{"id":149039,"date":"2020-08-15T01:31:52","date_gmt":"2020-08-14T17:31:52","guid":{"rendered":"http:\/\/4563.org\/?p=149039"},"modified":"2020-08-15T01:31:52","modified_gmt":"2020-08-14T17:31:52","slug":"%e5%ae%9e%e6%88%98-perfdog-%e4%bc%98%e5%8c%96%e5%b0%8f%e6%b8%b8%e6%88%8f%e6%80%a7%e8%83%bd","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=149039","title":{"rendered":"\u5b9e\u6218 PerfDog \u4f18\u5316\u5c0f\u6e38\u620f\u6027\u80fd"},"content":{"rendered":"<div>\n<div>\n<div>\n<h1>                  \u5b9e\u6218 PerfDog \u4f18\u5316\u5c0f\u6e38\u620f\u6027\u80fd               <\/h1>\n<p> <\/p>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : ld11620967 <\/span>  <span><i><\/i> 12<\/span> <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div isfirst=\"1\"> <\/p>\n<p>\u80cc\u666f\uff1a \u6211\u4eec\u7684\u5f15\u64ce\u662f Egret,\u4f7f\u7528\u7684\u662f\u539f\u751f\u7684 EUI\uff0c\u8f6c\u5fae\u4fe1\u5c0f\u6e38\u620f\uff1b \u5de5\u7a0b\u7b2c\u4e00\u7248\u51fa\u6765\u540e\u4f7f\u7528 PerfDog \u6d4b\u8bd5\u4e00\u6ce2\u6570\u636e\u3002\u7ed3\u679c\u53d1\u73b0\u5f88\u591a\u95ee\u9898\uff0c\u672c\u6587\u4e3b\u8981\u5206\u4e24\u90e8\u5206<\/p>\n<p>\u7b2c\u4e00\u90e8\u5206\u4e3b\u8981\u4ecb\u7ecd\u901a\u8fc7 PerfDog \u53d1\u73b0\u95ee\u9898\uff0c \u7b2c\u4e8c\u90e8\u5206\u4e3b\u8981\u4ecb\u7ecd\u901a\u8fc7 PerfDog \u7684\u6570\u636e\u5b9a\u4f4d\u5e76\u89e3\u51b3\u95ee\u9898\u3002 PerfDog \u5177\u4f53\u64cd\u4f5c\u53ef\u4ee5\u770b\u6587\u6863 PerfDog \u4f7f\u7528\u8bf4\u660e<\/p>\n<p>\u7b2c\u4e00\u90e8\u5206\u2014\u2014\u2014\u2014\u6570\u636e\u5206\u6790 \u672c\u6b21\u7684\u6848\u4f8b\u591a\u89c1\u4e8e\u6e38\u620f\u7b2c\u4e00\u7248\u65f6\u7684\u60c5\u51b5\uff0c\u6bd4\u8f83\u5e38\u89c1\uff0c\u6240\u4ee5\u62ff\u51fa\u6765\u505a\u4e2a\u5206\u6790\u3002 \u8fd9\u91cc\u5f3a\u8c03\u4e00\u70b9\u3002\u5206\u6790\u95ee\u9898\u9700\u8981\u6574\u4f53\u6570\u636e\u8054\u52a8\u5206\u6790\uff0c\u5355\u72ec\u770b\u67d0\u5355\u4e00\u4fe1\u606f\u662f\u6ca1\u662f\u610f\u4e49\u7684<\/p>\n<p>\u7b2c\u4e00\u6b21\u6d4b\u8bd5\u6570\u636e FPS\uff1a https:\/\/imgchr.com\/i\/dcUgKS \u5185\u5b58\uff1a https:\/\/imgchr.com\/i\/dcU2Dg CPU\uff1a https:\/\/imgchr.com\/i\/dcURbQ \u7ed3\u8bba\uff1a<\/p>\n<p>1.\u6211\u4eec\u53d1\u73b0\u5728\u6218\u6597\u65f6 FPS \u6ce2\u52a8\u8f83\u5927 2.\u5185\u5b58\u5448\u73b0\u6301\u7eed\u4e0a\u5347\u7684\u8d8b\u52bf 3.CPU \u7684 APP Usage \u592a\u5c0f\uff0c\u4ec5\u5360 1%\u5de6\u53f3<\/p>\n<p>\u9996\u5148\u9488\u5bf9\u95ee\u9898 3 \u7684\u8bf4\u660e\uff1a \u6211\u4e4b\u524d\u9009\u62e9\u6d4b\u8bd5\u7684\u662f\u5fae\u4fe1 app\uff0c\u800c\u5c0f\u6e38\u620f\u662f\u4f5c\u4e3a\u5b50\u8fdb\u7a0b\u800c\u5b58\u5728\u7684\uff0c\u6240\u4ee5\u5e94\u8be5\u9009\u62e9 PerfDog \u7684\u5b50\u8fdb\u7a0b\u8fdb\u884c\u6d4b\u8bd5\uff0c\u8fd9\u6837\u5f97\u5230\u7684\u6570\u636e\u4f1a\u66f4\u52a0\u7684\u7cbe\u51c6\uff1b\u4e0b\u56fe\u7684\u6df1\u8272\u8fdb\u7a0b\u8868\u793a\u6b63\u5728\u8fd0\u884c\u7684\u9876\u5c42\u8fdb\u7a0b<\/p>\n<p>\u9488\u5bf9\u8fd9\u79cd\u591a\u8fdb\u7a0b\u7684\u5e94\u7528\u6d4b\u8bd5\uff1a<\/p>\n<p>iOS \u5e73\u53f0\uff0cAPP \u591a\u8fdb\u7a0b\u5206\u4e3a APP Extension \u548c\u7cfb\u7edf XPC Server \u3002 \u6bd4\u5982\uff1a\u67d0\u7535\u7ade\u76f4\u64ad\u8f6f\u4ef6\u7528\u5230 APP Extension \u6269\u5c55\u8fdb\u7a0b(\u6269\u5c55\u8fdb\u7a0b\u540d LABroadcastUpload)\u3002\u5f53\u7136\u4e5f\u53ef\u80fd\u7528\u5230\u7cfb\u7edf XPC Server \u670d\u52a1\u8fdb\u7a0b\uff0c\u5982\u4e00\u822c web \u6d4f\u89c8\u5668\u4f1a\u7528\u5230 webkit \u3002<\/p>\n<p>Android \u5e73\u53f0\uff0c\u4e00\u822c\u5927\u578b APP\uff0c\u6bd4\u5982\u6e38\u620f\u6709\u65f6\u5019\u662f\u591a\u8fdb\u7a0b\u534f\u4f5c\u8fd0\u884c\uff08\u5fae\u4fe1\u5c0f\u6e38\u620f\uff0c\u5fae\u89c6\u7b49 APP \u53ca\u738b\u8005\u8363\u8000\u7b49\u6e38\u620f\u591a\u5b50\u8fdb\u7a0b\uff09\uff0c\u53ef\u9009\u62e9\u76ee\u6807\u5b50\u8fdb\u7a0b\u8fdb\u884c\u9488\u5bf9\u6027\u6d4b\u8bd5\u3002\u9ed8\u8ba4\u662f\u4e3b\u8fdb\u7a0b\u3002\u5982\u56fe\u738b\u8005\u8363\u8000 https:\/\/imgchr.com\/i\/dcaEad https:\/\/imgchr.com\/i\/dcaVIA \u8be6\u7ec6\u7684\u4f7f\u7528\u8bf4\u660e\u53ef\u4ee5\u770b\u8fd9\u91cc\uff1aPerfDog \u4f7f\u7528\u8bf4\u660e\u4e66<\/p>\n<p>\u4e3a\u4e86\u5224\u65ad\u662f\u4ec0\u4e48\u5bfc\u81f4\u7684 FPS \u6ce2\u52a8\u8f83\u5927\uff0c\u4e5f\u4e3a\u4e86\u5224\u65ad\u662f\u5426\u5b58\u5728 OOM\uff0c\u73b0\u5728\u6211\u4eec\u6765\u9009\u62e9\u5b50\u8fdb\u7a0b\u8fdb\u884c\u7b2c\u4e8c\u6b21\u6d4b\u8bd5\uff1b https:\/\/imgchr.com\/i\/dcaePI<\/p>\n<p>\u7b2c\u4e8c\u6b21\u6d4b\u8bd5\u6570\u636e \u6d4b\u8bd5\u6570\u636e\u7ec4\u6210\uff1a \u4e3a\u4e86\u9a8c\u8bc1\u6211\u7684\u4e00\u4e9b\u731c\u60f3\uff0c\u4e5f\u4e3a\u4e86\u66f4\u7ec6\u81f4\u7684\u5b9a\u4f4d\u95ee\u9898\uff0c\u6211\u4eec\u5728\u6d4b\u8bd5\u8fc7\u7a0b\u4e2d\u505a\u4e86\u4e00\u4e9b\u7279\u6b8a\u64cd\u4f5c\uff1a<\/p>\n<p>1.\u6218\u6597\u6302\u673a [\u4e3a\u4e86\u5224\u65ad\u662f\u5426\u662f\u6218\u6597\u8fc7\u7a0b\u4e2d\u89e6\u53d1\u7684\u5185\u5b58\u6cc4\u9732] 2.\u53cd\u590d\u6253\u5f00\u5173\u95ed UI [\u4e3a\u4e86\u5224\u65ad UI \u521b\u5efa\u4e0e\u9500\u6bc1\u662f\u5426\u5b58\u5728\u5185\u5b58\u6cc4\u9732] 3.\u9759\u6b62\u5728\u67d0\u4e00 UI \u9875\u9762 [\u4e3a\u4e86\u4e0e\u5176\u4ed6\u573a\u666f\u4f5c\u533a\u5206] 4.\u606f\u5c4f\u6302\u673a [\u4e3a\u4e86\u5224\u65ad\u662f\u5426\u662f\u7531\u56fe\u50cf\u8d44\u6e90\u5f15\u8d77\u7684\u5185\u5b58\u6cc4\u9732\u8fd8\u662f\u4ee3\u7801\u8d44\u6e90\u5f15\u8d77\u7684\u6cc4\u9732] FPS \u6570\u636e\uff1a https:\/\/imgchr.com\/i\/dcamGt<\/p>\n<p>CPU \u6570\u636e\uff1a<\/p>\n<p>https:\/\/imgchr.com\/i\/dcauxf \u5185\u5b58\u6570\u636e\uff1a https:\/\/imgchr.com\/i\/dcaWQK GPU \u538b\u529b\u5c71\u5927<\/p>\n<p>https:\/\/imgchr.com\/i\/dcahLD FPS \u4e0e GPU \u5206\u6790\uff1a<\/p>\n<p>\u6211\u4eec\u901a\u8fc7 FPS \u6570\u636e\u53d1\u73b0\u5728\u6e38\u620f\u8fc7\u7a0b Jank \u5341\u5206\u4e25\u91cd\uff0cFPS \u6ce2\u52a8\u8fc7\u4e8e\u5267\u70c8\uff0c\u5c24\u5176\u662f\u96c6\u4e2d\u5728 UI \u5f00\u542f\u6216\u8005\u5173\u95ed\u7684\u65f6\u5019\uff0c\u6e38\u620f\u6765\u8bf4\uff0c\u6e32\u67d3\u753b\u9762\uff0c\u76f8\u5bf9\u6765\u8bf4 GPU \u53ef\u80fd\u51fa\u73b0\u74f6\u9888\uff0c\u9010\u5bf9 GPU \u8fdb\u884c\u67e5\u770b\uff0c\u8fd9\u4e2a\u65f6\u5019\u6211\u4eec\u8fdb\u884c\u6570\u636e\u6392\u67e5\u53d1\u73b0 GPU \u7684\u4f7f\u7528\u7387\u4e5f\u53d8\u5f97\u5f02\u5e38\u9ad8\uff0c\u5f88\u660e\u663e\u6e32\u67d3\u7684\u538b\u529b\u5f88\u5927\uff0c\u800c\u6211\u4eec\u6e38\u620f UI \u6253\u5f00\u65f6\u5b9e\u9645\u4e0a\u6218\u6597\u4e5f\u4f1a\u88ab\u6e32\u67d3\uff0c\u8fd9\u548c\u6211\u4eec\u6e38\u620f\u7684\u8bbe\u8ba1\u6709\u5173\uff0c\u6240\u4ee5\u6e32\u67d3\u7684\u538b\u529b\u5f88\u5927\u3002<\/p>\n<p>\u5185\u5b58\u5206\u6790\uff1a https:\/\/imgchr.com\/i\/dca5ee<\/p>\n<p>\u6211\u4eec\u901a\u8fc7 PerfDog \u7684\u6570\u636e\u53d1\u73b0\u5185\u5b58\u662f\u5448\u73b0\u4e00\u76f4\u4e0a\u5347\u7684\u72b6\u6001\uff0c\u8fd9\u6837\u4e0b\u53bb\u6700\u7ec8\u7684\u7ed3\u679c\u5c31\u662f\u88ab System Kill \u6389\u3002\u5176\u5b9e\u73b0\u5728\u5df2\u7ecf\u53ef\u4ee5\u786e\u5b9a\u662f\u53d1\u751f\u4e86\u5185\u5b58\u6cc4\u9732\uff0c\u5728 72 \u5206\u949f\u7684\u65f6\u95f4\u91cc\u5185\u5b58\u4ece 726M \u5230\u4e86 956M\uff0c\u800c\u4e14\u8fd8\u5728\u4e0d\u65ad\u4e0a\u5347\uff1b<\/p>\n<p>\u8fd9\u91cc\u989d\u5916\u8bf4\u4e0b\uff0c\u770b\u662f\u5426\u5b58\u5728 OOM \u4e0d\u80fd\u53ea\u770b PSS \uff08 PerfDog \u9ed8\u8ba4\u7684 memory \u662f PSS \uff09\uff0c\u540c\u6837\u8981\u6ce8\u610f VSS\uff0c\u6709\u7684\u6e38\u620f\u53ef\u80fd\u4f1a\u5b58\u5728 PSS \u4e00\u822c\u5927\u5c0f\uff0cVSS \u4e0d\u65ad\u589e\u5927\u7684\u60c5\u51b5\uff0c\u8fd9\u4e5f\u662f\u4e0d\u79d1\u5b66\u7684\u3002 \u7b80\u5355\u5206\u4eab\u4e0b\u5e38\u89c1\u5185\u5b58\u6307\u6807\u5173\u7cfb<\/p>\n<p>\u5185\u5b58\u8017\u7528 VSS &#8211; Virtual Set Size \u865a\u62df\u8017\u7528\u5185\u5b58\uff08\u5305\u542b\u5171\u4eab\u5e93\u5360\u7528\u7684\u5185\u5b58\uff09 RSS &#8211; Resident Set Size \u5b9e\u9645\u4f7f\u7528\u7269\u7406\u5185\u5b58\uff08\u5305\u542b\u5171\u4eab\u5e93\u5360\u7528\u7684\u5185\u5b58\uff09 PSS &#8211; Proportional Set Size \u5b9e\u9645\u4f7f\u7528\u7684\u7269\u7406\u5185\u5b58\uff08\u6bd4\u4f8b\u5206\u914d\u5171\u4eab\u5e93\u5360\u7528\u7684\u5185\u5b58\uff09 USS &#8211; Unique Set Size \u8fdb\u7a0b\u72ec\u81ea\u5360\u7528\u7684\u7269\u7406\u5185\u5b58\uff08\u4e0d\u5305\u542b\u5171\u4eab\u5e93\u5360\u7528\u7684\u5185\u5b58\uff09 \u4e00\u822c\u6765\u8bf4\u5185\u5b58\u5360\u7528\u5927\u5c0f\u6709\u5982\u4e0b\u89c4\u5f8b\uff1aVSS &gt;= RSS &gt;= PSS &gt;= USS<\/p>\n<p>\u8fd9\u91cc\u518d\u7a0d\u5fae\u4ecb\u7ecd\u4e0b\u5b89\u5353\u7684 LMK \uff08 Low memory killer \uff09,\u8be6\u7ec6\u4fe1\u606f\u5c31\u4e0d\u591a\u8d58\u8ff0\u4e86\u3002<\/p>\n<p>1.Android \u7cfb\u7edf \u4f1a\u5b9a\u65f6\u6267\u884c\u4e00\u6b21\u68c0\u67e5\uff0c\u5185\u5b58\u8fbe\u5230\u67d0\u4e2a\u503c\u540e\uff0c\u5c31\u4f1a\u6740\u6b7b\u76f8\u5e94\u7684\u8fdb\u7a0b\uff0c\u91ca\u653e\u6389\u5185\u5b58\u3002 2.\u6bcf\u4e2a\u7a0b\u5e8f\u90fd\u4f1a\u6709\u4e00\u4e2a oom_adj \u503c\uff0c\u8fd9\u4e2a\u503c\u8d8a\u5c0f\uff0c\u7a0b\u5e8f\u8d8a\u91cd\u8981\uff0c\u88ab\u6740\u7684\u53ef\u80fd\u6027\u8d8a\u4f4e 3.Low memory killer \u4e3b\u8981\u662f\u901a\u8fc7\u8fdb\u7a0b\u7684 oom_adj \u6765\u5224\u5b9a\u8fdb\u7a0b\u7684\u91cd\u8981\u7a0b\u5ea6\u3002oom_adj \u7684\u5927\u5c0f\u548c\u8fdb\u7a0b\u7684\u7c7b\u578b\u4ee5\u53ca\u8fdb\u7a0b\u88ab\u8c03\u5ea6\u7684\u6b21\u5e8f\u6709\u5173 4.\u9608\u503c\u8868\u53ef\u4ee5\u901a\u8fc7 \/sys\/module\/lowmemorykiller\/parameters\/adj \u548c \/sys\/module\/lowmemorykiller\/parameters\/minfree \u8fdb\u884c\u914d\u7f6e<\/p>\n<p>\u73b0\u5728\u7efc\u5408\u4e24\u6b21\u6d4b\u8bd5\u6570\u636e\u5f97\u51fa\u7ed3\u8bba<\/p>\n<p>\u7ed3\u8bba\uff1a 1.FPS \u6ce2\u52a8\u8fc7\u4e8e\u5267\u70c8\uff0c\u5f88\u4e0d\u7a33\u5b9a\uff0c\u5c24\u5176\u662f\u5728 uI \u521b\u5efa\u4e0e\u5173\u95ed\u65f6\u5019\uff1b 2.\u5b58\u5728\u5185\u5b58\u6cc4\u9732\uff0c\u7531\u4e8e\u4e0d\u7ba1\u4ec0\u4e48\u64cd\u4f5c\u5185\u5b58\u90fd\u4e00\u76f4\u6da8\uff0c\u5927\u6982\u7387\u662f\u516c\u5171\u7ec4\u4ef6\u90e8\u5206\u5f15\u8d77\u7684 3.\u5176\u5b9e\u8fd8\u6709\u4e00\u4e9b\u5176\u4ed6\u5c0f\u95ee\u9898\uff0c\u4e0d\u8fc7\u4f18\u5148\u89e3\u51b3\u8fd9\u4e24\u4e2a<\/p>\n<p>\u7b2c\u4e8c\u90e8\u5206\u2014\u2014\u2014\u2014\u95ee\u9898\u5b9a\u4f4d \u5185\u5b58\u6cc4\u9732\u95ee\u9898\u5206\u6790 \u6709\u4e86 PerfDog \u4ee5\u4e0a\u7684\u6570\u636e\uff0c\u63a5\u4e0b\u6765\u6211\u4eec\u5c31\u8981\u5f00\u59cb\u5b9a\u4f4d\u6392\u67e5\u95ee\u9898\u5566\uff0c<\/p>\n<p>\u9879\u76ee\u5c40\u90e8\u67b6\u6784\uff1a https:\/\/imgchr.com\/i\/dcaIdH 1.\u6211\u4eec\u7684\u9879\u76ee\u7684\u57fa\u7840\u67b6\u6784\u662f\u6240\u6709\u7684\u57fa\u7840\u529f\u80fd\u90fd\u8c03\u7528\u7684\u540c\u4e00\u4efd\u57fa\u7840 class \uff08\u7956\u4f20\u4ee3\u7801\uff09\uff0c\u4f8b\u5982\u901a\u4fe1\u7c7b\u7b49\u7b49\uff1b 2.\u6211\u4eec\u53d1\u73b0\u5185\u5b58\u5728\u4e00\u76f4\u4e0a\u5347\uff0c\u65e0\u8bba\u662f\u89d2\u8272\u5728\u4ec0\u4e48\u73af\u5883\u4e0b\uff0c\u751a\u81f3\u662f\u5728\u606f\u5c4f\u7684\u65f6\u5019\u5185\u5b58\u4e5f\u5728\u4e0a\u5347\uff0c\u90a3\u4e48\u6211\u4eec\u5176\u5b9e\u53ef\u4ee5\u5927\u6982\u7387\u5b9a\u4f4d\u662f\u9879\u76ee\u5185\u90e8\u7684\u57fa\u7840 class \u5185\u90e8\u51fa\u4e86\u95ee\u9898\uff1b<\/p>\n<p>\u63a5\u4e0b\u6765\u5f00\u59cb\u7ec6\u7ec6\u6392\u67e5\uff1b<\/p>\n<p>\u5185\u5b58\u6cc4\u9732\u6392\u67e5 \u9996\u5148\u8981\u5148\u4e86\u89e3\u4e00\u4e9b JS \u7684\u5185\u5b58\u7ba1\u7406\u673a\u5236<\/p>\n<p>\u56de\u6536\u673a\u5236 JS \u4e2d\u5185\u5b58\u7684\u5206\u914d\u548c\u56de\u6536\u90fd\u662f VM \u81ea\u52a8\u5b8c\u6210\u7684\uff0c\u4e0d\u9700\u8981\u50cf C\/C++\u4e3a\u6bcf\u4e00\u4e2a new\/malloc \u64cd\u4f5c\u53bb\u5199\u914d\u5bf9\u7684 delete\/free \u4ee3\u7801\uff0cJS \u5f15\u64ce\u4e2d\u5bf9\u53d8\u91cf\u7684\u5b58\u50a8\u4e3b\u8981\u662f\u5728\u6808\u5185\u5b58\uff0c\u5806\u5185\u5b58\u3002\u5185\u5b58\u6cc4\u6f0f\u7684\u5b9e\u8d28\u662f\u4e00\u4e9b\u5bf9\u8c61\u51fa\u73b0\u610f\u5916\u800c\u6ca1\u6709\u88ab\u56de\u6536\uff0c\u800c\u662f\u5e38\u9a7b\u5185\u5b58\u3002 GC \u539f\u7406 JavaScript \u865a\u62df\u673a\u6709\u4e00\u4e2a\u7279\u70b9\uff0c\u5c31\u662f\u5bf9\u8c61\u521b\u5efa\u7684\u5f00\u9500\u8fdc\u8fdc\u5927\u4e8e\u5bf9\u8c61\u8ba1\u7b97\u7684\u5f00\u9500\uff0c\u5e76\u4e14\u5bf9\u8c61\u521b\u5efa\u4f1a\u5bfc\u81f4\u5783\u573e\u56de\u6536\uff0c\u800c\u5783\u573e\u56de\u6536\u4f1a\u5bfc\u81f4\u6e38\u620f\u4e0d\u5b9a\u671f\u5361\u987f\u3002 \u5728\u5806\u4e2d\u67e5\u770b\u65e0\u7528\u7684\u5bf9\u8c61\uff0c\u628a\u8fd9\u4e9b\u5bf9\u8c61\u5360\u7528\u7684\u5185\u5b58\u7a7a\u95f4\u8fdb\u884c\u56de\u6536\u3002\u6d4f\u89c8\u5668\u4e0a\u7684 GC(Gabage Collection \u5783\u573e\u56de\u6536)\u5b9e\u73b0\uff0c\u5927\u591a\u662f\u91c7\u7528\u53ef\u8fbe\u6027\u7b97\u6cd5\uff0c\u5173\u4e8e\u53ef\u8fbe\u6027\u7684\u5bf9\u8c61\uff0c\u4fbf\u662f\u80fd\u4e0e GC Roots \u6784\u6210\u8fde\u901a\u56fe\u7684\u5bf9\u8c61\u3002\u5f53\u4e00\u4e2a\u5bf9\u8c61\u5230 GC Roots \u6ca1\u6709\u4efb\u4f55\u5f15\u7528\u94fe\u65f6\uff0c\u5219\u4f1a\u6210\u4e3a\u5783\u573e\u56de\u6536\u5668\u7684\u76ee\u6807\uff0c\u7cfb\u7edf\u4f1a\u5728\u5408\u9002\u7684\u65f6\u5019\u56de\u6536\u5b83\u6240\u5360\u7684\u5185\u5b58\u3002<\/p>\n<p>\u6211\u8fd9\u91cc\u4f7f\u7528\u7684\u8c37\u6b4c\u6d4f\u89c8\u5668\u7684 Head Profiling,\u6216\u8005\u4f60\u4e5f\u53ef\u4ee5\u4f7f\u7528\u767d\u9e6d\u5f15\u64ce\u7684 profiler\uff1a \u4f7f\u7528\u5f88\u7b80\u5355:<\/p>\n<p>1.\u6253\u5f00 Google \u6d4f\u89c8\u5668\uff0c\u6253\u5f00\u8981\u76d1\u63a7\u7684\u7f51\u9875\uff0cwin \u4e0b\u6309 F12 \u5f39\u51fa\u5f00\u53d1\u8005\u5de5\u5177 2.\u5207\u6362\u5230 Memory\uff0c\u9009\u62e9\u5806\u7c7b\u578b\uff0c\u9009\u4e2d Take Heap SnapShot \u5f00\u59cb\u8fdb\u884c\u5feb\u7167 3.\u53f3\u8fb9\u7684\u89c6\u56fe\u5217\u51fa\u4e86 heap \u91cc\u7684\u5bf9\u8c61\u5217\u8868\uff0c\u70b9\u51fb\u5bf9\u8c61\u53ef\u4ee5\u770b\u5230\u5bf9\u8c61\u7684\u5f15\u7528\u5c42\u7ea7\u5173\u7cfb 4.\u8fdb\u5165\u6e38\u620f\u540e\u62cd\u4e0b\u5feb\u7167\uff0c\u6253\u5f00\u67d0\u4e2a\u754c\u9762\uff0c\u5173\u95ed\u754c\u9762\uff0c\u62cd\u4e0b\u5feb\u7167 5.\u5c06\u65b0\u7684\u5feb\u7167\u8f6c\u6362\u5230 Comparsion \u5bf9\u6bd4\u89c6\u56fe\uff0c\u8fdb\u884c\u5185\u5b58\u5bf9\u6bd4\u5206\u6790 \u9700\u8981\u989d\u5916\u6ce8\u610f\u7684\u662f\uff1a \u6bcf\u6b21\u62cd\u5feb\u7167\u524d\uff0c\u90fd\u4f1a\u5148\u81ea\u52a8\u6267\u884c\u4e00\u6b21 GC\uff0c\u4fdd\u8bc1\u89c6\u56fe\u91cc\u7684\u5bf9\u8c61\u90fd\u662f root \u53ef\u53ca\u7684\u3002GC \u7684\u89e6\u53d1\u662f\u4f9d\u8d56\u6d4f\u89c8\u5668\u7684\uff0c\u6240\u4ee5\u4e0d\u80fd\u901a\u8fc7\u65f6\u65f6\u89c2\u5bdf\u5185\u5b58\u5cf0\u503c\u800c\u5224\u65ad\u662f\u5426\u6709\u5185\u5b58\u6cc4\u6f0f\u3002<\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u6bcf\u9694\u4e00\u6bb5\u65f6\u95f4\u6765\u62cd\u4e00\u6b21\u5feb\u7167\uff08\u7531\u4e8e\u516c\u53f8\u9879\u76ee\u539f\u56e0\uff0c\u6211\u5c31\u4e0d\u5c55\u793a\u771f\u5b9e\u9879\u76ee\u4e86\uff0c\u6b64\u5904\u4ec5\u4f5c\u4e3a\u6559\u5b66\uff09\uff1a<\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u6253\u5f00\u8c37\u6b4c\u6d4f\u89c8\u5668\u7684\u5185\u5b58\u5206\u6790\u5de5\u5177\u540e\u6709\u4e09\u4e2a\u9009\u9879,\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u81ea\u5df1\u7684\u8c03\u8bd5\u65b9\u5f0f\u4ea4\u66ff\u4f7f\u7528\uff1b<\/p>\n<p>1.Heap snapshot &#8211; \u7528\u4ee5\u6253\u5370\u5806\u5feb\u7167\uff0c\u5806\u5feb\u7167\u6587\u4ef6\u663e\u793a\u9875\u9762\u7684 javascript \u5bf9\u8c61\u548c\u76f8\u5173 DOM \u8282\u70b9\u4e4b\u95f4\u7684\u5185\u5b58\u5206\u914d 2.Allocation instrumentation on timeline &#8211; \u5728\u65f6\u95f4\u8f74\u4e0a\u8bb0\u5f55\u5185\u5b58\u4fe1\u606f\uff0c\u968f\u7740\u65f6\u95f4\u53d8\u5316\u8bb0\u5f55\u5185\u5b58\u4fe1\u606f\u3002 3.Allocation sampling &#8211; \u5185\u5b58\u4fe1\u606f\u91c7\u6837\uff0c\u4f7f\u7528\u91c7\u6837\u7684\u65b9\u6cd5\u8bb0\u5f55\u5185\u5b58\u5206\u914d\u3002\u6b64\u914d\u7f6e\u6587\u4ef6\u7c7b\u578b\u5177\u6709\u6700\u5c0f\u7684\u6027\u80fd\u5f00\u9500\uff0c\u53ef\u7528\u4e8e\u957f\u65f6\u95f4\u8fd0\u884c\u7684\u64cd\u4f5c\u3002\u5b83\u63d0\u4f9b\u4e86\u7531 javascript \u6267\u884c\u5806\u6808\u7ec6\u5206\u7684\u826f\u597d\u8fd1\u4f3c\u503c\u5206\u914d\u3002 https:\/\/imgchr.com\/i\/dcdtTH<\/p>\n<p>\u8fd9\u91cc\u4e3e\u4f8b\u4f7f\u7528\u5806\u5feb\u7167\u5206\u6790\uff0c https:\/\/imgchr.com\/i\/dcdatA \u53f3\u4fa7\u67e5\u770b\u8be6\u7ec6\u4fe1\u606f https:\/\/imgchr.com\/i\/dcd0pt \u53ef\u89c1 rect \u5bf9\u8c61\u4e00\u76f4\u5728\u589e\u9ad8\uff0c\u90a3\u4e48\u6211\u4eec\u53ef\u4ee5\u67e5\u770b\u4e00\u4e0b\u5bfc\u81f4 rect \u5bf9\u8c61\u672a\u88ab\u91ca\u653e\u7684\u539f\u56e0\uff1a https:\/\/imgchr.com\/i\/dcdD6f \u662f\u7531\u4e8e Rect \u5bf9\u8c61\u4e2d\u5b58\u5728\u4e00\u4e2a\u5c5e\u6027 rect \u4e00\u76f4\u88ab\u5f15\u7528\u5bfc\u81f4\u5185\u5b58\u65e0\u6cd5\u91ca\u653e\uff0c\u90a3\u4e48\u6211\u4eec\u5230\u4ee3\u7801\u5bf9\u5e94\u7684\u4f4d\u7f6e\u53bb\u627e\uff0c\u5c31\u53ef\u4ee5\u8f83\u5feb\u7684\u5b9a\u4f4d\u539f\u56e0\uff1b\u6700\u7ec8\u6211\u4eec\u53d1\u73b0\u662f\u56e0\u4e3a\u5728\u81ea\u5b9a\u4e49\u7684\u4e00\u4e2a\u5168\u5c40\u4e8b\u4ef6\u76d1\u542c\u5668\u4e2d\u5b9e\u4f8b\u5316\u4e86\u4e00\u4e2a\u5bf9\u8c61\uff0c\u4f46\u662f\u8fd9\u4e2a\u5bf9\u8c61\u7684\u4e00\u4e9b\u5c5e\u6027\u4f1a\u6301\u7eed\u88ab\u8fd9\u4e2a\u4e8b\u4ef6\u76d1\u542c\u5668\u6240\u5f15\u7528\u800c\u4e0d\u4f1a\u88ab\u56de\u6536<\/p>\n<p>\u5f53\u7136\u4e3a\u4e86\u66f4\u5feb\u7684\u5b9a\u4f4d\u54ea\u4e2a\u51fd\u6570\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u4f7f\u7528 https:\/\/imgchr.com\/i\/dcdrX8 \u4e00\u822c\u7ed3\u679c\u662f\u8fd9\u4e2a\u6837\u5b50 https:\/\/imgchr.com\/i\/dcd60g<\/p>\n<p>Overview \u7684 HEAP(\u5806)\u66f2\u7ebf\u56fe\u8868\u793a JS \u5806\u3002 Call Stack \u901a\u5e38\u6765\u8bf4\uff0c\u5782\u76f4\u65b9\u5411\u5e76\u6ca1\u6709\u592a\u5927\u7684\u610f\u4e49\uff0c\u4ec5\u4ec5\u8868\u793a\u51fd\u6570\u5d4c\u5957\u6bd4\u8f83\u6df1\u800c\u5df2\uff0c\u4f46\u662f\u6a2a\u5411\u8868\u793a\u8c03\u7528\u65f6\u95f4\uff0c\u5982\u679c\u8c03\u7528\u65f6\u95f4\u592a\u957f\uff0c\u90a3\u4e48\u5c31\u9700\u8981\u4f18\u5316\u4f18\u5316\u4e86\u3002\u5f55\u5236\u7ed3\u679c\u7684\u8c03\u7528\u5806\u6808\uff0c\u6a2a\u5411\u8868\u793a\u65f6\u4f1a\u51fa\u73b0\u5e26\u6709\u66f4\u591a\u8be6\u60c5\u7684\u6d6e\u7a97\u95f4\uff0c\u5782\u76f4\u65b9\u5411\u8868\u793a\u8c03\u7528\u6808\uff0c\u4ece\u4e0a\u5f80\u4e0b\u8868\u793a\u51fd\u6570\u8c03\u7528\u3002\u6ed1\u52a8\u9f20\u6807\u6eda\u8f6e\u53ef\u4ee5\u67e5\u770b\u67d0\u6bb5\u65f6\u95f4\u7684\u8c03\u7528\u6808\u4fe1\u606f\u3002\u628a\u9f20\u6807\u653e\u5230 Call Stacks \u8c03\u7528\u6808\u7684\u67d0\u4e2a\u51fd\u6570\u4e0a\u9762\u53ef\u4ee5\u67e5\u770b\u51fd\u6570\u8be6\u7ec6\u4fe1\u606f\u3002\u8fd9\u4e2a\u4e00\u822c\u662f\u6027\u80fd\u4f18\u5316\u65f6\u5173\u6ce8\uff0c\u5bf9\u4e8e\u5185\u5b58\u6cc4\u6f0f\uff0c\u4e3b\u8981\u7528\u4e8e\u5e2e\u52a9\u5b9a\u4f4d\u8fdb\u884c\u4e86\u4ec0\u4e48\u64cd\u4f5c\u3002 Counter(\u8ba1\u6570\u5668)\u7a97\u683c\u3002\u5728\u8fd9\u91cc\u4f60\u53ef\u4ee5\u770b\u5230\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\uff08\u4e0e Overview(\u6982\u8ff0)\u7a97\u683c\u4e2d\u7684 HEAP(\u5806)\u66f2\u7ebf\u56fe\u76f8\u540c\uff09\uff0c\u5206\u522b\u663e\u793a\u4ee5\u4e0b\u5185\u5bb9\uff1aJS heap(JS \u5806)\uff0cdocuments(\u6587\u6863)\uff0cDOM nodes(DOM \u8282\u70b9)\uff0clisteners(\u4fa6\u542c\u5668)\u548c GPU memory(GPU \u5185\u5b58)\u3002\u52fe\u9009\u6216\u53d6\u6d88\u52fe\u9009\u590d\u9009\u6846\u53ef\u4ee5\u5c06\u5176\u4ece\u56fe\u8868\u4e2d\u663e\u793a\u6216\u9690\u85cf\u3002<\/p>\n<p>\u4e3b\u8981\u5173\u6ce8\u7b2c\u4e09\u4e2a\u7684 JS \u5806\u5185\u5b58\u3001\u8282\u70b9\u6570\u91cf\u3001\u76d1\u542c\u5668\u6570\u91cf\u3002\u9f20\u6807\u79fb\u5230\u66f2\u7ebf\u4e0a\uff0c\u53ef\u4ee5\u5728\u5de6\u4e0b\u89d2\u663e\u793a\u5177\u4f53\u6570\u636e\u3002\u8fd9\u4e9b\u6570\u636e\u82e5\u6709\u4e00\u4e2a\u5728\u6301\u7eed\u4e0a\u6da8\uff0c\u6ca1\u6709\u4e0b\u964d\u8d8b\u52bf\uff0c\u90fd\u6709\u53ef\u80fd\u662f\u6cc4\u6f0f\u3002 \u7531\u4e8e\u7bc7\u5e45\u539f\u56e0\uff0c\u8fd9\u91cc\u4e0d\u8fc7\u591a\u4ecb\u7ecd\u8fd9\u4e9b\u5de5\u5177\u7684\u4f7f\u7528\uff0c\u7f51\u4e0a\u6709\u5f88\u591a\u76f8\u5173\u6559\u7a0b\uff1b<\/p>\n<p>\u5361\u987f\u4f18\u5316 \u6211\u4eec\u901a\u8fc7 PerfDog \u7684\u6570\u636e\u53d1\u73b0 GPU \u538b\u529b\u5f88\u5927\uff0c\u6e38\u620f\u6765\u8bf4\uff0c\u6e32\u67d3\u753b\u9762\u4e45\u4e00\u822c\u662f drawcall \u8fc7\u591a\uff0c\u6216\u8005\u6bcf\u6b21 draw \u7684\u65f6\u95f4\u8f83\u957f\u3002 https:\/\/imgchr.com\/i\/dcd2kj \u800c\u6211\u4eec\u7684\u6e38\u620f\u5728\u67e5\u770b\u5728 drawcall 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