89c1\u7684\u4e09\u4e2a\u95ee\u9898\uff1a1\u3001GC\u673a\u5236\u968f\u7740golang\u7248\u672c\u53d8\u5316\u5982\u4f55\u53d8\u5316\u7684\uff1f2\u3001\u4e09\u8272\u6807\u8bb0\u6cd5\u7684\u6d41\u7a0b\uff1f3\u3001\u63d2\u5165\u5c4f\u969c\u3001\u5220\u9664\u5c4f\u969c\uff0c\u6df7\u5408\u5199\u5c4f\u969c\uff08\u5177\u4f53\u7684\u5b9e\u73b0\u6bd4\u8f83\u96be\u63cf\u8ff0\uff0c\u4f46\u4f60\u8981\u77e5\u9053\u5c4f\u969c\u7684\u4f5c\u7528\uff1a\u907f\u514d\u7a0b\u5e8f\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0c\u53d8\u91cf\u88ab\u8bef\u56de\u6536\uff1b\u51cf\u5c11STW\u7684\u65f6\u95f4\uff094\u3001\u867e\u76ae\u8fd8\u95ee\u4e86\u4e2a\u5f00\u653e\u6027\u7684\u9898\u76ee\uff1a\u4f60\u89c9\u5f97\u4ee5\u540eGC\u673a\u5236\u4f1a\u600e\u4e48\u4f18\u5316\uff1f<\/strong><\/p>\n\n\n\n<p>Go \u7684 GC \u56de\u6536\u6709\u4e09\u6b21\u6f14\u8fdb\u8fc7\u7a0b\uff0cGo V1.3 \u4e4b\u524d\u666e\u901a\u6807\u8bb0\u6e05\u9664\uff08mark and sweep\uff09\u65b9\u6cd5\uff0c\u6574\u4f53\u8fc7\u7a0b\u9700\u8981\u542f\u52a8 STW\uff0c\u6548\u7387\u6781\u4f4e\u3002GoV1.5 \u4e09\u8272\u6807\u8bb0\u6cd5\uff0c\u5806\u7a7a\u95f4\u542f\u52a8\u5199\u5c4f\u969c\uff0c\u6808\u7a7a\u95f4\u4e0d\u542f\u52a8\uff0c\u5168\u90e8\u626b\u63cf\u4e4b\u540e\uff0c\u9700\u8981\u91cd\u65b0\u626b\u63cf\u4e00\u6b21\u6808(\u9700\u8981 STW)\uff0c\u6548\u7387\u666e\u901a\u3002GoV1.8 \u4e09\u8272\u6807\u8bb0\u6cd5\uff0c\u6df7\u5408\u5199\u5c4f\u969c\u673a\u5236\uff1a\u6808\u7a7a\u95f4\u4e0d\u542f\u52a8\uff08\u5168\u90e8\u6807\u8bb0\u6210\u9ed1\u8272\uff09\uff0c\u5806\u7a7a\u95f4\u542f\u7528\u5199\u5c4f\u969c\uff0c\u6574\u4e2a\u8fc7\u7a0b\u4e0d\u8981 STW\uff0c\u6548\u7387\u9ad8\u3002<\/p>\n\n\n\n<p>Go1.3 \u4e4b\u524d\u7684\u7248\u672c\u6240\u8c13\u6807\u8bb0\u6e05\u9664\u662f\u5148\u542f\u52a8 STW \u6682\u505c\uff0c\u7136\u540e\u6267\u884c\u6807\u8bb0\uff0c\u518d\u6267\u884c\u6570\u636e\u56de\u6536\uff0c\u6700\u540e\u505c\u6b62 STW\u3002Go1.3 \u7248\u672c\u6807\u8bb0\u6e05\u9664\u505a\u4e86\u70b9\u4f18\u5316\uff0c\u6d41\u7a0b\u662f\uff1a\u5148\u542f\u52a8 STW \u6682\u505c\uff0c\u7136\u540e\u6267\u884c\u6807\u8bb0\uff0c\u505c\u6b62 STW\uff0c\u6700\u540e\u518d\u6267\u884c\u6570\u636e\u56de\u6536\u3002<\/p>\n\n\n\n<p>Go1.5 \u4e09\u8272\u6807\u8bb0\u4e3b\u8981\u662f\u63d2\u5165\u5c4f\u969c\u548c\u5220\u9664\u5c4f\u969c\uff0c\u5199\u5165\u5c4f\u969c\u7684\u6d41\u7a0b\uff1a\u7a0b\u5e8f\u5f00\u59cb\uff0c\u5168\u90e8\u6807\u8bb0\u4e3a\u767d\u8272\uff0c1\uff09\u6240\u6709\u7684\u5bf9\u8c61\u653e\u5230\u767d\u8272\u96c6\u5408\uff0c2\uff09\u904d\u5386\u4e00\u6b21\u6839\u8282\u70b9\uff0c\u5f97\u5230\u7070\u8272\u8282\u70b9\uff0c3\uff09\u904d\u5386\u7070\u8272\u8282\u70b9\uff0c\u5c06\u53ef\u8fbe\u7684\u5bf9\u8c61\uff0c\u4ece\u767d\u8272\u6807\u8bb0\u7070\u8272\uff0c\u904d\u5386\u4e4b\u540e\u7684\u7070\u8272\u6807\u8bb0\u6210\u9ed1\u8272\uff0c4\uff09\u7531\u4e8e\u5e76\u53d1\u7279\u6027\uff0c\u6b64\u523b\u5916\u754c\u5411\u5728\u5806\u4e2d\u7684\u5bf9\u8c61\u53d1\u751f\u6dfb\u52a0\u5bf9\u8c61\uff0c\u4ee5\u53ca\u5728\u6808\u4e2d\u7684\u5bf9\u8c61\u6dfb\u52a0\u5bf9\u8c61\uff0c\u5728\u5806\u4e2d\u7684\u5bf9\u8c61\u4f1a\u89e6\u53d1\u63d2\u5165\u5c4f\u969c\u673a\u5236\uff0c\u6808\u4e2d\u7684\u5bf9\u8c61\u4e0d\u89e6\u53d1\uff0c5\uff09\u7531\u4e8e\u5806\u4e2d\u5bf9\u8c61\u63d2\u5165\u5c4f\u969c\uff0c\u5219\u4f1a\u628a\u5806\u4e2d\u9ed1\u8272\u5bf9\u8c61\u6dfb\u52a0\u7684\u767d\u8272\u5bf9\u8c61\u6539\u6210\u7070\u8272\uff0c\u6808\u4e2d\u7684\u9ed1\u8272\u5bf9\u8c61\u6dfb\u52a0\u7684\u767d\u8272\u5bf9\u8c61\u4f9d\u7136\u662f\u767d\u8272\uff0c6\uff09\u5faa\u73af\u7b2c 5 \u6b65\uff0c\u76f4\u5230\u6ca1\u6709\u7070\u8272\u8282\u70b9\uff0c7\uff09\u5728\u51c6\u5907\u56de\u6536\u767d\u8272\u524d\uff0c\u91cd\u65b0\u904d\u5386\u626b\u63cf\u4e00\u6b21\u6808\u7a7a\u95f4\uff0c\u52a0\u4e0a STW \u6682\u505c\u4fdd\u62a4\u6808\uff0c\u9632\u6b62\u5916\u754c\u5e72\u6270\uff08\u6709\u65b0\u7684\u767d\u8272\u4f1a\u88ab\u6dfb\u52a0\u6210\u9ed1\u8272\uff09\u5728 STW \u4e2d\uff0c\u5c06\u6808\u4e2d\u7684\u5bf9\u8c61\u4e00\u6b21\u4e09\u8272\u6807\u8bb0\uff0c\u76f4\u5230\u6ca1\u6709\u7070\u8272\uff0c8\uff09\u505c\u6b62 STW\uff0c\u6e05\u9664\u767d\u8272\u3002\u81f3\u4e8e\u5220\u9664\u5199\u5c4f\u969c\uff0c\u5219\u662f\u904d\u5386\u7070\u8272\u8282\u70b9\u7684\u65f6\u5019\u51fa\u73b0\u53ef\u8fbe\u7684\u8282\u70b9\u88ab\u5220\u9664\uff0c\u8fd9\u4e2a\u65f6\u5019\u89e6\u53d1\u5220\u9664\u5199\u5c4f\u969c\uff0c\u8fd9\u4e2a\u53ef\u8fbe\u7684\u88ab\u5220\u9664\u7684\u8282\u70b9\u4e5f\u662f\u7070\u8272\uff0c\u7b49\u5faa\u73af\u4e09\u8272\u6807\u8bb0\u4e4b\u540e\uff0c\u76f4\u5230\u6ca1\u6709\u7070\u8272\u8282\u70b9\uff0c\u7136\u540e\u6e05\u7406\u767d\u8272\uff0c\u5220\u9664\u5199\u5c4f\u969c\u4f1a\u9020\u6210\u4e00\u4e2a\u5bf9\u8c61\u5373\u4f7f\u88ab\u5220\u9664\u4e86\u6700\u540e\u4e00\u4e2a\u6307\u5411\u5b83\u7684\u6307\u9488\u4e5f\u4f9d\u65e7\u53ef\u4ee5\u6d3b\u8fc7\u8fd9\u4e00\u8f6e\uff0c\u5728\u4e0b\u4e00\u8f6e GC \u4e2d\u88ab\u6e05\u7406\u6389\u3002<\/p>\n\n\n\n<p>GoV1.8 \u6df7\u5408\u5199\u5c4f\u969c\u89c4\u5219\u662f\uff1a<\/p>\n\n\n\n<p>1\uff09GC \u5f00\u59cb\u5c06\u6808\u4e0a\u7684\u5bf9\u8c61\u5168\u90e8\u626b\u63cf\u5e76\u6807\u8bb0\u4e3a\u9ed1\u8272(\u4e4b\u540e\u4e0d\u518d\u8fdb\u884c\u7b2c\u4e8c\u6b21\u91cd\u590d\u626b\u63cf\uff0c\u65e0\u9700 STW)\uff0c2\uff09GC \u671f\u95f4\uff0c\u4efb\u4f55\u5728\u6808\u4e0a\u521b\u5efa\u7684\u65b0\u5bf9\u8c61\uff0c\u5747\u4e3a\u9ed1\u8272\u30023\uff09\u88ab\u5220\u9664\u7684\u5bf9\u8c61\u6807\u8bb0\u4e3a\u7070\u8272\u30024\uff09\u88ab\u6dfb\u52a0\u7684\u5bf9\u8c61\u6807\u8bb0\u4e3a\u7070\u8272\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2\u3001go \u662f gc \u7b97\u6cd5\u662f\u600e\u4e48\u5b9e\u73b0\u7684\uff1f \uff08\u5f97\u7269\uff0c\u51fa\u73b0\u9891\u7387\u4f4e\uff09<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>func GC() {\n\tn := atomic.Load(&amp;amp;work.cycles)\n\tgcWaitOnMark(n)\n\n\tgcStart(gcTrigger{kind: gcTriggerCycle, n: n + 1})\n\tgcWaitOnMark(n + 1)\n\n\tfor atomic.Load(&amp;amp;work.cycles) == n+1 &amp;amp;&amp;amp; sweepone() != ^uintptr(0) {\n\t\tsweep.nbgsweep++\n\t\tGosched()\n\t}\n\tfor atomic.Load(&amp;amp;work.cycles) == n+1 &amp;amp;&amp;amp; atomic.Load(&amp;amp;mheap_.sweepers) != 0 {\n\t\tGosched()\n\t}\n\tmp := acquirem()\n\tcycle := atomic.Load(&amp;amp;work.cycles)\n\tif cycle == n+1 || (gcphase == _GCmark &amp;amp;&amp;amp; cycle == n+2) {\n\t\tmProf_PostSweep()\n\t}\n\treleasem(mp)\n}<\/code><\/pre>\n\n\n\n<p>\u5e95\u5c42\u539f\u7406\u4e86\uff0c\u53ef\u80fd\u5927\u5382\uff0c\u4e2d\u9ad8\u7ea7\u624d\u4f1a\u95ee\uff0c\u53c2\u8003\uff1a<a href=\"https:\/\/link.zhihu.com\/?target=https%3A\/\/blog.csdn.net\/shudaqi2010\/article\/details\/90025192\" target=\"_blank\" rel=\"noreferrer noopener\">Golang GC\u7b97\u6cd5\u89e3\u8bfb_suchy_sz\u7684\u535a\u5ba2-CSDN\u535a\u5ba2_go\u7684gc\u7b97\u6cd5<\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3\u3001GC \u4e2d stw \u65f6\u673a\uff0c\u5404\u4e2a\u9636\u6bb5\u662f\u5982\u4f55\u89e3\u51b3\u7684\uff1f \uff08\u767e\u5ea6\uff09<\/h3>\n\n\n\n<p><strong>\u5e95\u5c42\u539f\u7406\uff0c\u81ea\u884c\u767e\u5ea6\u4e00\u4e0b\uff0c\u6211\u7b49\u6e23\u6e23\u7b80\u5386\u90fd\u8fc7\u4e0d\u4e86BAT\uff0c\u5b57\u8282\uff0c\u867e\u76ae\uff0c\u7279\u4f7f\u62c9\u4ee5\u53ca\u4e00\u4e9b\u56fdQ\u8fd8\u80fd\u6536\u5230\u9762\u8bd5\u9080\u7ea6<\/strong>\u3002<\/p>\n\n\n\n<p>1\uff09\u5728\u5f00\u59cb\u65b0\u7684\u4e00\u8f6e GC \u5468\u671f\u524d\uff0c\u9700\u8981\u8c03\u7528 gcWaitOnMark \u65b9\u6cd5\u4e0a\u4e00\u8f6e GC \u7684\u6807\u8bb0\u7ed3\u675f\uff08\u542b\u626b\u63cf\u7ec8\u6b62\u3001\u6807\u8bb0\u3001\u6216\u6807\u8bb0\u7ec8\u6b62\u7b49\uff09\u3002<\/p>\n\n\n\n<p>2\uff09\u5f00\u59cb\u65b0\u7684\u4e00\u8f6e GC \u5468\u671f\uff0c\u8c03\u7528 gcStart \u65b9\u6cd5\u89e6\u53d1 GC \u884c\u4e3a\uff0c\u5f00\u59cb\u626b\u63cf\u6807\u8bb0\u9636\u6bb5\u3002<\/p>\n\n\n\n<p>3\uff09\u9700\u8981\u8c03\u7528 gcWaitOnMark \u65b9\u6cd5\u7b49\u5f85\uff0c\u76f4\u5230\u5f53\u524d GC \u5468\u671f\u7684\u626b\u63cf\u3001\u6807\u8bb0\u3001\u6807\u8bb0\u7ec8\u6b62\u5b8c\u6210\u3002<\/p>\n\n\n\n<p>4\uff09\u9700\u8981\u8c03\u7528 sweepone \u65b9\u6cd5\uff0c\u626b\u63cf\u672a\u626b\u9664\u7684\u5806\u8de8\u5ea6\uff0c\u5e76\u6301\u7eed\u626b\u9664\uff0c\u4fdd\u8bc1\u6e05\u7406\u5b8c\u6210\u3002\u5728\u7b49\u5f85\u626b\u9664\u5b8c\u6bd5\u524d\u7684\u963b\u585e\u65f6\u95f4\uff0c\u4f1a\u8c03\u7528 Gosched \u8ba9\u51fa\u3002<\/p>\n\n\n\n<p>5\uff09\u5728\u672c\u8f6e GC \u5df2\u7ecf\u57fa\u672c\u5b8c\u6210\u540e\uff0c\u4f1a\u8c03\u7528 mProf_PostSweep \u65b9\u6cd5\u3002\u4ee5\u6b64\u8bb0\u5f55\u6700\u540e\u4e00\u6b21\u6807\u8bb0\u7ec8\u6b62\u65f6\u7684\u5806\u914d\u7f6e\u6587\u4ef6\u5feb\u7167\u3002<\/p>\n\n\n\n<p>6\uff09\u7ed3\u675f\uff0c\u91ca\u653e M\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4\u3001GC \u7684\u89e6\u53d1\u65f6\u673a\uff1f<\/h3>\n\n\n\n<p>\u521d\u7ea7\u5fc5\u95ee\uff0c\u5206\u4e3a\u7cfb\u7edf\u89e6\u53d1\u548c\u4e3b\u52a8\u89e6\u53d1\u3002<\/p>\n\n\n\n<p>1\uff09gcTriggerHeap\uff1a\u5f53\u6240\u5206\u914d\u7684\u5806\u5927\u5c0f\u8fbe\u5230\u9608\u503c\uff08\u7531\u63a7\u5236\u5668\u8ba1\u7b97\u7684\u89e6\u53d1\u5806\u7684\u5927\u5c0f\uff09\u65f6\uff0c\u5c06\u4f1a\u89e6\u53d1\u3002<\/p>\n\n\n\n<p>2\uff09gcTriggerTime\uff1a\u5f53\u8ddd\u79bb\u4e0a\u4e00\u4e2a GC \u5468\u671f\u7684\u65f6\u95f4\u8d85\u8fc7\u4e00\u5b9a\u65f6\u95f4\u65f6\uff0c\u5c06\u4f1a\u89e6\u53d1\u3002\u65f6\u95f4\u5468\u671f\u4ee5runtime.forcegcperiod \u53d8\u91cf\u4e3a\u51c6\uff0c\u9ed8\u8ba4 2 \u5206\u949f\u3002<\/p>\n\n\n\n<p>3\uff09gcTriggerCycle\uff1a\u5982\u679c\u6ca1\u6709\u5f00\u542f GC\uff0c\u5219\u542f\u52a8 GC\u3002<\/p>\n\n\n\n<p>4\uff09\u624b\u52a8\u89e6\u53d1\u7684 runtime.GC \u65b9\u6cd5\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e5d\u3001\u5185\u5b58\u76f8\u5173<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1\u3001\u8c08\u8c08\u5185\u5b58\u6cc4\u9732\uff0c\u4ec0\u4e48\u60c5\u51b5\u4e0b\u5185\u5b58\u4f1a\u6cc4\u9732\uff1f\u600e\u4e48\u5b9a\u4f4d\u6392\u67e5\u5185\u5b58\u6cc4\u6f0f\u95ee\u9898\uff1f<\/h3>\n\n\n\n<p>\u7b54\uff1ago \u4e2d\u7684\u5185\u5b58\u6cc4\u6f0f\u4e00\u822c\u90fd\u662f goroutine \u6cc4\u6f0f\uff0c\u5c31\u662f goroutine \u6ca1\u6709\u88ab\u5173\u95ed\uff0c\u6216\u8005\u6ca1\u6709\u6dfb\u52a0\u8d85\u65f6\u63a7\u5236\uff0c\u8ba9 goroutine \u4e00\u53ea\u5904\u4e8e\u963b\u585e\u72b6\u6001\uff0c\u4e0d\u80fd\u88ab GC\u3002<\/p>\n\n\n\n<p><strong>\u5185\u5b58\u6cc4\u9732\u6709\u4e0b\u9762\u4e00\u4e9b\u60c5\u51b5<\/strong><\/p>\n\n\n\n<p>1\uff09\u5982\u679c goroutine \u5728\u6267\u884c\u65f6\u88ab\u963b\u585e\u800c\u65e0\u6cd5\u9000\u51fa\uff0c\u5c31\u4f1a\u5bfc\u81f4 goroutine \u7684\u5185\u5b58\u6cc4\u6f0f\uff0c\u4e00\u4e2a goroutine \u7684\u6700\u4f4e\u6808\u5927\u5c0f\u4e3a 2KB\uff0c\u5728\u9ad8\u5e76\u53d1\u7684\u573a\u666f\u4e0b\uff0c\u5bf9\u5185\u5b58\u7684\u6d88\u8017\u4e5f\u662f\u975e\u5e38\u6050\u6016\u7684\u3002<\/p>\n\n\n\n<p>2\uff09\u4e92\u65a5\u9501\u672a\u91ca\u653e\u6216\u8005\u9020\u6210\u6b7b\u9501\u4f1a\u9020\u6210\u5185\u5b58\u6cc4\u6f0f<\/p>\n\n\n\n<p>3\uff09time.Ticker \u662f\u6bcf\u9694\u6307\u5b9a\u7684\u65f6\u95f4\u5c31\u4f1a\u5411\u901a\u9053\u5185\u5199\u6570\u636e\u3002\u4f5c\u4e3a\u5faa\u73af\u89e6\u53d1\u5668\uff0c\u5fc5\u987b\u8c03\u7528 stop \u65b9\u6cd5\u624d\u4f1a\u505c\u6b62\uff0c\u4ece\u800c\u88ab GC \u6389\uff0c\u5426\u5219\u4f1a\u4e00\u76f4\u5360\u7528\u5185\u5b58\u7a7a\u95f4\u3002<\/p>\n\n\n\n<p>4\uff09\u5b57\u7b26\u4e32\u7684\u622a\u53d6\u5f15\u53d1\u4e34\u65f6\u6027\u7684\u5185\u5b58\u6cc4\u6f0f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>func main() {\n\tvar str0 = \"12345678901234567890\"\n\tstr1 := str0&#91;:10]\n}<\/code><\/pre>\n\n\n\n<p>5\uff09\u5207\u7247\u622a\u53d6\u5f15\u8d77\u5b50\u5207\u7247\u5185\u5b58\u6cc4\u6f0f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>func main() {\n\tvar s0 = &#91;]int{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}\n\ts1 := s0&#91;:3]\n}<\/code><\/pre>\n\n\n\n<p>6\uff09\u51fd\u6570\u6570\u7ec4\u4f20\u53c2\u5f15\u53d1\u5185\u5b58\u6cc4\u6f0f\u3010\u5982\u679c\u6211\u4eec\u5728\u51fd\u6570\u4f20\u53c2\u7684\u65f6\u5019\u7528\u5230\u4e86\u6570\u7ec4\u4f20\u53c2\uff0c\u4e14\u8fd9\u4e2a\u6570\u7ec4\u591f\u5927\uff08\u6211\u4eec\u5047\u8bbe\u6570\u7ec4\u5927\u5c0f\u4e3a 100 \u4e07\uff0c64 \u4f4d\u673a\u4e0a\u6d88\u8017\u7684\u5185\u5b58\u7ea6\u4e3a 800w \u5b57\u8282\uff0c\u5373 8MB \u5185\u5b58\uff09\uff0c\u6216\u8005\u8be5\u51fd\u6570\u77ed\u65f6\u95f4\u5185\u88ab\u8c03\u7528 N \u6b21\uff0c\u90a3\u4e48\u53ef\u60f3\u800c\u77e5\uff0c\u4f1a\u6d88\u8017\u5927\u91cf\u5185\u5b58\uff0c\u5bf9\u6027\u80fd\u4ea7\u751f\u6781\u5927\u7684\u5f71\u54cd\uff0c\u5982\u679c\u77ed\u65f6\u95f4\u5185\u5206\u914d\u5927\u91cf\u5185\u5b58\uff0c\u800c\u53c8\u6765\u4e0d\u53ca GC\uff0c\u90a3\u4e48\u5c31\u4f1a\u4ea7\u751f\u4e34\u65f6\u6027\u7684\u5185\u5b58\u6cc4\u6f0f\uff0c\u5bf9\u4e8e\u9ad8\u5e76\u53d1\u573a\u666f\u76f8\u5f53\u53ef\u6015\u3002\u3011<\/p>\n\n\n\n<p><strong>\u6392\u67e5\u65b9\u5f0f\uff1a<\/strong><\/p>\n\n\n\n<p>\u4e00\u822c\u901a\u8fc7 pprof \u662f Go \u7684\u6027\u80fd\u5206\u6790\u5de5\u5177\uff0c\u5728\u7a0b\u5e8f\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0c\u53ef\u4ee5\u8bb0\u5f55\u7a0b\u5e8f\u7684\u8fd0\u884c\u4fe1\u606f\uff0c\u53ef\u4ee5\u662f CPU \u4f7f\u7528\u60c5\u51b5\u3001\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\u3001goroutine \u8fd0\u884c\u60c5\u51b5\u7b49\uff0c\u5f53\u9700\u8981\u6027\u80fd\u8c03\u4f18\u6216\u8005\u5b9a\u4f4d Bug \u65f6\u5019\uff0c\u8fd9\u4e9b\u8bb0\u5f55\u7684\u4fe1\u606f\u662f\u76f8\u5f53\u91cd\u8981\u3002<\/p>\n\n\n\n<p><strong>\u5f53\u7136\u4f60\u80fd\u8bf4\u8bf4\u5177\u4f53\u7684\u5206\u6790\u6307\u6807\u66f4\u52a0\u5206\u54af\uff0c\u6709\u7684\u9762\u8bd5\u5b98\u5c31\u559c\u6b22\u4ed6\u95ee\u4ec0\u4e48\uff0c\u4f60\u7b80\u6d01\u7684\u56de\u7b54\u4ec0\u4e48\uff0c\u4e0d\u559c\u6b22\u5df4\u62c9\u5df4\u62c9\u8be6\u7ec6\u89e3\u91ca\u4e00\u901a\uff0c\u6bd4\u5982\u867eP\u9762\u8bd5\u5b98\uff0c\u4e0d\u8fc7\u4ed6\u8003\u5bdf\u7684\u5185\u5bb9\u7279\u522b\u591a\uff0c\u53ef\u80fd\u662f\u4e3a\u4e86\u8282\u7ea6\u65f6\u95f4\u3002<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2\u3001\u77e5\u9053 golang \u7684\u5185\u5b58\u9003\u9038\u5417\uff1f\u4ec0\u4e48\u60c5\u51b5\u4e0b\u4f1a\u53d1\u751f\u5185\u5b58\u9003\u9038\uff1f\uff08\u5fc5\u95ee\uff09<\/h3>\n\n\n\n<p>\u7b54\uff1a1)\u672c\u8be5\u5206\u914d\u5230\u6808\u4e0a\u7684\u53d8\u91cf\uff0c\u8dd1\u5230\u4e86\u5806\u4e0a\uff0c\u8fd9\u5c31\u5bfc\u81f4\u4e86\u5185\u5b58\u9003\u9038\u30022)\u6808\u662f\u9ad8\u5730\u5740\u5230\u4f4e\u5730\u5740\uff0c\u6808\u4e0a\u7684\u53d8\u91cf\uff0c\u51fd\u6570\u7ed3\u675f\u540e\u53d8\u91cf\u4f1a\u8ddf\u7740\u56de\u6536\u6389\uff0c\u4e0d\u4f1a\u6709\u989d\u5916\u6027\u80fd\u7684\u5f00\u9500\u30023)\u53d8\u91cf\u4ece\u6808\u9003\u9038\u5230\u5806\u4e0a\uff0c\u5982\u679c\u8981\u56de\u6536\u6389\uff0c\u9700\u8981\u8fdb\u884c gc\uff0c\u90a3\u4e48 gc \u4e00\u5b9a\u4f1a\u5e26\u6765\u989d\u5916\u7684\u6027\u80fd\u5f00\u9500\u3002\u7f16\u7a0b\u8bed\u8a00\u4e0d\u65ad\u4f18\u5316 gc \u7b97\u6cd5\uff0c\u4e3b\u8981\u76ee\u7684\u90fd\u662f\u4e3a\u4e86\u51cf\u5c11 gc \u5e26\u6765\u7684\u989d\u5916\u6027\u80fd\u5f00\u9500\uff0c\u53d8\u91cf\u4e00\u65e6\u9003\u9038\u4f1a\u5bfc\u81f4\u6027\u80fd\u5f00\u9500\u53d8\u5927\u3002<\/p>\n\n\n\n<p><strong>\u5185\u5b58\u9003\u9038\u7684\u60c5\u51b5\u5982\u4e0b\uff1a<\/strong><\/p>\n\n\n\n<p>1\uff09\u65b9\u6cd5\u5185\u8fd4\u56de\u5c40\u90e8\u53d8\u91cf\u6307\u9488\u3002<\/p>\n\n\n\n<p>2\uff09\u5411 channel \u53d1\u9001\u6307\u9488\u6570\u636e\u3002<\/p>\n\n\n\n<p>3\uff09\u5728\u95ed\u5305\u4e2d\u5f15\u7528\u5305\u5916\u7684\u503c\u3002<\/p>\n\n\n\n<p>4\uff09\u5728 slice \u6216 map \u4e2d\u5b58\u50a8\u6307\u9488\u3002<\/p>\n\n\n\n<p>5\uff09\u5207\u7247\uff08\u6269\u5bb9\u540e\uff09\u957f\u5ea6\u592a\u5927\u3002<\/p>\n\n\n\n<p>6\uff09\u5728 interface \u7c7b\u578b\u4e0a\u8c03\u7528\u65b9\u6cd5\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3\u3001\u8bf7\u7b80\u8ff0 Go \u662f\u5982\u4f55\u5206\u914d\u5185\u5b58\u7684\uff1f<\/h3>\n\n\n\n<p>mcache mcentral mheap mspan<\/p>\n\n\n\n<p>Go \u7a0b\u5e8f\u542f\u52a8\u7684\u65f6\u5019\u7533\u8bf7\u4e00\u5927\u5757\u5185\u5b58\uff0c\u5e76\u4e14\u5212\u5206 spans\uff0cbitmap\uff0careana \u533a\u57df\uff1barena \u533a\u57df\u6309\u7167\u9875\u5212\u5206\u6210\u4e00\u4e2a\u4e2a\u5c0f\u5757\uff0cspan \u7ba1\u7406\u4e00\u4e2a\u6216\u8005\u591a\u4e2a\u9875\uff0cmcentral \u7ba1\u7406\u591a\u4e2a span \u4f9b\u73b0\u573a\u7533\u8bf7\u4f7f\u7528\uff1bmcache \u4f5c\u4e3a\u7ebf\u7a0b\u79c1\u6709\u8d44\u6e90\uff0c\u6765\u6e90\u4e8e mcentral\u3002<\/p>\n\n\n\n<p><strong>\u8fd9\u91cc\u63cf\u8ff0\u7684\u6bd4\u8f83\u7b80\u5355\uff0c\u4f60\u53ef\u4ee5\u81ea\u5df1\u518d\u53bb\u641c\u7d22\u4e0b\u66f4\u7b80\u6d01\u5b8c\u6574\u7684\u7b54\u6848\u3002<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4\u3001Channel \u5206\u914d\u5728\u6808\u4e0a\u8fd8\u662f\u5806\u4e0a\uff1f\u54ea\u4e9b\u5bf9\u8c61\u5206\u914d\u5728\u5806\u4e0a\uff0c\u54ea\u4e9b\u5bf9\u8c61\u5206\u914d\u5728\u6808\u4e0a\uff1f<\/h3>\n\n\n\n<p>Channel \u88ab\u8bbe\u8ba1\u7528\u6765\u5b9e\u73b0\u534f\u7a0b\u95f4\u901a\u4fe1\u7684\u7ec4\u4ef6\uff0c\u5176\u4f5c\u7528\u57df\u548c\u751f\u547d\u5468\u671f\u4e0d\u53ef\u80fd\u4ec5\u9650\u4e8e\u67d0\u4e2a\u51fd\u6570\u5185\u90e8\uff0c\u6240\u4ee5 golang \u76f4\u63a5\u5c06\u5176\u5206\u914d\u5728\u5806\u4e0a<\/p>\n\n\n\n<p>\u51c6\u786e\u5730\u8bf4\uff0c\u4f60\u5e76\u4e0d\u9700\u8981\u77e5\u9053\u3002Golang \u4e2d\u7684\u53d8\u91cf\u53ea\u8981\u88ab\u5f15\u7528\u5c31\u4e00\u76f4\u4f1a\u5b58\u6d3b\uff0c\u5b58\u50a8\u5728\u5806\u4e0a\u8fd8\u662f\u6808\u4e0a\u7531\u5185\u90e8\u5b9e\u73b0\u51b3\u5b9a\u800c\u548c\u5177\u4f53\u7684\u8bed\u6cd5\u6ca1\u6709\u5173\u7cfb\u3002<\/p>\n\n\n\n<p>\u77e5\u9053\u53d8\u91cf\u7684\u5b58\u50a8\u4f4d\u7f6e\u786e\u5b9e\u548c\u6548\u7387\u7f16\u7a0b\u6709\u5173\u7cfb\u3002\u5982\u679c\u53ef\u80fd\uff0cGolang \u7f16\u8bd1\u5668\u4f1a\u5c06\u51fd\u6570\u7684\u5c40\u90e8\u53d8\u91cf\u5206\u914d\u5230\u51fd\u6570\u6808\u5e27\uff08stack frame\uff09\u4e0a\u3002\u7136\u800c\uff0c\u5982\u679c\u7f16\u8bd1\u5668\u4e0d\u80fd\u786e\u4fdd\u53d8\u91cf\u5728\u51fd\u6570 return \u4e4b\u540e\u4e0d\u518d\u88ab\u5f15\u7528\uff0c\u7f16\u8bd1\u5668\u5c31\u4f1a\u5c06\u53d8\u91cf\u5206\u914d\u5230\u5806\u4e0a\u3002\u800c\u4e14\uff0c\u5982\u679c\u4e00\u4e2a\u5c40\u90e8\u53d8\u91cf\u975e\u5e38\u5927\uff0c\u90a3\u4e48\u5b83\u4e5f\u5e94\u8be5\u88ab\u5206\u914d\u5230\u5806\u4e0a\u800c\u4e0d\u662f\u6808\u4e0a\u3002<\/p>\n\n\n\n<p>\u5f53\u524d\u60c5\u51b5\u4e0b\uff0c\u5982\u679c\u4e00\u4e2a\u53d8\u91cf\u88ab\u53d6\u5730\u5740\uff0c\u90a3\u4e48\u5b83\u5c31\u6709\u53ef\u80fd\u88ab\u5206\u914d\u5230\u5806\u4e0a,\u7136\u800c\uff0c\u8fd8\u8981\u5bf9\u8fd9\u4e9b\u53d8\u91cf\u505a\u9003\u9038\u5206\u6790\uff0c\u5982\u679c\u51fd\u6570 return \u4e4b\u540e\uff0c\u53d8\u91cf\u4e0d\u518d\u88ab\u5f15\u7528\uff0c\u5219\u5c06\u5176\u5206\u914d\u5230\u6808\u4e0a\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5\u3001\u4ecb\u7ecd\u4e00\u4e0b\u5927\u5bf9\u8c61\u5c0f\u5bf9\u8c61\uff0c\u4e3a\u4ec0\u4e48\u5c0f\u5bf9\u8c61\u591a\u4e86\u4f1a\u9020\u6210 gc \u538b\u529b\uff1f<\/h3>\n\n\n\n<p>\u5c0f\u4e8e\u7b49\u4e8e 32k \u7684\u5bf9\u8c61\u5c31\u662f\u5c0f\u5bf9\u8c61\uff0c\u5176\u5b83\u90fd\u662f\u5927\u5bf9\u8c61\u3002\u4e00\u822c\u5c0f\u5bf9\u8c61\u901a\u8fc7 mspan \u5206\u914d\u5185\u5b58\uff1b\u5927\u5bf9\u8c61\u5219\u76f4\u63a5\u7531 mheap \u5206\u914d\u5185\u5b58\u3002\u901a\u5e38\u5c0f\u5bf9\u8c61\u8fc7\u591a\u4f1a\u5bfc\u81f4 GC \u4e09\u8272\u6cd5\u6d88\u8017\u8fc7\u591a\u7684 CPU\u3002\u4f18\u5316\u601d\u8def\u662f\uff0c\u51cf\u5c11\u5bf9\u8c61\u5206\u914d\u3002<\/p>\n\n\n\n<p>\u5c0f\u5bf9\u8c61\uff1a\u5982\u679c\u7533\u8bf7\u5c0f\u5bf9\u8c61\u65f6\uff0c\u53d1\u73b0\u5f53\u524d\u5185\u5b58\u7a7a\u95f4\u4e0d\u5b58\u5728\u7a7a\u95f2\u8de8\u5ea6\u65f6\uff0c\u5c06\u4f1a\u9700\u8981\u8c03\u7528 nextFree \u65b9\u6cd5\u83b7\u53d6\u65b0\u7684\u53ef\u7528\u7684\u5bf9\u8c61\uff0c\u53ef\u80fd\u4f1a\u89e6\u53d1 GC \u884c\u4e3a\u3002<\/p>\n\n\n\n<p>\u5927\u5bf9\u8c61\uff1a\u5982\u679c\u7533\u8bf7\u5927\u4e8e 32k \u4ee5\u4e0a\u7684\u5927\u5bf9\u8c61\u65f6\uff0c\u53ef\u80fd\u4f1a\u89e6\u53d1 GC \u884c\u4e3a\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5341\u3001\u5176\u4ed6\u95ee\u9898<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1\u3001Go \u591a\u8fd4\u56de\u503c\u600e\u4e48\u5b9e\u73b0\u7684\uff1f<\/h3>\n\n\n\n<p>\u7b54\uff1aGo \u4f20\u53c2\u548c\u8fd4\u56de\u503c\u662f\u901a\u8fc7 FP+offset \u5b9e\u73b0\uff0c\u5e76\u4e14\u5b58\u50a8\u5728\u8c03\u7528\u51fd\u6570\u7684\u6808\u5e27\u4e2d\u3002FP \u6808\u5e95\u5bc4\u5b58\u5668\uff0c\u6307\u5411\u4e00\u4e2a\u51fd\u6570\u6808\u7684\u9876\u90e8;PC \u7a0b\u5e8f\u8ba1\u6570\u5668\uff0c\u6307\u5411\u4e0b\u4e00\u6761\u6267\u884c\u6307\u4ee4;SB \u6307\u5411\u9759\u6001\u6570\u636e\u7684\u57fa\u6307\u9488\uff0c\u5168\u5c40\u7b26\u53f7;SP \u6808\u9876\u5bc4\u5b58\u5668\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2\u3001\u8bb2\u8bb2 Go \u4e2d\u4e3b\u534f\u7a0b\u5982\u4f55\u7b49\u5f85\u5176\u4f59\u534f\u7a0b\u9000\u51fa?<\/h3>\n\n\n\n<p>\u7b54\uff1aGo \u7684 sync.WaitGroup \u662f\u7b49\u5f85\u4e00\u7ec4\u534f\u7a0b\u7ed3\u675f\uff0csync.WaitGroup \u53ea\u6709 3 \u4e2a\u65b9\u6cd5\uff0cAdd()\u662f\u6dfb\u52a0\u8ba1\u6570\uff0cDone()\u51cf\u53bb\u4e00\u4e2a\u8ba1\u6570\uff0cWait()\u963b\u585e\u76f4\u5230\u6240\u6709\u7684\u4efb\u52a1\u5b8c\u6210\u3002Go \u91cc\u9762\u8fd8\u80fd\u901a\u8fc7\u6709\u7f13\u51b2\u7684 channel \u5b9e\u73b0\u5176\u963b\u585e\u7b49\u5f85\u4e00\u7ec4\u534f\u7a0b\u7ed3\u675f\uff0c\u8fd9\u4e2a\u4e0d\u80fd\u4fdd\u8bc1\u4e00\u7ec4 goroutine \u6309\u7167\u987a\u5e8f\u6267\u884c\uff0c\u53ef\u4ee5\u5e76\u53d1\u6267\u884c\u534f\u7a0b\u3002Go \u91cc\u9762\u80fd\u901a\u8fc7\u65e0\u7f13\u51b2\u7684 channel \u5b9e\u73b0\u5176\u963b\u585e\u7b49\u5f85\u4e00\u7ec4\u534f\u7a0b\u7ed3\u675f\uff0c\u8fd9\u4e2a\u80fd\u4fdd\u8bc1\u4e00\u7ec4 goroutine \u6309\u7167\u987a\u5e8f\u6267\u884c\uff0c\u4f46\u662f\u4e0d\u80fd\u5e76\u53d1\u6267\u884c\u3002<\/p>\n\n\n\n<p><strong>\u5570\u55e6\u4e00\u53e5\uff1a<\/strong>\u5faa\u73af\u667a\u80fd\u4e8c\u9762\uff0c\u624b\u5199\u4ee3\u7801\u90e8\u5206\u65f6\uff0c\u4e09\u4e2a\u534f\u7a0b\u6309\u4ea4\u66ff\u987a\u5e8f\u6253\u5370\u6570\u5b57\uff0c\u6700\u540e\u9898\u76ee\u505a\u51fa\u6765\u4e86\uff0c\u95ee\u6211\u4ee3\u7801\u4e2dAdd()\u662f\u4ec0\u4e48\u610f\u601d\uff0c\u6211\u56de\u7b54\u7684\u4e0d\u662f\u5f88\u6e05\u6670\uff0c\u8fd9\u5bb6\u516c\u53f8\u5c31\u6ca1\u6709\u7136\u540e\u4e86\u3002Add()\u8868\u793a\u534f\u7a0b\u8ba1\u6570\uff0c\u53ef\u4ee5\u4e00\u6b21Add\u591a\u4e2a\uff0c\u5982Add(3),\u53ef\u4ee5\u591a\u6b21Add(1);\u7136\u540e\u6bcf\u4e2a\u5b50\u534f\u7a0b\u5fc5\u987b\u8c03\u7528done\uff08\uff09,\u8fd9\u6837\u624d\u80fd\u4fdd\u8bc1\u6240\u6709\u5b50\u534f\u7a0b\u7ed3\u675f\uff0c\u4e3b\u534f\u7a0b\u624d\u80fd\u7ed3\u675f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3\u3001Go \u8bed\u8a00\u4e2d\u4e0d\u540c\u7684\u7c7b\u578b\u5982\u4f55\u6bd4\u8f83\u662f\u5426\u76f8\u7b49\uff1f<\/h3>\n\n\n\n<p>\u7b54\uff1a\u50cf string\uff0cint\uff0cfloat interface \u7b49\u53ef\u4ee5\u901a\u8fc7 reflect.DeepEqual \u548c\u7b49\u4e8e\u53f7\u8fdb\u884c\u6bd4\u8f83\uff0c\u50cf slice\uff0cstruct\uff0cmap \u5219\u4e00\u822c\u4f7f\u7528 reflect.DeepEqual \u6765\u68c0\u6d4b\u662f\u5426\u76f8\u7b49\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4\u3001Go \u4e2d init \u51fd\u6570\u7684\u7279\u5f81?<\/h3>\n\n\n\n<p>\u7b54\uff1a\u4e00\u4e2a\u5305\u4e0b\u53ef\u4ee5\u6709\u591a\u4e2a init \u51fd\u6570\uff0c\u6bcf\u4e2a\u6587\u4ef6\u4e5f\u53ef\u4ee5\u6709\u591a\u4e2a init \u51fd\u6570\u3002\u591a\u4e2a init \u51fd\u6570\u6309\u7167\u5b83\u4eec\u7684\u6587\u4ef6\u540d\u987a\u5e8f\u9010\u4e2a\u521d\u59cb\u5316\u3002\u5e94\u7528\u521d\u59cb\u5316\u65f6\u521d\u59cb\u5316\u5de5\u4f5c\u7684\u987a\u5e8f\u662f\uff0c\u4ece\u88ab\u5bfc\u5165\u7684\u6700\u6df1\u5c42\u5305\u5f00\u59cb\u8fdb\u884c\u521d\u59cb\u5316\uff0c\u5c42\u5c42\u9012\u51fa\u6700\u540e\u5230 main \u5305\u3002\u4e0d\u7ba1\u5305\u88ab\u5bfc\u5165\u591a\u5c11\u6b21\uff0c\u5305\u5185\u7684 init \u51fd\u6570\u53ea\u4f1a\u6267\u884c\u4e00\u6b21\u3002\u5e94\u7528\u521d\u59cb\u5316\u65f6\u521d\u59cb\u5316\u5de5\u4f5c\u7684\u987a\u5e8f\u662f\uff0c\u4ece\u88ab\u5bfc\u5165\u7684\u6700\u6df1\u5c42\u5305\u5f00\u59cb\u8fdb\u884c\u521d\u59cb\u5316\uff0c\u5c42\u5c42\u9012\u51fa\u6700\u540e\u5230 main \u5305\u3002\u4f46\u5305\u7ea7\u522b\u53d8\u91cf\u7684\u521d\u59cb\u5316\u5148\u4e8e\u5305\u5185 init \u51fd\u6570\u7684\u6267\u884c\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5\u3001Go \u4e2d uintptr \u548c unsafe.Pointer \u7684\u533a\u522b\uff1f<\/h3>\n\n\n\n<p>\u7b54\uff1aunsafe.Pointer \u662f\u901a\u7528\u6307\u9488\u7c7b\u578b\uff0c\u5b83\u4e0d\u80fd\u53c2\u4e0e\u8ba1\u7b97\uff0c\u4efb\u4f55\u7c7b\u578b\u7684\u6307\u9488\u90fd\u53ef\u4ee5\u8f6c\u5316\u6210 unsafe.Pointer\uff0cunsafe.Pointer \u53ef\u4ee5\u8f6c\u5316\u6210\u4efb\u4f55\u7c7b\u578b\u7684\u6307\u9488\uff0cuintptr \u53ef\u4ee5\u8f6c\u6362\u4e3a unsafe.Pointer\uff0cunsafe.Pointer \u53ef\u4ee5\u8f6c\u6362\u4e3a uintptr\u3002uintptr \u662f\u6307\u9488\u8fd0\u7b97\u7684\u5de5\u5177\uff0c\u4f46\u662f\u5b83\u4e0d\u80fd\u6301\u6709\u6307\u9488\u5bf9\u8c61\uff08\u610f\u601d\u5c31\u662f\u5b83\u8ddf\u6307\u9488\u5bf9\u8c61\u4e0d\u80fd\u4e92\u76f8\u8f6c\u6362\uff09\uff0cunsafe.Pointer \u662f\u6307\u9488\u5bf9\u8c61\u8fdb\u884c\u8fd0\u7b97\uff08\u4e5f\u5c31\u662f uintptr\uff09\u7684\u6865\u6881\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6\u3001golang\u5171\u4eab\u5185\u5b58\uff08\u4e92\u65a5\u9501\uff09\u65b9\u6cd5\u5b9e\u73b0\u53d1\u9001\u591a\u4e2aget\u8bf7\u6c42<\/h3>\n\n\n\n<p>\u5f85\u8865\u5145<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">7\u3001\u4ece\u6570\u7ec4\u4e2d\u53d6\u4e00\u4e2a\u76f8\u540c\u5927\u5c0f\u7684slice\u6709\u6210\u672c\u5417\uff1f<\/h3>\n\n\n\n<p>\u6216\u8005\u8fd9\u4e48\u95ee\uff1a\u4ece\u5207\u7247\u4e2d\u53d6\u4e00\u4e2a\u76f8\u540c\u5927\u5c0f\u7684\u6570\u7ec4\u6709\u6210\u672c\u5417\uff1f<\/p>\n\n\n\n<p>\u8fd9\u662f\u7231\u7acb\u4fe1\u7684\u4e8c\u9762\u9898\u76ee\uff0c\u8fd9\u4e2a\u95ee\u9898\u6211\u81f3\u4eca\u8fd8\u6ca1\u641e\u61c2\uff0c\u4e0d\u77e5\u9053\u4ece\u4ec0\u4e48\u5207\u5165\u70b9\u53bb\u5206\u6790\uff0c\u6b22\u8fce\u6307\u6559\u3002<\/p>\n\n\n\n<p>PS\uff1a\u7231\u7acb\u4fe1\u9762\u8bd5\u90fd\u8981\u82f1\u6587\u81ea\u6211\u4ecb\u7ecd\uff0c\u4ee5\u53ca\u95ee\u7b54\uff0c\u5982\u679c\u82f1\u6587\u56de\u7b54\u4e0d\u4e0a\u6765\uff0c\u4f1a\u76f4\u63a5\u5207\u6362\u6210\u4e2d\u6587\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u524d\u8a00 1\u3001\u7533\u660e \u6587\u7ae0\u90e8\u5206\u9898\u76ee\u6765\u6e90\u4e8e\u7f51\u7edc\uff0c\u7b54\u6848\u7cfb\u4e2a\u4eba\u7ed3\u54085\u6708\u4efd\u9762\u8bd5\u4e86\u8fd130\u5bb6\u516c\u53f8\u6574\u7406\u6240\u5f97\uff0c\u6700\u540e\u9644\u5f55\u53c2\u8003\u539f\u6587\u94fe\u63a5\uff0c\u5982\u6709\u9057\u6f0f\u7684\u539f\u6587\u51fa\u5904\u8bf7\u8054\u7cfb\u672c\u4eba\u3002\u4e0d\u5bf9\u4e4b\u5904\u671b\u6279\u8bc4\u6307\u6b63\uff0c\u7b54\u6848\u9700\u8981\u52a0\u4e0a\u81ea\u5df1\u7684\u601d\u8003\uff0c\u6700\u597d\u662f\u4ee3\u7801\u5b9e\u8df5\u4e0b\u3002 \u53c2\u4e0e\u8fc7\u9762\u8bd5\u7684\u4f01\u4e1a\u6709\uff1azg\u4eba\u5bff\uff0c\u777f\u79d1lun,qi\u732b\uff0cyun\u6c49\u5546\u57ce\uff0czi\u8282\u8df3\u52a8\uff0c\u7279\u65afla\uff0c\u867eP\uff0cchuan\u97f3\uff0cqi\u5b89\u4fe1\uff0cai\u7acb\u4fe1\u7b49\u5927\u5927\u5c0f\u5c0f\u4f01\u4e1a\u8fd130\u5bb6\uff0cBAT\u7b80\u5386\u90fd\u8fc7\u4e0d\u4e86\u3002 2\u3001\u9762\u8bd5\u5efa\u8bae \u6280\u672f\u90e8\u5206 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