{"id":197416,"date":"2020-11-01T21:18:59","date_gmt":"2020-11-01T13:18:59","guid":{"rendered":"http:\/\/4563.org\/?p=197416"},"modified":"2020-11-01T21:18:59","modified_gmt":"2020-11-01T13:18:59","slug":"%e5%be%ae%e4%bf%a1%e5%b0%8f%e6%b8%b8%e6%88%8f%e7%9a%84%e5%86%85%e5%ad%98%e8%b0%83%e4%bc%98%e6%8c%87%e5%8d%97","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=197416","title":{"rendered":"\u5fae\u4fe1\u5c0f\u6e38\u620f\u7684\u5185\u5b58\u8c03\u4f18\u6307\u5357"},"content":{"rendered":"<div>\n<div>\n<div>\n<h1>                  \u5fae\u4fe1\u5c0f\u6e38\u620f\u7684\u5185\u5b58\u8c03\u4f18\u6307\u5357               <\/h1>\n<p> <\/p>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : ld11620967 <\/span>  <span><i><\/i> 7<\/span> <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div isfirst=\"1\"> <\/p>\n<p>\u5fae\u4fe1\u5c0f\u6e38\u620f\u5f00\u53d1\u3001\u6d4b\u8bd5\u3001\u73b0\u7f51\u4e09\u9636\u6bb5\u7684\u5185\u5b58\u8c03\u4f18\u5de5\u5177\u4f7f\u7528\u6307\u5357\uff1a<\/p>\n<p>\u5305\u542b\u5fae\u4fe1\u5f00\u53d1\u8005\u5de5\u5177\uff0c\u5fae\u4fe1 Android \u6027\u80fd\u9762\u677f\uff0cPerfDog\uff0c\u5c0f\u6e38\u620f\u4e91\u6d4b\u8bd5\u548c\u5c0f\u6e38\u620f\u6027\u80fd\u52a9\u624b\u7b49\u5de5\u5177\u3002<\/p>\n<ol>\n<li>\n<p>\u524d\u8a00 \u5728\u5f00\u53d1\u5fae\u4fe1\u5c0f\u6e38\u620f\u7684\u8fc7\u7a0b\u4e2d\uff0c\u5f00\u53d1\u8005\u5f80\u5f80\u4f1a\u9047\u5230\u5f88\u591a\u5185\u5b58\u95ee\u9898\uff0c\u5982\u5185\u5b58\u6cc4\u6f0f\u6216\u8005\u5185\u5b58\u6ea2\u51fa\u7b49\u3002\u5bf9\u76ee\u524d\u51e0\u6b3e\u5fae\u4fe1\u521b\u610f\u5c0f\u6e38\u620f\u8fdb\u884c\u6d4b\u8bd5\u53d1\u73b0\uff0c\u5fae\u4fe1\u5c0f\u6e38\u620f\u8fd0\u884c\u65f6\u7684\u5f02\u5e38 Crash \u591a\u662f\u7531\u4e8e\u5185\u5b58\u5360\u7528\u8fc7\u591a\u9020\u6210\u7684\u3002\u4e3a\u4e86\u65b9\u4fbf\u5f00\u53d1\u8005\u8c03\u4f18\u5c0f\u6e38\u620f\u5185\u5b58\uff0c\u672c\u6587\u4ece\u5f00\u53d1\u3001\u6d4b\u8bd5\u4e0e\u73b0\u7f51\u4e0d\u540c\u9636\u6bb5\u4ecb\u7ecd\u6211\u4eec\u5e38\u89c1\u7684\u5185\u5b58\u5206\u6790\u4e0e\u8c03\u4f18\u5de5\u5177\u3002<\/p>\n<\/li>\n<li>\n<p>\u73b0\u7f51\u6570\u636e\uff1a\u4e3a\u4ec0\u4e48\u8981\u505a\u5c0f\u6e38\u620f\u5185\u5b58\u4f18\u5316\uff1f \u5c0f\u6e38\u620f\u6570\u636e\u52a9\u624b\uff1a\u201c\u5c0f\u6e38\u620f\u6570\u636e\u52a9\u624b\u201d\u662f\u5fae\u4fe1\u53d1\u5e03\u7684\u5b98\u65b9\u5c0f\u7a0b\u5e8f\uff0c\u652f\u6301\u76f8\u5173\u7684\u5f00\u53d1\u548c\u8fd0\u8425\u4eba\u5458\u67e5\u770b\u81ea\u8eab\u5c0f\u6e38\u620f\u7684\u8fd0\u8425\u6570\u636e\u3002 \u4e3a\u4e86\u80fd\u8ba9\u5f00\u53d1\u8005\u638c\u63e1\u6e38\u620f\u7684\u8fd0\u884c\u6027\u80fd\u6570\u636e\uff0c\u5c0f\u6e38\u620f\u6846\u67b6\u5e95\u5c42\u4f1a\u5bf9\u73b0\u7f51\u73a9\u5bb6\u8fdb\u884c\u4e00\u5b9a\u6982\u7387\u7684\u91c7\u6837\uff0c\u91c7\u6837\u91cf\u53ef\u4ee5\u901a\u8fc7\u8d8b\u52bf\u6570\u636e\u52fe\u9009\u5f97\u5230\u3002\u9700\u8981\u4e0a\u62a5\u6027\u80fd\u6570\u636e\u7684\u73a9\u5bb6\u4f1a\u4ee5\u4e00\u5b9a\u65f6\u95f4\u95f4\u9694\uff08\u76ee\u524d\u4e3a 1 \u5206\u949f\uff09\u4e0a\u62a5\u6570\u636e\uff0c\u56e0\u6b64\u8be5\u6570\u503c\u80fd\u6bd4\u8f83\u51c6\u786e\u5730\u53cd\u5e94\u73a9\u5bb6\u771f\u5b9e\u7684\u6e38\u620f\u4f53\u9a8c\u60c5\u51b5\u3002\u6700\u7ec8\u8fd9\u4e9b\u6570\u503c\u4f1a\u5448\u73b0\u5728\u5c0f\u6e38\u620f\u6570\u636e\u52a9\u624b\u63d0\u4f9b\u7684\u201c\u6027\u80fd\u5206\u6790\u201c\u677f\u5757\u3002<\/p>\n<\/li>\n<\/ol>\n<p>\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u5728 iOS \u4e0b\u5c0f\u6e38\u620f\u4e0e\u5fae\u4fe1\u5ba2\u6237\u7aef\u662f\u5904\u4e8e\u540c\u8fdb\u7a0b\uff0c\u56e0\u6b64\u4e24\u8005\u603b\u5185\u5b58\u8fbe\u5230 OOM \u9608\u503c\uff08\u5982\u4e0a\u56fe\uff09\u65f6\u975e\u5e38\u5bb9\u6613\u88ab\u7cfb\u7edf KILL \u6389\uff0c\u56e0\u6b64\u5f00\u53d1\u8005\u9700\u8981\u683c\u5916\u6ce8\u610f\u5185\u5b58\u7684\u4f7f\u7528\u91cf\u3002 \u901a\u8fc7\u5206\u6790\uff0c\u6211\u4eec\u53d1\u73b0\u8bb8\u591a\u5c0f\u6e38\u620f\u5728 iOS \u7684\u5185\u5b58\u5f02\u5e38\u9000\u51fa\u7387\u504f\u9ad8\uff08\u5c24\u5176\u662f\u4f4e\u7aef\u673a\uff09\uff0c\u5982\u679c\u4f60\u53d1\u73b0\u81ea\u5df1\u7684\u5c0f\u6e38\u620f\u4e5f\u5b58\u5728\u8fd9\u6837\u7684\u73b0\u8c61\uff0c\u90a3\u4e48\u5f88\u5927\u6982\u7387\u5b58\u5728\u5185\u5b58\u95ee\u9898\u800c\u5bfc\u81f4\u5927\u6279\u73a9\u5bb6\u6d41\u5931\uff0c\u63a5\u4e0b\u6765\u9700\u8981\u8d76\u7d27\u7740\u624b\u4f18\u5316\u5c0f\u6e38\u620f\u7684\u5185\u5b58\u4f7f\u7528\u3002<\/p>\n<ol>\n<li>\u5f00\u53d1\u9636\u6bb5\uff1a \u628a\u4e00\u5207\u90fd\u63a7\u5236\u5728\u6700\u5f00\u59cb \u5f00\u53d1\u8fc7\u7a0b\u4e2d\uff0c\u4e3a\u4e86\u65b9\u4fbf\u5f00\u653e\u8005\u5b9a\u4f4d\u548c\u8c03\u8bd5\u6240\u7814\u53d1\u7684\u5fae\u4fe1\u5c0f\u6e38\u620f\u7684\u5185\u5b58\u95ee\u9898\uff0c\u672c\u6587\u63a8\u8350\u4e09\u6b3e\u5185\u5b58\u8c03\u8bd5\u5de5\u5177\uff1a<\/li>\n<\/ol>\n<p>\u5fae\u4fe1\u5f00\u53d1\u8005\u5de5\u5177 Performence \u4e0e Memory\uff1a\u5fae\u4fe1\u5f00\u53d1\u8005\u5de5\u5177\u4e2d\u5185\u7f6e\u4e86 Google Chrome DevTools \u5de5\u5177\u3002DevTools \u53ef\u4ee5\u5e2e\u52a9\u5f00\u53d1\u4eba\u5458\u5373\u65f6\u7f16\u8f91\u9875\u9762\u5e76\u5feb\u901f\u8bca\u65ad\u95ee\u9898\uff0c\u6700\u7ec8\u53ef\u4ee5\u5e2e\u52a9\u5f00\u53d1\u4eba\u5458\u66f4\u5feb\u5730\u6784\u5efa\u66f4\u597d\u7684\u5c0f\u6e38\u620f\u3002 \u5fae\u4fe1 Android \u771f\u673a\u6027\u80fd\u6d4b\u8bd5\uff1a\u5fae\u4fe1 Android \u7aef\u81ea\u8eab\u96c6\u6210\u4e86\u4e09\u79cd\u5185\u5b58\u5206\u6790\u5de5\u5177\uff0c\u5206\u522b\u662f\u6027\u80fd\u76d1\u63a7\u9762\u677f\u3001Heap Snapshot \u3001V8-CPU-Profile \u3002\u5f00\u53d1\u8005\u53ef\u901a\u8fc7\u4e09\u8005\u76d1\u63a7 Android \u771f\u673a\u73af\u5883\u4e0b\u5404\u6027\u80fd\u6307\u6807\u3002 PerfDog\uff1a\u79fb\u52a8\u5168\u5e73\u53f0 iOS\/Android \u6027\u80fd\u6d4b\u8bd5\u3001\u5206\u6790\u5de5\u5177\u5e73\u53f0\u3002\u5feb\u901f\u5b9a\u4f4d\u5206\u6790\u6027\u80fd\u95ee\u9898\uff0c\u63d0\u5347 APP \u5e94\u7528\u53ca\u6e38\u620f\u7684\u6027\u80fd\u548c\u54c1\u8d28\u3002\u624b\u673a\u65e0\u9700 ROOT\/\u8d8a\u72f1\u3002\u624b\u673a\u786c\u4ef6\u3001\u6e38\u620f\u53ca APP \u5e94\u7528\u4e5f\u65e0\u9700\u505a\u4efb\u4f55\u4fee\u6539\uff0c\u6781\u7b80\u5316\u5373\u63d2\u5373\u7528\u3002<\/p>\n<p>3.1.1 \u5fae\u4fe1\u5f00\u53d1\u8005\u5de5\u5177 \u4e4b Performance \u4e3a\u4e86\u66f4\u65b9\u4fbf\u6e05\u6670\u5730\u5206\u6790\u5185\u5b58\u95ee\u9898\uff0c\u5efa\u8bae\u5f00\u53d1\u8005\u5728\u5f15\u64ce\u7aef\u5bfc\u51fa\u5fae\u4fe1\u5c0f\u6e38\u620f\u9879\u76ee\u65f6\uff0c\u9009\u4e2d\u201c\u8c03\u8bd5\u6a21\u5f0f\u201d\u3002<\/p>\n<p>\u4f7f\u7528 Performance \u7684\u5f55\u5236\u6b65\u9aa4\u5982\u4e0b\u56fe\u6240\u793a\uff08\u52fe\u9009\u4e0a Performance \u4e0b\u7684 ScreenShots \u548c Memory\uff0c\u89c1\u4e0b\u56fe\u9ec4\u8910\u8272\u6846\u533a\u57df\uff09\uff1a<\/p>\n<p>3.1.3 Heap snapshot Heap snapshot \u6709 Summary \u3001Comparison \u3001Containment \u548c Statistics \u56db\u79cd\u89c6\u56fe\u3002<\/p>\n<p>Summary \u663e\u793a\u6309\u6784\u9020\u51fd\u6570\u540d\u79f0\u5206\u7ec4\u7684\u5bf9\u8c61\u3002\u4f7f\u7528\u5b83\u53ef\u4ee5\u6839\u636e\u6784\u9020\u51fd\u6570\u540d\u79f0\u5206\u7ec4\u7684\u7c7b\u578b\u6765\u67e5\u627e\u5bf9\u8c61\uff08\u53ca\u5176\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\uff09\u3002\u8fd9\u5bf9\u4e8e\u8ddf\u8e2a DOM \u6cc4\u6f0f\u7279\u522b\u6709\u7528 \u3002 Comparison \u663e\u793a\u4e24\u4e2a\u5feb\u7167\u4e4b\u95f4\u7684\u5dee\u5f02\u3002\u4f7f\u7528\u5b83\u53ef\u4ee5\u6bd4\u8f83\u64cd\u4f5c\u4e4b\u524d\u548c\u4e4b\u540e\u7684\u4e24\u4e2a\uff08\u6216\u591a\u4e2a\uff09\u5185\u5b58\u5feb\u7167\u3002\u901a\u8fc7\u68c0\u67e5\u91ca Statistics \u663e\u793a\u4e86\u5f53\u524d js heap \u5404\u79cd\u7c7b\u522b\u7684\u8d44\u6e90\u6240\u5360\u7528\u7684\u5185\u5b58\u5927\u5c0f\u7684\u7edf\u8ba1\u56fe\u3002<\/p>\n<ol>\n<li>Summary \u5982\u4e0b\u56fe\u6240\u793a\uff1a\u5176\u4e2d<\/li>\n<\/ol>\n<p>Constructor \u8868\u793a\u4f7f\u7528\u6b64\u6784\u9020\u51fd\u6570\u521b\u5efa\u7684\u6240\u6709\u5bf9\u8c61\u3002 Shallow Size \u663e\u793a\u5bf9\u8c61\u672c\u8eab\u5360\u7528\u7684\u5185\u5b58\u5927\u5c0f\u3002 Retained Size \u663e\u793a\u5220\u9664\u5bf9\u8c61\u540e\u53ef\u4ee5\u91ca\u653e\u7684\u5185\u5b58\u5927\u5c0f\uff08\u4f9d\u8d56\u9879\u4e0d\u53ef\u518d\u8bbf\u95ee\uff09\u3002\u8fd9\u4e2a\u5927\u5c0f\u5176\u5b9e\u4e3b\u8981\u5305\u542b\u4e86\u4f9d\u8d56\u9879\u7684\u5927\u5c0f\u3002 Distance \u4f7f\u7528\u8282\u70b9\u5230\u6839\u8ddd\u79bb\u7684\u6700\u77ed\u8def\u5f84\u3002 \u5c55\u5f00\u6bcf\u4e00\u884c\uff0c\u5c06\u663e\u793a\u5176\u6240\u6709\u5b9e\u4f8b\u3002 @\u5b57\u7b26\u540e\u7684\u6570\u5b57\u662f\u5bf9\u8c61\u7684\u552f\u4e00 ID\uff0c\u53ef\u4ee5\u6309\u5bf9\u8c61\u6bd4\u8f83\u5806\u5feb\u7167\u3002 (global property) \u2013 \u5168\u5c40\u5bf9\u8c61\u548c\u5176\u5f15\u7528\u5bf9\u8c61\u7684\u4e2d\u95f4\u5bf9\u8c61\u3002 (roots) \u2013 \u5f15\u7528\u4e86\u6240\u9009\u5bf9\u8c61\u7684\u5b9e\u4f53\u5bf9\u8c61\u3002\u5f15\u7528\u53ef\u80fd\u88ab\u6d4f\u89c8\u5668\u5f15\u64ce\u51fa\u4e8e\u81ea\u8eab\u76ee\u7684\u6240\u521b\u5efa\u3002\u6d4f\u89c8\u5668\u5f15\u64ce\u5177\u5907\u5f15\u7528\u7f13\u5b58\uff0c\u4f46\u662f\u8fd9\u4e9b\u5f15\u7528\u90fd\u662f\u5f31\u5f15\u7528\uff0c\u56e0\u6b64\u4e0d\u4f1a\u963b\u6b62\u6240\u9009\u5bf9\u8c61\u7684\u5783\u573e\u56de\u6536\u3002 (closure) \u2013 \u901a\u8fc7\u51fd\u6570\u95ed\u5305\u5bf9\u4e00\u7ec4\u5bf9\u8c61\u7684\u5f15\u7528\u8ba1\u6570\u3002 (array, string, number, regexp) \u2013 \u5177\u6709\u5f15\u7528\u6570\u7ec4\uff0c\u5b57\u7b26\u4e32\uff0c\u6570\u5b57\u6216\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u5c5e\u6027\u7684\u5bf9\u8c61\u7c7b\u578b\u7684\u5217\u8868\u3002 (compiled code) \u2013 \u6240\u6709\u4e0e\u7f16\u8bd1\u4ee3\u7801\u76f8\u5173\u7684\u5185\u5bb9\u3002 HTMLDivElement\uff0cArrayBuffer \u7b49 \u2013 \u5bf9\u4ee3\u7801\u5f15\u7528\u7684\u7279\u5b9a\u7c7b\u578b\u7684\u5143\u7d20\u6216\u6587\u6863\u5bf9\u8c61\u7684\u5f15\u7528\u3002 2. Comparison \u901a\u8fc7\u5c06\u591a\u4e2a\u5feb\u7167\u76f8\u4e92\u6bd4\u8f83\u6765\u67e5\u627e\u5b58\u5728\u5dee\u5f02\u7684\u5bf9\u8c61\u3002\u4e3a\u4e86\u9a8c\u8bc1\u67d0\u4e2a\u5e94\u7528\u7a0b\u5e8f\u64cd\u4f5c\u4e0d\u4f1a\u9020\u6210\u6cc4\u6f0f\uff08\u4f8b\u5982\uff0c\u901a\u5e38\u662f\u4e00\u5bf9\u76f4\u63a5\u548c\u53cd\u5411\u64cd\u4f5c\uff0c\u4f8b\u5982\u6253\u5f00\u4e00\u4e2a\u6587\u6863\uff0c\u7136\u540e\u5173\u95ed\u5b83\uff0c\u4e0d\u4f1a\u7559\u4e0b\u4efb\u4f55\u5783\u573e\uff09\uff0c\u60a8\u53ef\u4ee5\u9075\u5faa\u4ee5\u4e0b\u60c5\u5f62\uff1a<\/p>\n<p>\u5728\u6267\u884c\u64cd\u4f5c\u4e4b\u524d\uff0c\u5f55\u5236\u5806\u5feb\u7167\uff08 take heap snapshot \uff09\u3002 \u6267\u884c\u4e00\u9879\u64cd\u4f5c\uff08\u4ee5\u60a8\u8ba4\u4e3a\u4f1a\u5bfc\u81f4\u6cc4\u6f0f\u7684\u67d0\u79cd\u65b9\u5f0f\u4e0e\u9875\u9762\u8fdb\u884c\u4ea4\u4e92\uff09\u3002 \u6267\u884c\u76f8\u53cd\u7684\u64cd\u4f5c\uff08\u8fdb\u884c\u76f8\u53cd\u7684\u4ea4\u4e92\u5e76\u91cd\u590d\u51e0\u6b21\uff09\u3002 \u62cd\u6444\u7b2c\u4e8c\u4e2a\u5806\u5feb\u7167\uff0c\u5e76\u5c06\u5176\u89c6\u56fe\u66f4\u6539\u4e3a\u201c\u6bd4\u8f83\u201d\uff0c\u5c06\u5176\u4e0e\u5feb\u7167 1 \u8fdb\u884c\u6bd4\u8f83\u3002 \u5728\u201c\u6bd4\u8f83\u201d\u89c6\u56fe\u4e2d\uff0c\u663e\u793a\u4e24\u4e2a\u5feb\u7167\u4e4b\u95f4\u7684\u5dee\u5f02\u3002\u5c55\u5f00\u603b\u6761\u76ee\u65f6\uff0c\u663e\u793a\u6dfb\u52a0\u548c\u5220\u9664\u7684\u5bf9\u8c61\u5b9e\u4f8b\uff1a 3. Containment \u672c\u8d28\u4e0a\u662f\u5e94\u7528\u7a0b\u5e8f\u5bf9\u8c61\u7ed3\u6784\u7684\u201c\u9e1f\u77b0\u56fe\u201d\u3002\u53ef\u4ee5\u901a\u8fc7\u5b83\u67e5\u770b\u51fd\u6570\u95ed\u5305\u5185\u90e8\uff0c\u89c2\u5bdf\u7ec4\u6210 JavaScript \u5bf9\u8c61\u7684 VM \u5185\u90e8\u5bf9\u8c61\uff0c\u4ee5\u53ca\u4e86\u89e3\u5e94\u7528\u7a0b\u5e8f\u5728\u975e\u5e38\u4f4e\u7684\u7ea7\u522b\u4f7f\u7528\u4e86\u591a\u5c11\u5185\u5b58\u3002 \u8be5\u89c6\u56fe\u63d0\u4f9b\u4e86\u51e0\u4e2a\u5165\u53e3\u70b9\uff1a<\/p>\n<p>DOMWindow objects \u662f\u4ee3\u7801\u5c42\u9762\u7684\u201c\u5168\u5c40\u201d\u5bf9\u8c61\u3002 GC root \u662f VM \u5783\u573e\u56de\u6536\u4f7f\u7528\u7684\u5b9e\u9645 GC \u6839\u76ee\u5f55\u3002GC \u6839\u76ee\u5f55\u53ef\u4ee5\u7531\u5185\u7f6e\u5bf9\u8c61\u6620\u5c04\uff0c\u7b26\u53f7\u8868\uff0cVM \u7ebf\u7a0b\u5806\u6808\uff0c\u7f16\u8bd1\u7f13\u5b58\uff0c\u53e5\u67c4\u4f5c\u7528\u57df\uff0c\u5168\u5c40\u53e5\u67c4\u7ec4\u6210\u3002 native object \u662f JavaScript \u865a\u62df\u673a\u5185\u90e8\u201c\u63a8\u9001\u201d\u4ee5\u5141\u8bb8\u81ea\u52a8\u5316\u7684\u6d4f\u89c8\u5668\u5bf9\u8c61\uff0c\u4f8b\u5982 DOM \u8282\u70b9\uff0cCSS \u89c4\u5219\u3002 Allocation instrumentation on timeline \u5f55\u5236\u65f6\uff0c\u8bf7\u6ce8\u610f\u201c\u5206\u914d\u65f6\u95f4\u8f74\u201d\u4e0a\u662f\u5426\u6709\u84dd\u8272\u6761\u72b6\u663e\u793a\uff0c\u5982\u4e0b\u9762\u7684\u5c4f\u5e55\u622a\u56fe\u6240\u793a\u3002<\/p>\n<p>\u8fd9\u4e9b\u84dd\u8272\u6761\u8868\u793a\u65b0\u7684\u5185\u5b58\u5206\u914d\u3002\u53ef\u4ee5\u7f29\u653e\u680f\u4ee5\u7b5b\u9009\u201cConstructor\u201d \u7a97\u683c\uff0c\u4ee5\u4ec5\u663e\u793a\u5728\u6307\u5b9a\u65f6\u95f4\u8303\u56f4\u5185\u5206\u914d\u7684\u5bf9\u8c61\u3002 \u5c55\u5f00\u5bf9\u8c61\uff0c\u7136\u540e\u5355\u51fb\u5176\u503c\u67e5\u770b\u6709\u5173\u5b83\u7684\u66f4\u591a\u8be6\u7ec6\u4fe1\u606f\u3002<\/p>\n<p>3.2 \u5fae\u4fe1 Android \u771f\u673a\u6027\u80fd\u6d4b\u8bd5 \u5fae\u4fe1 Android \u7aef\u81ea\u8eab\u96c6\u6210\u4e86\u4e09\u79cd\u5185\u5b58\u5206\u6790\u5de5\u5177\uff0c\u5206\u522b\u662f\u6027\u80fd\u76d1\u63a7\u9762\u677f\u3001Heap Snapshot \u3001V8-CPU-Profile \u3002\u5f00\u53d1\u8005\u53ef\u901a\u8fc7\u4e09\u8005\u76d1\u63a7 Android \u771f\u673a\u73af\u5883\u4e0b\u5404\u6027\u80fd\u6307\u6807\u3002 \u901a\u8fc7\u6b64\u5de5\u5177\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u76d1\u63a7 Android \u771f\u673a\u73af\u5883\u4e0b\u7684\u5404\u4e2a\u5185\u5b58\u6307\u6807\u7684\u5b9e\u65f6\u53d8\u5316\u3002<\/p>\n<p>3.2.1 \u6027\u80fd\u76d1\u63a7\u9762\u677f \u5fae\u4fe1 Android 7.0.7 \u7248\u672c\u53ca\u4ee5\u4e0a\uff0c\u5fae\u4fe1\u4e3a\u5c0f\u6e38\u620f\u5f00\u53d1\u7248\u548c\u4f53\u9a8c\u7248\u63d0\u4f9b\u4e86\u6027\u80fd\u76d1\u63a7\u9762\u677f\uff0c\u53ef\u4ee5\u901a\u8fc7\u80f6\u56ca\u6309\u94ae-\u5f00\u53d1\u8c03\u8bd5-\u6253\u5f00\u6027\u80fd\u76d1\u63a7\u9762\u677f\u6253\u5f00\uff0c\u6548\u679c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p>\u5f00\u53d1\u8005\u53ef\u901a\u8fc7\u5728 Android \u771f\u673a\u4e2d\u5b9e\u65f6\u5730\u76d1\u63a7\u6574\u4e2a\u6e38\u620f\u8fc7\u7a0b\u4e2d\u7684\u5404\u9879\u8d44\u6e90\u7684\u53d8\u5316\uff0c\u66f4\u76f4\u63a5\u5730\u5b9a\u4f4d\u548c\u53d1\u73b0\u5185\u5b58\u95ee\u9898\u3002<\/p>\n<p>\u5f00\u53d1\u8005\u53ef\u4ee5\u76d1\u63a7\u4e0d\u540c\u5185\u5b58\u7684\u5360\u7528\u60c5\u51b5\uff0c\u901a\u8fc7\u4e0d\u540c\u5185\u5b58\u7684\u53d8\u5316\u8d8b\u52bf\u6765\u5224\u65ad\u662f\u5426\u6709\u5185\u5b58\u6cc4\u6f0f\u7684\u60c5\u51b5\uff0c\u5404\u4e2a\u6307\u6807\u542b\u4e49\u5982\u4e0b\uff1a<\/p>\n<p>\u540d\u79f0\u542b\u4e49 summary.native-heapnative \u5185\u5b58 summary.system \u7cfb\u7edf\u5185\u5b58 summary.total-swap \u603b swap \u5185\u5b58 summary.graphics \u663e\u5b58 summary.java-heapjava \u5185\u5b58 summary.total-pss \u603b\u5185\u5b58 summary.private-other \u5176\u4ed6\u79c1\u6709\u5185\u5b58 summary.code \u9759\u6001\u4ee3\u7801\uff0c\u8d44\u6e90\u5185\u5b58 summary.stack \u6808\u5185\u5b58<\/p>\n<p>&#8220;\u5185\u5b58&#8221;\u6307\u603b\u5185\u5b58\uff0c\u5176\u503c\u4e0e summary.total-pss \u4fdd\u6301\u4e00\u81f4\u3002<\/p>\n<p>3.2.2 Heap Snapshot \u5fae\u4fe1 Android 7.0.7 \u7248\u672c\u53ca\u4ee5\u4e0a\uff0c\u5fae\u4fe1\u4e3a\u5c0f\u6e38\u620f\u5f00\u53d1\u7248\u548c\u4f53\u9a8c\u7248\u63d0\u4f9b\u4e86 Heap \u5185\u5b58\u5feb\u7167\u7684\u80fd\u529b\uff0c\u540c\u6837\u662f\u5728\u80f6\u56ca\u6309\u94ae\u4e2d\u6253\u5f00\uff0c\u9009\u62e9\u5f00\u53d1\u8c03\u8bd5\u4e2d\u7684 Take Heap Snapshot\uff0c\u5728\u754c\u9762\u5f39\u51fa\u5982\u4e0b\u56fe\u6240\u793a\u7684\u63d0\u793a\u540e\uff0c\u4ece\u624b\u673a\u4e2d\u7684\u63d0\u793a\u7684\u4f4d\u7f6e\u628a Heap Snapshot \u62f7\u8d1d\u5230\u7535\u8111\u4e0a\u3002<\/p>\n<p>\u4e4b\u540e\u5728\u5fae\u4fe1\u5f00\u53d1\u8005\u5de5\u5177\u4e2d\u7684\u8c03\u8bd5\u5668\u7684 Memory \u4e2d\uff0cLoad \u62f7\u8d1d\u51fa\u7684 Heap Snapshot \u6587\u4ef6\uff0c\u5c31\u53ef\u4ee5\u67e5\u770b V8 \u7684\u5185\u5b58\u5feb\u7167\u4e86\uff0c\u6548\u679c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p>3.3 PerfDog \u7684\u4f7f\u7528\u8bf4\u660e \u5404\u4e2a\u53c2\u6570\u4fe1\u606f\u548c\u4f7f\u7528\u8bf4\u660e\u8be6\u89c1 PerfDog \u4f7f\u7528\u8bf4\u660e\uff1b \u672c\u8282\u53ea\u7cbe\u7b80\u5730\u4ecb\u7ecd\u4f7f\u7528 PerfDog \u8fdb\u884c\u5185\u5b58\u5b9a\u4f4d\u7684\u64cd\u4f5c\u3002<\/p>\n<p>\u5728\u672c\u6587\u4e2d\uff0cPerfDog \u7684\u4f5c\u7528\u5728\u4e8e \uff1a \uff08 1 \uff09\u8ffd\u8e2a\u5185\u5b58\u53d8\u5316\u7684\u573a\u666f\uff0c\u5e2e\u52a9\u5feb\u901f\u5b9a\u4f4d\u5230\u5185\u5b58\u5f02\u5e38\u7684\u573a\u666f\u3002 \uff08 2 \uff09\u4ece\u5b8f\u89c2\u89d2\u5ea6\u89c2\u5bdf\u5fae\u4fe1\u5c0f\u6e38\u620f\u8fd0\u884c\u65f6\u603b\u4f53\u5185\u5b58\u53d8\u5316\u8d8b\u52bf\uff0c\u5206\u6790\u5c0f\u6e38\u620f\u5185\u5b58\u7684\u53ef\u4f18\u5316\u7a7a\u95f4\u3002<\/p>\n<p>3.3.1 iOS \u8bbe\u5907\u4f7f\u7528\u8bf4\u660e Step 1\uff1a\u6253\u5f00 PerfDog\uff0c\u9009\u62e9\u624b\u673a\u8bbe\u5907\uff08 USB \u6a21\u5f0f\u6216\u8005 WIFI \u6a21\u5f0f\uff0c\u5efa\u8bae\u9009\u62e9 USB \u6a21\u5f0f\uff09\uff0c\u9009\u5b9a\u5e94\u7528\u7a0b\u5e8f\u201c\u5fae\u4fe1\u201d\u3002\u6b64\u65f6\u53ef\u4ee5\u770b\u5230\u53f3\u4fa7\u533a\u57df\u591a\u4e2a\u6307\u6807\u7684\u8d8b\u52bf\u56fe\u3002\u672c\u6587\u4e2d\u91cd\u70b9\u5173\u6ce8 Memory Usage \u3002 \u4e3a\u4e86\u66f4\u6e05\u6670\u5730\u5206\u6790\u5185\u5b58\u53d8\u5316\u573a\u666f\uff0c\u5efa\u8bae\u5728 PerfDog \u4e2d\u6253\u5f00 ScreenShot \uff08\u53ea\u652f\u6301 USB \u6a21\u5f0f\uff09\uff1a\u6253\u5f00\u65b9\u5f0f\u4e3a\u70b9\u51fb\u53f3\u4e0b\u89d2&#8221;\u2795&#8221;\uff0c\u9009\u4e2d ScreenShot \u3002\u5982\u4e0b\u56fe\uff1a Step 2\uff1a\u5728\u79fb\u52a8\u8bbe\u5907\u7ec8\u7aef\u6253\u5f00\u6240\u8981\u6d4b\u8bd5\u7684\u5fae\u4fe1\u5c0f\u6e38\u620f\u3002\u6b64\u65f6\u6b63\u5e38\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u770b\u5230\u53f3\u4fa7 Memory Usage \u4e2d\u7684\u5404\u4e2a\u66f2\u7ebf\u53d1\u751f\u53d8\u5316\u3002 Step 3\uff1a\u5728\u5fae\u4fe1\u5c0f\u6e38\u620f\u7684\u5404\u4e2a\u573a\u666f\u4e2d\u8fdb\u884c\u6e38\u620f\u64cd\u4f5c\uff0c\u89c2\u5bdf\u53f3\u4fa7 Memory Usage \u7684\u53d8\u5316\u3002iOS \u8bbe\u5907\u4e0b\u5fae\u4fe1\u5c0f\u6e38\u620f\u4e0e\u5fae\u4fe1\u5904\u4e8e\u540c\u4e00\u8fdb\u7a0b\uff0c\u6545\u76f4\u63a5\u89c2\u5bdf\u5fae\u4fe1\u8fdb\u7a0b\u7684 Memory Usage \u7684\u53d8\u5316\u5373\u53ef\u3002iOS \u8bbe\u5907\u4e0b Memory Usage \u5404\u5b57\u6bb5\u5982\u4e0b\u3002\u5728\u4e0b\u5217\u6307\u6807\u4e2d\uff0c\u5b9a\u4f4d\u5185\u5b58\u95ee\u9898\u91cd\u70b9\u5173\u6ce8 Memory \u6307\u6807\u3002Memory\uff1a\u7edf\u8ba1 FootPrint\uff0c\u662f\u6d4b\u8bd5\u8fc7\u7a0b\u4e2d\u91cd\u70b9\u89c2\u5bdf\u7684\u6307\u6807\u3002\u6ce8 1\uff1aPerfDog \u6682\u65f6\u5728 iOS9 \u300110 \u7cfb\u7edf\u65e0\u6cd5\u83b7\u53d6\u8be5\u5b57\u6bb5\uff0c\u5176\u4ed6\u7248\u672c\u53ef\u6b63\u5e38\u4f7f\u7528\u3002\u5982\u505a\u6027\u80fd\u6d4b\u8bd5\uff0c\u5efa\u8bae\u5347\u7ea7 iOS \u7cfb\u7edf\u7248\u672c\u3002 \u6ce8 2\uff1aOOM \u4e0e FootPrint \u6709\u5173\uff0c\u4e0e\u7cfb\u7edf\u3001\u673a\u578b\u65e0\u5173\u3002\u53ea\u4e0e RAM \u6709\u5173\uff0c\u5982 1G \u5185\u5b58\u673a\u5668\u3002FootPrint \u8d85\u8fc7 650MB\uff0c\u5f15\u53d1 OOM \u3002Xcode Memory\uff1aXCode Debug gauges \u7edf\u8ba1\u65b9\u5f0f\u3002\u6ce8\uff1aPerfDog \u6682\u65f6\u5728 iOS9 \u300110 \u7cfb\u7edf\u65e0\u6cd5\u83b7\u53d6\u8be5\u5b57\u6bb5\uff0c\u5176\u4ed6\u7248\u672c\u53ef\u6b63\u5e38\u4f7f\u7528\u3002\u5982\u505a\u6027\u80fd\u6d4b\u8bd5\uff0c\u5efa\u8bae\u5347\u7ea7 iOS \u7cfb\u7edf\u7248\u672c\u3002Real Memory\uff1aXcode Instrument \u7edf\u8ba1\u65b9\u5f0f\uff0c\u6307\u5b9e\u9645\u5360\u7528\u7269\u7406\u5185\u5b58\u3002\u6ce8\uff1a\u8be5\u6307\u6807\u4e0e\u7269\u7406\u5185\u5b58\u7cfb\u7edf\u7b56\u7565\u6709\u5173\uff0c\u8861\u91cf\u5185\u5b58\u6307\u6807\u65f6\u4e0d\u4f1a\u5173\u6ce8\uff0c\u4f46\u662f\u5b83\u6709\u52a9\u4e8e\u5206\u6790\u548c\u5b9a\u4f4d\u6574\u4f53\u6027\u80fd\u95ee\u9898\u3002\u6bd4\u5982\uff1aMemory \u6ca1\u6709\u964d\u4f4e\uff0c\u8bf4\u660e\u5e94\u7528\u6ca1\u6709\u91ca\u653e\u5185\u5b58\uff0c\u4f46\u662f Real Memory \u5374\u964d\u4f4e\u4e86\uff0c\u8bf4\u660e\u7cfb\u7edf\u5bf9\u5185\u5b58\u505a\u4e86\u538b\u7f29\u3002\u7531\u4e8e\u538b\u7f29\u4f1a\u5360\u7528 CPU \u8d44\u6e90\uff0c\u76f8\u5e94\u4f1a\u5bfc\u81f4 FPS \u964d\u4f4e\u3002Virtual Memory\uff1a\u865a\u62df\u5185\u5b58 Step 4\uff1a\u4f9d\u636e Memory \u66f2\u7ebf\u53d8\u5316\uff0c\u5bf9\u7167\u5b9e\u9645\u64cd\u4f5c\u573a\u666f\u6216\u8005 ScreenShot 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