{"rsdb":{"rid":"156525","subhead":"","postdate":"0","aid":"117484","fid":"54","uid":"1","topic":"1","content":"<p>\u968f\u7740\u73b0\u4ee3 Web \u6280\u672f\u7684\u53d1\u5c55\u4e0e\u7528\u6237\u4ea4\u4e92\u590d\u6742\u5ea6\u7684\u589e\u52a0\uff0c\u6211\u4eec\u7684\u7f51\u7ad9\u53d8\u5f97\u65e5\u76ca\u81c3\u80bf\uff0c\u4e5f\u8981\u6c42\u7740\u6211\u4eec\u4e0d\u65ad\u5730\u4f18\u5316\u7f51\u7ad9\u6027\u80fd\u4ee5\u4fdd\u8bc1\u53cb\u597d\u7684\u7528\u6237\u4f53\u9a8c\u3002\u672c\u6587\u4f5c\u8005\u5219\u7740\u773c\u4e8e <a href=https:\/\/www.cppentry.com style=text-decoration:underline;font-size:14px;color:#F70968; target=_blank>java<\/a> script \u542f\u52a8\u9636\u6bb5\u4f18\u5316\uff0c\u9996\u5148\u4ee5\u5927\u91cf\u7684\u6570\u636e\u5206\u6790\u9610\u8ff0\u4e86\u8bed\u6cd5\u5206\u6790\u3001\u7f16\u8bd1\u7b49\u6b65\u9aa4\u8017\u65f6\u5360\u6bd4\u8fc7\u591a\u662f\u5f88\u591a\u7f51\u7ad9\u7684\u6027\u80fd\u74f6\u9888\u4e4b\u4e00\u3002\u7136\u540e\u4f5c\u8005\u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u7528\u4e8e\u5728\u73b0\u4ee3\u6d4f\u89c8\u5668\u4e2d\u8fdb\u884c\u6027\u80fd\u8bc4\u6d4b\u7684\u5de5\u5177\uff0c\u8fd8\u5206\u522b\u4ece\u5f00\u53d1\u8005\u5de5\u7a0b\u5b9e\u8df5\u4e0e <a href=https:\/\/www.cppentry.com style=text-decoration:underline;font-size:14px;color:#F70968; target=_blank>java<\/a> script \u5f15\u64ce\u5185\u90e8\u5b9e\u73b0\u7684\u89d2\u5ea6\u9610\u8ff0\u4e86\u5e94\u5f53\u5982\u4f55\u63d0\u9ad8\u89e3\u6790\u4e0e\u7f16\u8bd1\u901f\u5ea6\u3002<\/p><br\/><p style=\"text-align: center;\"><img src=\"..\/..\/upload\/2017_02\/170215081788713.png\" alt=\"\" \/><\/p><br\/><p>\u5728 Web \u5f00\u53d1\u4e2d\uff0c\u968f\u7740\u9700\u6c42\u7684\u589e\u52a0\u4e0e\u4ee3\u7801\u5e93\u7684\u6269\u5f20\uff0c\u6211\u4eec\u6700\u7ec8\u53d1\u5e03\u7684 Web \u9875\u9762\u4e5f\u9010\u6e10\u81a8\u80c0\u3002\u4e0d\u8fc7\u8fd9\u79cd\u81a8\u80c0\u8fdc\u4e0d\u6b62\u610f\u5473\u7740\u5360\u636e\u66f4\u591a\u7684\u4f20\u8f93\u5e26\u5bbd\uff0c\u5176\u8fd8\u610f\u5473\u7740\u7528\u6237\u6d4f\u89c8\u7f51\u9875\u65f6\u53ef\u80fd\u66f4\u5dee\u52b2\u7684\u6027\u80fd\u4f53\u9a8c\u3002\u6d4f\u89c8\u5668\u5728\u4e0b\u8f7d\u5b8c\u67d0\u4e2a\u9875\u9762\u4f9d\u8d56\u7684\u811a\u672c\u4e4b\u540e\uff0c\u5176\u8fd8\u9700\u8981\u7ecf\u8fc7\u8bed\u6cd5\u5206\u6790\u3001\u89e3\u91ca\u4e0e\u8fd0\u884c\u8fd9\u4e9b\u6b65\u9aa4\u3002\u800c\u672c\u6587\u5219\u4f1a\u6df1\u5165\u5206\u6790\u6d4f\u89c8\u5668\u5bf9\u4e8e java script \u7684\u8fd9\u4e9b\u5904\u7406\u6d41\u7a0b\uff0c\u6316\u6398\u51fa\u90a3\u4e9b\u5f71\u54cd\u4f60\u5e94\u7528\u542f\u52a8\u65f6\u95f4\u7684\u7f6a\u9b41\u7978\u9996\uff0c\u5e76\u4e14\u6839\u636e\u6211\u4e2a\u4eba\u7684\u7ecf\u9a8c\u63d0\u51fa\u76f8\u5bf9\u5e94\u7684\u89e3\u51b3\u65b9\u6848\u3002\u56de\u987e\u8fc7\u53bb\uff0c\u6211\u4eec\u8fd8\u6ca1\u6709\u4e13\u95e8\u5730\u8003\u8651\u8fc7\u5982\u4f55\u53bb\u4f18\u5316 java script \u89e3\u6790\/\u7f16\u8bd1\u8fd9\u4e9b\u6b65\u9aa4\uff1b\u6211\u4eec\u9884\u60f3\u4e2d\u7684\u662f\u89e3\u6790\u5668\u5728\u53d1\u73b0 &lt;script> \u6807\u7b7e\u540e\u4f1a\u77ac\u65f6\u5b8c\u6210\u89e3\u6790\u64cd\u4f5c\uff0c\u4e0d\u8fc7\u8fd9\u5f88\u660e\u663e\u662f\u75f4\u4eba\u8bf4\u68a6\u3002\u4e0b\u56fe\u662f\u5bf9\u4e8e V8 \u5f15\u64ce\u5de5\u4f5c\u539f\u7406\u7684\u6982\u8ff0\uff1a<\/p><br\/><p style=\"text-align: center;\"><img src=\"..\/..\/upload\/2017_02\/170215081788711.png\" alt=\"\" \/><\/p><br\/><p>\u4e0b\u9762\u6211\u4eec\u6df1\u5165\u5176\u4e2d\u7684\u5173\u952e\u6b65\u9aa4\u8fdb\u884c\u5206\u6790\u3002<\/p><br\/><p>\u5728\u542f\u52a8\u9636\u6bb5\uff0c\u8bed\u6cd5\u5206\u6790\uff0c\u7f16\u8bd1\u4e0e\u811a\u672c\u6267\u884c\u5360\u636e\u4e86 java script \u5f15\u64ce\u8fd0\u884c\u7684\u7edd\u5927\u90e8\u5206\u65f6\u95f4\u3002\u6362\u8a00\u4e4b\uff0c\u8fd9\u4e9b\u8fc7\u7a0b\u9020\u6210\u7684\u5ef6\u8fdf\u4f1a\u771f\u5b9e\u5730\u53cd\u5e94\u5230\u7528\u6237\u53ef\u4ea4\u4e92\u65f6\u5ef6\u4e0a\uff1b\u8b6c\u5982\u7528\u6237\u5df2\u7ecf\u770b\u5230\u4e86\u67d0\u4e2a\u6309\u94ae\uff0c\u4f46\u662f\u8981\u597d\u51e0\u79d2\u4e4b\u540e\u624d\u80fd\u771f\u6b63\u5730\u53bb\u70b9\u51fb\u64cd\u4f5c\uff0c\u8fd9\u4e00\u70b9\u4f1a\u5927\u5927\u5f71\u54cd\u7528\u6237\u4f53\u9a8c\u3002<\/p><br\/><p style=\"text-align: center;\"><img src=\"..\/..\/upload\/2017_02\/170215081788712.png\" alt=\"\" \/><\/p><br\/><p>\u4e0a\u56fe\u662f\u6211\u4eec\u4f7f\u7528 Chrome Canary \u5185\u7f6e\u7684 V8 RunTime Call Stats \u5bf9\u4e8e\u67d0\u4e2a\u7f51\u7ad9\u7684\u5206\u6790\u7ed3\u679c\uff1b\u9700\u8981\u6ce8\u610f\u7684\u662f\u684c\u9762\u6d4f\u89c8\u5668\u4e2d\u8bed\u6cd5\u89e3\u6790\u4e0e\u7f16\u8bd1\u5360\u7528\u7684\u65f6\u95f4\u8fd8\u662f\u86ee\u957f\u7684\uff0c\u800c\u5728\u79fb\u52a8\u7aef\u4e2d\u5360\u7528\u7684\u65f6\u95f4\u5219\u66f4\u957f\u3002\u5b9e\u9645\u4e0a\uff0c\u5bf9\u4e8e Facebook, Wikipedia, Reddit \u8fd9\u4e9b\u5927\u578b\u7f51\u7ad9\u4e2d\u8bed\u6cd5\u89e3\u6790\u4e0e\u7f16\u8bd1\u6240\u5360\u7684\u65f6\u95f4\u4e5f\u4e0d\u5bb9\u5ffd\u89c6\uff1a<\/p><br\/><p style=\"text-align: center;\"><img src=\"..\/..\/upload\/2017_02\/170215081788718.png\" alt=\"\" \/><\/p><br\/><p>\u4e0a\u56fe\u4e2d\u7684\u7c89\u8272\u533a\u57df\u8868\u793a\u82b1\u8d39\u5728 V8 \u4e0e Blink's <a href=https:\/\/www.cppentry.com\/list.php?fid=49 style=text-decoration:underline;font-size:14px;color:#F70968; target=_blank>C++<\/a> \u4e2d\u7684\u65f6\u95f4\uff0c\u800c\u6a59\u8272\u548c\u9ec4\u8272\u5206\u522b\u8868\u793a\u8bed\u6cd5\u89e3\u6790\u4e0e\u7f16\u8bd1\u7684\u65f6\u95f4\u5360\u6bd4\u3002Facebook \u7684 Sebastian Markbage \u4e0e Google \u7684 Rob Wormald \u4e5f\u90fd\u5728 Twitter \u53d1\u6587\u8868\u793a\u8fc7 java script \u7684\u8bed\u6cd5\u89e3\u6790\u65f6\u95f4\u8fc7\u957f\u5df2\u7ecf\u6210\u4e3a\u4e86\u4e0d\u53ef\u5ffd\u89c6\u7684\u95ee\u9898\uff0c\u540e\u8005\u8fd8\u8868\u793a\u8fd9\u4e5f\u662f Angular \u542f\u52a8\u65f6\u4e3b\u8981\u7684\u6d88\u8017\u4e4b\u4e00\u3002<\/p><br\/><p style=\"text-align: center;\"><img src=\"..\/..\/upload\/2017_02\/170215081788716.jpg\" alt=\"\" \/><\/p><br\/><p>\u968f\u7740\u79fb\u52a8\u7aef\u6d6a\u6f6e\u7684\u6d8c\u6765\uff0c\u6211\u4eec\u4e0d\u5f97\u4e0d\u9762\u5bf9\u4e00\u4e2a\u6b8b\u9177\u7684\u4e8b\u5b9e\uff1a\u79fb\u52a8\u7aef\u5bf9\u4e8e\u76f8\u540c\u5305\u4f53\u7684\u89e3\u6790\u4e0e\u7f16\u8bd1\u8fc7\u7a0b\u8981\u82b1\u8d39\u76f8\u5f53\u4e8e\u684c\u9762\u6d4f\u89c8\u56682~5\u500d\u7684\u65f6\u95f4\u3002\u5f53\u7136\uff0c\u5bf9\u4e8e\u9ad8\u914d\u7684 iPhone \u6216\u8005 Pixel \u8fd9\u6837\u7684\u624b\u673a\u76f8\u8f83\u4e8e Moto G4 \u8fd9\u6837\u7684\u4e2d\u914d\u624b\u673a\u8868\u73b0\u4f1a\u597d\u5f88\u591a\uff1b\u8fd9\u4e00\u70b9\u63d0\u9192\u6211\u4eec\u5728\u6d4b\u8bd5\u7684\u65f6\u5019\u4e0d\u80fd\u4ec5\u7528\u8eab\u8fb9\u90a3\u4e9b\u9ad8\u914d\u7684\u624b\u673a\uff0c\u800c\u5e94\u8be5\u4e2d\u9ad8\u4f4e\u914d\u517c\u987e\uff1a<\/p><br\/><p style=\"text-align: center;\"><img src=\"..\/..\/upload\/2017_02\/170215081788717.jpg\" alt=\"\" \/><\/p><br\/><p>\u4e0a\u56fe\u662f\u90e8\u5206\u684c\u9762\u6d4f\u89c8\u5668\u4e0e\u79fb\u52a8\u7aef\u6d4f\u89c8\u5668\u5bf9\u4e8e 1MB \u7684 java script \u5305\u4f53\u8fdb\u884c\u89e3\u6790\u7684\u65f6\u95f4\u5bf9\u6bd4\uff0c\u663e\u800c\u6613\u89c1\u7684\u53ef\u4ee5\u53d1\u73b0\u4e0d\u540c\u914d\u7f6e\u7684\u79fb\u52a8\u7aef\u624b\u673a\u4e4b\u95f4\u7684\u5de8\u5927\u5dee\u5f02\u3002\u5f53\u6211\u4eec\u5e94\u7528\u5305\u4f53\u5df2\u7ecf\u975e\u5e38\u5de8\u5927\u7684\u65f6\u5019\uff0c\u4f7f\u7528\u4e00\u4e9b\u73b0\u4ee3\u7684\u6253\u5305\u6280\u5de7\uff0c\u8b6c\u5982\u4ee3\u7801\u5206\u5272\uff0cTreeShaking\uff0cService Workder \u7f13\u5b58\u7b49\u7b49\u4f1a\u5bf9\u542f\u52a8\u65f6\u95f4\u6709\u5f88\u5927\u7684\u5f71\u54cd\u3002\u53e6\u4e00\u4e2a\u89d2\u5ea6\u6765\u770b\uff0c\u5373\u4f7f\u662f\u5c0f\u6a21\u5757\uff0c\u4f60\u4ee3\u7801\u5199\u7684\u5f88\u7cdf\u6216\u8005\u4f7f\u7528\u4e86\u5f88\u7cdf\u7684\u4f9d\u8d56\u5e93\u90fd\u4f1a\u5bfc\u81f4\u4f60\u7684\u4e3b\u7ebf\u7a0b\u82b1\u8d39\u5927\u91cf\u7684\u65f6\u95f4\u5728\u7f16\u8bd1\u6216\u8005\u5197\u4f59\u7684\u51fd\u6570\u8c03\u7528\u4e2d\u3002\u6211\u4eec\u5fc5\u987b\u8981\u6e05\u9192\u5730\u8ba4\u8bc6\u5230\u5168\u9762\u8bc4\u6d4b\u4ee5\u6316\u6398\u51fa\u771f\u6b63\u6027\u80fd\u74f6\u9888\u7684\u91cd\u8981\u6027\u3002<\/p><br\/><p>\u6211\u66fe\u4e0d\u6b62\u4e00\u6b21\u542c\u5230\u6709\u4eba\u8bf4\uff0c\u6211\u53c8\u4e0d\u662f Facebook\uff0c\u4f60\u8bf4\u7684 java script \u8bed\u6cd5\u89e3\u6790\u4e0e\u7f16\u8bd1\u5230<\/p><br\/><p>\u5e95\u4f1a\u5bf9\u5176\u4ed6\u7f51\u7ad9\u9020\u6210\u4ec0\u4e48\u6837\u7684\u5f71\u54cd\u5462\uff1f\u5bf9\u4e8e\u8fd9\u4e2a\u95ee\u9898\u6211\u4e5f\u5f88\u597d\u5947\uff0c\u4e8e\u662f\u6211\u82b1\u8d39\u4e86\u4e24\u4e2a\u6708\u7684\u65f6\u95f4\u5bf9\u4e8e\u8d85\u8fc7 6000 \u4e2a\u7f51\u7ad9\u8fdb\u884c\u5206\u6790\uff1b\u8fd9\u4e9b\u7f51\u7ad9\u56ca\u62ec\u4e86 React\uff0cAngular\uff0cEmber\uff0cVue \u8fd9\u4e9b\u6d41\u884c\u7684\u6846\u67b6\u6216\u8005\u5e93\u3002\u5927\u90e8\u5206\u7684\u6d4b\u8bd5\u662f\u57fa\u4e8e WebPageTest \u8fdb\u884c\u7684\uff0c\u56e0\u6b64\u4f60\u53ef\u4ee5\u5f88\u65b9\u4fbf\u5730\u91cd\u73b0\u8fd9\u4e9b\u6d4b\u8bd5\u7ed3\u679c\u3002 \u5149\u7ea4\u63a5\u5165\u7684\u684c\u9762\u6d4f\u89c8\u5668\u5927\u6982\u9700\u8981 8 \u79d2\u7684\u65f6\u95f4\u624d\u80fd\u5141\u8bb8\u7528\u6237\u4ea4\u4e92\uff0c\u800c 3G \u73af\u5883\u4e0b\u7684 Moto G4 \u5927\u6982\u9700\u8981 16 \u79d2 \u624d\u80fd\u5141\u8bb8\u7528\u6237\u4ea4\u4e92\u3002<\/p><br\/><p style=\"text-align: center;\"><img src=\"..\/..\/upload\/2017_02\/170215081788719.png\" alt=\"\" \/><\/p><br\/><p>\u5927\u90e8\u5206\u5e94\u7528\u5728\u684c\u9762\u6d4f\u89c8\u5668\u4e2d\u4f1a\u8017\u8d39\u7ea6 4 \u79d2\u7684\u65f6\u95f4\u8fdb\u884c java script \u542f\u52a8\u9636\u6bb5\uff08\u8bed\u6cd5\u89e3\u6790\u3001\u7f16\u8bd1\u3001\u6267\u884c\uff09\uff1a<\/p><br\/><p style=\"text-align: center;\"><img src=\"..\/..\/upload\/2017_02\/170215081788714.jpg\" alt=\"\" \/><\/p><br\/><p>\u800c\u5728\u79fb\u52a8\u7aef\u6d4f\u89c8\u5668\u4e2d\uff0c\u5927\u6982\u8981\u82b1\u8d39\u989d\u5916 36% \u7684\u65f6\u95f4\u6765\u8fdb\u884c\u8bed\u6cd5\u89e3\u6790\uff1a<\/p><br\/><p style=\"text-align: center;\"><img src=\"..\/..\/upload\/2017_02\/170215081788715.jpg\" alt=\"\" \/><\/p><br\/><p>\u53e6\u5916\uff0c\u7edf\u8ba1\u663e\u793a\u5e76\u4e0d\u662f\u6240\u6709\u7684\u7f51\u7ad9\u90fd\u7529\u7ed9\u7528\u6237\u4e00\u4e2a\u5e9e\u5927\u7684 JS \u5305\u4f53\uff0c\u7528\u6237\u4e0b\u8f7d\u7684\u7ecf\u8fc7 Gzip \u538b\u7f29\u7684\u5e73\u5747\u5305\u4f53\u5927\u5c0f\u662f 410KB\uff0c\u8fd9\u4e00\u70b9\u4e0e HTTPArchive \u4e4b\u524d\u53d1\u5e03\u7684 420KB \u7684\u6570\u636e\u57fa\u672c\u4e00\u81f4\u3002\u4e0d\u8fc7\u6700\u5dee\u52b2\u7684\u7f51\u7ad9\u5219\u662f\u76f4\u63a5\u7529\u4e86 10MB \u7684\u811a\u672c\u7ed9\u7528\u6237\uff0c\u7b80\u76f4\u53ef\u6015\u3002<\/p><br\/><p style=\"text-align: center;\"><img src=\"..\/..\/upload\/2017_02\/1702150817887115.png\" alt=\"\" \/><\/p><br\/><p>\u901a\u8fc7\u4e0a\u9762\u7684\u7edf\u8ba1\u6211\u4eec\u53ef\u4ee5\u53d1\u73b0\uff0c\u5305\u4f53\u4f53\u79ef\u56fa\u7136\u91cd\u8981\uff0c\u4f46\u662f\u5176\u5e76\u975e\u552f\u4e00\u56e0\u7d20\uff0c\u8bed\u6cd5\u89e3\u6790\u4e0e\u7f16\u8bd1\u7684\u8017\u65f6\u4e5f\u4e0d\u4e00\u5b9a\u968f\u7740\u5305\u4f53\u4f53\u79ef\u7684\u589e\u957f\u800c\u7ebf\u6027\u589e\u957f\u3002\u603b\u4f53\u800c\u8a00\u5c0f\u7684 java script \u5305\u4f53\u662f\u4f1a\u52a0\u8f7d\u5730\u66f4\u5feb\uff08\u5ffd\u7565\u6d4f\u89c8\u5668\u3001\u8bbe\u5907\u4e0e\u7f51\u7edc\u8fde\u63a5\u7684\u5dee\u5f02\uff09\uff0c\u4f46\u662f\u540c\u6837 200KB \u7684\u5927\u5c0f\uff0c\u4e0d\u540c\u5f00\u53d1\u8005\u7684\u5305\u4f53\u5728\u8bed\u6cd5\u89e3\u6790\u3001\u7f16\u8bd1\u4e0a\u7684\u65f6\u95f4\u5374\u662f\u5929\u5dee\u5730\u522b\uff0c\u4e0d\u53ef\u540c\u65e5\u800c\u8bed\u3002<\/p><br\/><p>\u6253\u5f00 Timeline( Performance panel ) > Bottom-Up\/Call Tree\/Event Log \u5c31\u4f1a\u663e\u793a\u51fa\u5f53\u524d\u7f51\u7ad9\u5728\u8bed\u6cd5\u89e3\u6790\/\u7f16\u8bd1\u4e0a\u7684\u65f6\u95f4\u5360\u6bd4\u3002\u5982\u679c\u4f60\u5e0c\u671b\u5f97\u5230\u66f4\u5b8c\u6574\u7684\u4fe1\u606f\uff0c\u90a3\u4e48\u53ef\u4ee5\u6253\u5f00 V8 \u7684 Runtime Call Stats\u3002\u5728 Canary \u4e2d\uff0c\u5176\u4f4d\u4e8e Timeline \u7684 Experims > V8 Runtime Call Stats \u4e0b\u3002<\/p><br\/><p style=\"text-align: center;\"><img src=\"..\/..\/upload\/2017_02\/1702150817887111.jpg\" alt=\"\" \/><\/p><br\/><p>\u6253\u5f00 about:tracing \u9875\u9762\uff0cChrome \u63d0\u4f9b\u7684\u5e95\u5c42\u7684\u8ffd\u8e2a\u5de5\u5177\u5141\u8bb8\u6211\u4eec\u4f7f\u7528 disabled-by-default-v8.runtime_stats \u6765\u6df1\u5ea6\u4e86\u89e3 V8 \u7684\u65f6\u95f4\u6d88\u8017\u60c5\u51b5\u3002V8 \u4e5f\u63d0\u4f9b\u4e86 <a rel=\"nofollow,noindex\">\u8be6\u7ec6\u7684\u6307\u5357<\/a> \u6765\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528\u8fd9\u4e2a\u529f\u80fd\u3002<\/p><br\/><p style=\"text-align: center;\"><img src=\"..\/..\/upload\/2017_02\/1702150817887110.jpg\" alt=\"\" \/><\/p><br\/><p style=\"text-align: center;\"><img src=\"..\/..\/upload\/2017_02\/1702150817887112.png\" alt=\"\" \/><\/p><br\/><p>WebPageTest \u4e2d Processing Breakdown \u9875\u9762\u5728\u6211\u4eec\u542f\u7528 Chrome > Capture Dev Tools Timeline \u65f6\u4f1a\u81ea\u52a8\u8bb0\u5f55 V8 \u7f16\u8bd1\u3001eva luateScript \u4ee5\u53ca FunctionCall \u7684\u65f6\u95f4\u3002\u6211\u4eec\u540c\u6837\u53ef\u4ee5\u901a\u8fc7\u6307\u660e disabled-by-default-v8.runtime_stats \u7684\u65b9\u5f0f\u6765\u542f\u7528 Runtime Call Stats\u3002<\/p><br\/><p style=\"text-align: center;\"><img src=\"..\/..\/upload\/2017_02\/1702150817887116.png\" alt=\"\" \/><\/p><br\/><p>\u66f4\u591a\u4f7f\u7528\u8bf4\u660e\u53c2\u8003\u6211\u7684 <a rel=\"nofollow,noindex\">gist<\/a> \u3002<\/p><br\/><p>\u6211\u4eec\u8fd8\u53ef\u4ee5\u4f7f\u7528 Nolan Lawson \u63a8\u8350\u7684 <a rel=\"nofollow,noindex\">User Timing API<\/a> \u6765\u8bc4\u4f30\u8bed\u6cd5\u89e3\u6790\u7684\u65f6\u95f4\u3002\u4e0d\u8fc7\u8fd9\u79cd\u65b9\u5f0f\u53ef\u80fd\u4f1a\u53d7 V8 \u9884\u89e3\u6790\u8fc7\u7a0b\u7684\u5f71\u54cd\uff0c\u6211\u4eec\u53ef\u4ee5\u501f\u9274 Nolan \u5728 optimize-js \u8bc4\u6d4b\u4e2d\u7684\u65b9\u5f0f\uff0c\u5728\u811a\u672c\u7684\u5c3e\u90e8\u6dfb\u52a0\u968f\u673a\u5b57\u7b26\u4e32\u6765\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u3002\u6211\u57fa\u4e8e Google Analytics \u4f7f\u7528\u76f8\u4f3c\u7684\u65b9\u5f0f\u6765\u8bc4\u4f30\u771f\u5b9e\u7528\u6237\u4e0e\u8bbe\u5907\u8bbf\u95ee\u7f51\u7ad9\u65f6\u5019\u7684\u89e3\u6790\u65f6\u95f4\uff1a<\/p><br\/><p style=\"text-align: center;\"><img src=\"..\/..\/upload\/2017_02\/1702150817887117.jpg\" alt=\"\" \/><\/p><br\/><p>Etsy \u7684 <a rel=\"nofollow,noindex\">DeviceTiming<\/a> \u5de5\u5177\u80fd\u591f\u6a21\u62df\u67d0\u4e9b\u53d7\u9650\u73af\u5883\u6765\u8bc4\u4f30\u9875\u9762\u7684\u8bed\u6cd5\u89e3\u6790\u4e0e\u6267\u884c\u65f6\u95f4\u3002\u5176\u5c06\u672c\u5730\u811a\u672c\u5305\u88f9\u5728\u4e86\u67d0\u4e2a\u4eea\u8868\u5de5\u5177\u4ee3\u7801\u5185\u4ece\u800c\u4f7f\u6211\u4eec\u7684\u9875\u9762\u80fd\u591f\u6a21\u62df\u4ece\u4e0d\u540c\u7684\u8bbe\u5907\u4e2d\u8bbf\u95ee\u3002\u53ef\u4ee5\u9605\u8bfb Daniel Espeset \u7684 <a rel=\"nofollow,noindex\">Benchmarking JS Parsing and Execution on Mobile Devices<\/a> \u4e00\u6587\u6765\u4e86\u89e3\u66f4\u8be6\u7ec6\u7684\u4f7f\u7528\u65b9\u5f0f\u3002<\/p><br\/><p style=\"text-align: center;\"><img src=\"..\/..\/upload\/2017_02\/1702150817887114.jpg\" alt=\"\" \/><\/p><br\/><p>\u5982\u679c\u4f60\u7684 java script \u6846\u67b6\u652f\u6301 AOT\uff08ahead-of-time\uff09\u7f16\u8bd1\u6a21\u5f0f\uff0c\u90a3\u4e48\u80fd\u591f\u6709\u6548\u5730\u51cf\u5c11\u89e3\u6790\u4e0e\u7f16\u8bd1\u7684\u65f6\u95f4\u3002Angular \u5e94\u7528\u5c31\u53d7\u76ca\u4e8e\u8fd9\u79cd\u6a21\u5f0f\uff1a<\/p><br\/><p style=\"text-align: center;\"><img src=\"..\/..\/upload\/2017_02\/1702150817887113.png\" alt=\"\" \/><\/p><br\/><p>\u4e0d\u7528\u7070\u5fc3\uff0c\u4f60\u5e76\u4e0d\u662f\u552f\u4e00\u7ea0\u7ed3\u4e8e\u5982\u4f55\u63d0\u5347\u542f\u52a8\u65f6\u95f4\u7684\u4eba\uff0c\u6211\u4eec V8 \u56e2\u961f\u4e5f\u4e00\u76f4\u5728\u52aa\u529b\u3002\u6211\u4eec\u53d1\u73b0\u4e4b\u524d\u7684\u67d0\u4e2a\u8bc4\u6d4b\u5de5\u5177 Octane \u662f\u4e2a\u4e0d\u9519\u7684\u5bf9\u4e8e\u771f\u5b9e\u573a\u666f\u7684\u6a21\u62df\uff0c\u5b83\u5728\u5fae\u578b\u6846\u67b6\u4e0e\u51b7\u542f\u52a8\u65b9\u9762\u5f88\u7b26\u5408\u771f\u5b9e\u7684\u7528\u6237\u4e60\u60ef\u3002\u800c\u57fa\u4e8e\u8fd9\u4e9b\u5de5\u5177\uff0cV8 \u56e2\u961f\u5728\u8fc7\u53bb\u7684\u5de5\u4f5c\u4e2d\u4e5f\u5b9e\u73b0\u4e86\u5927\u7ea6 25% \u7684\u542f\u52a8\u6027\u80fd\u63d0\u5347\uff1a<\/p><br\/><p style=\"text-align: center;\"><img src=\"..\/..\/upload\/2017_02\/1702150817887120.jpg\" alt=\"\" \/><\/p><br\/><p>\u672c\u90e8\u5206\u6211\u4eec\u5c31\u4f1a\u5bf9\u8fc7\u53bb\u51e0\u5e74\u4e2d\u6211\u4eec\u4f7f\u7528\u7684\u63d0\u5347\u8bed\u6cd5","orderid":"0","title":"JavaScript \u542f\u52a8\u6027\u80fd\u74f6\u9888\u5206\u6790\u4e0e\u89e3\u51b3\u65b9\u6848(\u4e00)","smalltitle":"","mid":"0","fname":"linux\u7f16\u7a0b\u57fa\u7840","special_id":"0","bak_id":"0","info":"0","hits":"531","pages":"2","comments":"0","posttime":"2017-02-21 08:16:08","list":"1487636168","username":"admin","author":"","copyfrom":"","copyfromurl":"","titlecolor":"","fonttype":"0","titleicon":"0","picurl":"https:\/\/www.cppentry.com\/upload_files\/","ispic":"0","yz":"1","yzer":"","yztime":"0","levels":"0","levelstime":"0","keywords":"<A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=JavaScript' target=_blank>JavaScript<\/A> <A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=%C6%F4%B6%AF' target=_blank>\u542f\u52a8<\/A> <A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=%D0%D4%C4%DC' target=_blank>\u6027\u80fd<\/A> <A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=%C6%BF%BE%B1' target=_blank>\u74f6\u9888<\/A> <A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=%B7%D6%CE%F6' target=_blank>\u5206\u6790<\/A> <A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=%BD%E2%BE%F6%B7%BD%B0%B8' target=_blank>\u89e3\u51b3\u65b9\u6848<\/A>","jumpurl":"","iframeurl":"","style":"","template":"a:3:{s:4:\"head\";s:0:\"\";s:4:\"foot\";s:0:\"\";s:8:\"bencandy\";s:0:\"\";}","target":"0","ip":"14.17.22.31","lastfid":"0","money":"0","buyuser":"","passwd":"","allowdown":"","allowview":"","editer":"","edittime":"0","begintime":"0","endtime":"0","description":"java script 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