{"id":1108,"date":"2009-09-14T17:49:40","date_gmt":"2009-09-14T09:49:40","guid":{"rendered":"http:\/\/nan.im\/blog\/?p=1108"},"modified":"2012-05-18T13:36:53","modified_gmt":"2012-05-18T05:36:53","slug":"_-yahoo-yslow-grade-a-happing","status":"publish","type":"post","link":"http:\/\/nan.im\/blog\/1108","title":{"rendered":"\u5982\u4f55\u8fbe\u5230 Yahoo! ySlow GradeA \u901f\u5ea6\u6307\u6807\uff08\u4e00\uff09"},"content":{"rendered":"

Yahoo! YSlow<\/strong><\/a> \u662f\u4e00\u4e2a\u7531 Yahoo! \u96c5\u864e\u5f00\u53d1\u7684 Firebug \u63d2\u4ef6\uff0c\u5176\u5b9e\u901a\u8fc7\u8fd9\u4e2a\u540d\u5b57\u5c31\u77e5\u9053\u8fd9\u6b3e\u63d2\u4ef6\u662f\u5e72\u561b\u7684\u5373 Y(why)Slow \u540d\u5b57\u8d77\u7684\u592a\u597d\u4e86 ySlow \u53ef\u4ee5\u901a\u8fc7\u5206\u6790\u7f51\u9875\u5185\u5404\u9879\u8d44\u6e90\u7684\u52a0\u8f7d\u60c5\u51b5\u5bf9\u4e09\u7c7b\u7f51\u9875\u8fdb\u884c\u8bc4\u7ea7\uff0c\u5e76\u63d0\u4f9b\u4e00\u4e9b\u975e\u5e38\u6709\u7528\u7684\u5efa\u8bae\uff0c\u76ee\u524d\u4e3b\u8981\u88ab\u7528\u6765\u6d4b\u8bd5\u7f51\u7ad9\u52a0\u8f7d\u901f\u5ea6\u53ca\u83b7\u5f97\u7f51\u9875\u63d0\u901f\u5efa\u8bae\u3002\u8bb0\u5f97\u8fd9\u4e2a\u5c0f\u7ad9\u521a\u5f00\u64ad\u7684\u65f6\u5019\u662f GradeC \u540e\u6765\u7b80\u5355\u8c03\u4e86\u4e00\u4e0b\u5230\u4e86 GradeB \u4eca\u5929\u7ec8\u4e8e\u4e0b\u51b3\u5fc3\u51b2\u4e00\u4e0b GradeA \u91cd\u5199\u4e86\u51e0\u4e4e\u4e09\u5206\u4e4b\u4e00\u7684\u4ee3\u7801\u548c\u56fe\u7247\uff0c\u7ec8\u4e8e\u529f\u592b\u4e0d\u8d1f\u6709\u5fc3\u4eba\u4e0d\u4ec5\u6574\u4f53\u8fbe\u5230 GradeA \u7ea7\u522b\uff0c\u5e76\u4e14\u6240\u6709\u7684 14 \u9879\u6307\u6807\u4e5f\u5747\u4e3a GradeA \u8bc4\u7ea7 Overall performance score 99 \u5206\uff0c\u90a3\u4e48\u5982\u4f55\u80fd\u987a\u5229\u8fbe\u5230\u8fd9\u4e2a\u6307\u6807\u5462\uff0c\u8fd9\u91cc\u5c06\u5206\u522b\u4ece 14 \u9879\u5185\u5bb9\u7b80\u5355\u63cf\u8ff0\u4e00\u4e0b\u2026\u2026<\/p>\n

<\/p>\n

\u5148\u622a\u56fe\u7559\u4e2a\u7eaa\u5ff5\u5427\u2026\u2026<\/p>\n

\"yslow-grade-a\"<\/a><\/center><\/p>\n

\u4f46\u8fd9\u4e2a GradeA \u4ecd\u7136\u662f Small Site or Blog \u6807\u51c6\u4e0b\u7684 GradeA \u53e6\u5916\u5176\u5b83\u53e6\u5916\u7684\u4e24\u4e2a\u6807\u51c6 Classic \u548c YSlow2 \u76ee\u524d\u4ecd\u7136\u662f GradeC \u7ea7\u522b\uff0c\u5355\u5c31\u91cc\u9762 CDN \u8fd9\u4e00\u9879\u4e2a\u4eba\u7f51\u7ad9\u5c31\u6ca1\u6709\u529e\u6cd5\u514b\u670d\uff0c\u4f46\u672c\u7ad9\u672c\u6765\u5c31\u662f Blog \u561b\u7406\u5e94\u8fd8\u662f\u7528 Blog \u7684\u6807\u51c6\u8861\u91cf\u7684\uff0c\u4e0b\u9762\u5c31\u5206\u522b\u4ee5\u8fd9 14 \u4e2a\u6307\u6807\u7b80\u5355\u89e3\u91ca\u4e00\u4e0b\uff0c\u5176\u4e2d\u7684\u4e00\u4e9b\u5185\u5bb9\u6211\u4eec\u4e0d\u9700\u8981\u4e86\u89e3\u5176\u539f\u7406\uff0c\u56e0\u4e3a\u6d4f\u89c8\u5668\u90fd\u662f\u56fe\u5f62\u754c\u9762\u7684\uff0c\u6211\u4eec\u901a\u5e38\u4e0d\u4e86\u89e3\u5728\u8fd9\u534e\u4e3d\u7684\u80cc\u540e\u53d1\u751f\u7684\u4e8b\u60c5\uff0c\u8fd9\u662f\u7f51\u7edc\u534f\u8bae\u7684\u8303\u7574\u2026\u2026<\/p>\n

1\u3001Make fewer HTTP requests<\/strong><\/p>\n

\u51cf\u5c11 HTTP \u8bf7\u6c42\uff1a\u6d4f\u89c8\u5668\u6253\u5f00\u9875\u9762\u5e76\u4e0e\u670d\u52a1\u5668\u7684 IP \u5730\u5740\u5efa\u7acb TCP \u94fe\u63a5\u4e4b\u540e\u5c31\u4f1a\u5f00\u59cb\u53d1\u9001 HTTP \u8bf7\u6c42\u6765\u4e0b\u8f7d\u9875\u9762\u4e0a\u76f8\u5173\u6587\u4ef6\u53ca\u5143\u7d20\uff0c\u901a\u5e38\u6bcf\u4e2a\u6587\u4ef6\uff08\u5916\u90e8\u6837\u5f0f \u5916\u90e8\u811a\u672c \u56fe\u7247 \u7b49\u7b49\uff09\u90fd\u9700\u8981\u6d4f\u89c8\u5668\u53d1\u9001\u4e00\u6b21 HTTP \u8bf7\u6c42\u3002\u800c\u5efa\u7acb HTTP \u8bf7\u6c42\u662f\u9700\u8981\u65f6\u95f4\u548c\u5e26\u5bbd\u5f00\u9500\u7684\uff0c\u5728 56Kbps \u65f6\u4ee3\u7f51\u7edc\u5e26\u5bbd\u5f88\u5c0f\uff0c\u6211\u4eec\u901a\u5e38\u9700\u8981\u5c06\u5927\u56fe\u5207\u5272\u6210\u5c0f\u56fe\u6765\u591a\u6b21\u4e0b\u8f7d\u4ee5\u51cf\u5c11\u6bcf\u4e2a\u56fe\u7247\u4ece\u4e0b\u8f7d\u5230\u663e\u793a\u7684\u65f6\u95f4\uff1b\u800c\u76ee\u524d\u7684\u5bbd\u5e26\u65f6\u4ee3\u5219\u9700\u8981\u901a\u8fc7\u51cf\u5c11 HTTP \u94fe\u63a5\u6b21\u6570\u6765\u51cf\u5c11\u7f51\u9875\u52a0\u8f7d\u65f6\u95f4\u3002<\/p>\n

\u5177\u4f53\u63aa\u65bd\uff1a\u5408\u5e76\u6587\u4ef6\u4ee5\u8fbe\u5230\u51cf\u5c11 HTTP \u8bf7\u6c42\u6b21\u6570\u7684\u76ee\u7684\u5982\uff1a\u5408\u5e76\u591a\u4e2a CSS \u6587\u4ef6\u5230\u4e00\u4e2a\u6587\u4ef6\uff1b\u5408\u5e76\u591a\u4e2a js \u811a\u672c\u5230\u4e00\u4e2a\u811a\u672c\u6587\u4ef6\uff1b\u5408\u5e76\u5168\u90e8\u80cc\u666f\u56fe\u7247\u4f7f\u7528 CSS Sprites \u6280\u672f\u7b49\u3002<\/p>\n

2\u3001Compress components with gzip<\/strong><\/p>\n

\u4f7f\u7528 gZip \u538b\u7f29\uff1a\u8fd9\u79cd\u538b\u7f29\u6280\u672f\u5b58\u5728\u4e8e \u670d\u52a1\u5668 \u548c \u6d4f\u89c8\u5668 \u4e4b\u95f4\uff0c\u9996\u5148\u6d4f\u89c8\u5668\u5728\u8bf7\u6c42 URL \u5730\u5740\u65f6\u4f1a\u5305\u542b\u662f\u5426\u652f\u6301 gZip \u7684\u4fe1\u606f\u5934\uff0c\u5982\u679c\u652f\u6301\u670d\u52a1\u5668\u5c06\u5bf9\u7f51\u9875\u6587\u4ef6\u6d41\u8fdb\u884c\u538b\u7f29\uff08\u8fd9\u79cd\u538b\u7f29\u901a\u5e38\u80fd\u5230\u6e90\u6587\u4ef6\u7684 1\/10 ~ 3\/10 \u4ece\u800c\u8282\u7ea6 70% \u7684\u4e0b\u8f7d\u65f6\u95f4\uff09\uff1b\u5982\u679c\u6d4f\u89c8\u5668\u4e0d\u652f\u6301\u5219\u53d1\u9001\u672a\u538b\u7f29\u7684\u6587\u4ef6\u6d41\u7ed9\u6d4f\u89c8\u5668\u3002\u8fd9\u79cd\u538b\u7f29\u4e0b\u8f7d\u5e94\u8be5\u662f\u76ee\u524d\u63d0\u9ad8\u7f51\u9875\u4e0b\u8f7d\u901f\u5ea6\u6700\u4e3a\u6709\u6548\u7684\u65b9\u5f0f\u4e4b\u4e00\u3002<\/p>\n

\u5177\u4f53\u63aa\u65bd\uff1a\u9700\u8981\u54a8\u8be2\u4f60\u7684\u670d\u52a1\u5668\u6258\u7ba1\u7ef4\u62a4\u4eba\u5458\u6216\u865a\u62df\u4e3b\u673a\u4f9b\u5e94\u5546\uff0c\u670d\u52a1\u5668\u7aef\u914d\u7f6e\u5f00\u542f gZip \u538b\u7f29\uff0c\u5fc5\u8981\u65f6\u5b89\u88c5\u7b2c\u4e09\u65b9\u529f\u80fd\u53ca\u6a21\u5757\uff0c\u4f46\u67d0\u4e9b\u60c5\u51b5\u4e0b IE6 \u5bf9\u8fd9\u9879\u6280\u672f\u7684\u652f\u6301\u5e76\u4e0d\u5c3d\u4eba\u610f\u3002<\/p>\n

3\u3001Put CSS at top<\/strong><\/p>\n

\u9875\u5934 CSS \u6587\u4ef6\uff1a\u5c06\u5f15\u5165 CSS \u6837\u5f0f\u8868\u7684\u4ee3\u7801\u79fb\u81f3\u9875\u5934 head \u6807\u7b7e\u5185\u5c06\u6709\u52a9\u4e8e\u9875\u9762\u6e32\u67d3\u9010\u6b65\u52a0\u5feb\uff0c\u4e5f\u53ef\u907f\u514d\u4ee3\u7801\u5148\u4e8e\u6837\u5f0f\u8868\u5b8c\u6210\u4e0b\u8f7d\u9020\u6210\u7684\u65e0\u6837\u5f0f\u9875\u9762\u3002<\/p>\n

\u5177\u4f53\u63aa\u65bd\uff1a\u4f7f\u7528 link \u6807\u7b7e\u5f15\u5165 CSS \u6837\u5f0f\u8868\u5e76\u9650\u5b9a\u8bbe\u5907\u7c7b\u578b\uff0c\u8fd9\u6837\u53ef\u907f\u514d\u5176\u4ed6\u8bbe\u5907\u4e0b\u8f7d\u5e76\u53ef\u5728\u5ba2\u6237\u7aef\u7f13\u51b2 CSS \u6587\u4ef6\u4ece\u800c\u52a0\u5feb\u4e8c\u6b21\u6d4f\u89c8\u901f\u5ea6\u3002<\/p>\n

4\u3001Put JavaScript at bottom<\/strong><\/p>\n

\u9875\u811a JS \u6587\u4ef6\uff1a\u5c06\u5f15\u5165 JavaScript \u811a\u672c\u6587\u4ef6\u7684\u4ee3\u7801\u79fb\u81f3\u9875\u811a\uff0c\u53ef\u907f\u514d\u7531\u4e8e\u4e0b\u8f7d js \u6587\u4ef6\u800c\u803d\u8bef\u9875\u9762\u4e3b\u4f53\u5185\u5bb9\u7684\u4e0b\u8f7d\u8fdb\u5ea6\uff0c\u901a\u5e38 js \u811a\u672c\u90fd\u7528\u6765\u5904\u7406\u7528\u6237\u884c\u4e3a\uff0c\u6240\u4ee5\u4e5f\u5e94\u8be5\u5728\u9875\u9762\u52a0\u8f7d\u5b8c\u6210\u4e4b\u540e\u518d\u540e\u53f0\u4e0b\u8f7d\u3002<\/p>\n

\u5177\u4f53\u63aa\u65bd\uff1a\u4f7f\u7528 script \u6807\u7b7e\u5f15\u5165 JavaScript \u811a\u672c\u7684\u4ee3\u7801\u653e\u5230 body \u6807\u7b7e\u6216 html \u6807\u7b7e\u4e4b\u524d\u5373\u53ef\uff0c\u53e6\u5916\u5c3d\u91cf\u4e0d\u8981\u5728\u9875\u9762\u4e2d\u51fa\u73b0 js \u5185\u5bb9\uff0c\u800c\u662f\u628a\u6240\u6709\u811a\u672c\u653e\u5728\u4e00\u4e2a js \u6587\u4ef6\u4e2d\u5f15\u5165\uff0c\u4e5f\u53ef\u4ee5\u7f13\u5b58\u4ece\u800c\u52a0\u5feb\u4e8c\u6b21\u6d4f\u89c8\u901f\u5ea6\u3002<\/p>\n

5\u3001Avoid CSS expressions<\/strong><\/p>\n

\u907f\u514d CSS \u811a\u672c\uff1a\u5728 IE \u6d4f\u89c8\u5668\u4e2d\u53ef\u4ee5\u4f7f\u7528 filter \u8fd9\u4e2a IE \u79c1\u6709\u7684 CSS \u5c5e\u6027\u6765\u5728\u6837\u5f0f\u8868\u6587\u4ef6\u4e2d\u5b9e\u73b0 js \u811a\u672c\u7684\u4e00\u4e9b\u529f\u80fd\uff0c\u4f46\u8fd9\u6837\u505a\u7684\u4ee3\u4ef7\u662f\u5de8\u5927\u7684\uff0c\u5728\u4e27\u5931\u6d4f\u89c8\u5668\u517c\u5bb9\u6027\u7684\u540c\u65f6\u4e5f\u4f1a\u6d6a\u8d39\u5927\u91cf\u7cfb\u7edf\u8d44\u6e90\uff0c\u56e0\u4e3a IE \u6d4f\u89c8\u5668\u5728\u6e32\u67d3 filter \u5c5e\u6027\u7684\u65f6\u5019\u4e0d\u4ec5\u662f\u9875\u9762\u7f29\u653e\u751a\u81f3\u6eda\u52a8\u9875\u9762\u3001\u9f20\u6807\u79fb\u52a8\u7684\u540c\u65f6\u90fd\u9700\u8981\u91cd\u65b0\u8ba1\u7b97 filter \u503c\uff0c\u6240\u4ee5\u5728 CSS \u4e2d\u4f7f\u7528\u8868\u8fbe\u5f0f\uff08Expressions\uff09\u662f\u53ef\u6015\u7684\u3002<\/p>\n

\u5177\u4f53\u63aa\u65bd\uff1a\u5220\u9664 CSS \u6837\u5f0f\u8868\u4e2d\u6240\u6709\u7684 filter \u5c5e\u6027\u4f7f\u7528\u6807\u51c6\u7684 W3C \u6837\u5f0f\u8868\u5c5e\u6027\u4ee3\u66ff\uff0c\u5b9e\u5728\u9700\u8981\u8bbe\u7f6e\u53d8\u91cf\u503c\u7684\u53ef\u4ee5\u5728 js \u6587\u4ef6\u4e2d\u7f16\u5199\u811a\u672c\u5b9e\u73b0\u3002<\/p>\n

6\u3001Reduce DNS lookups<\/strong><\/p>\n

\u51cf\u5c11 DNS \u67e5\u8be2\uff1a\u6240\u8c13 DNS \u67e5\u8be2\u5c31\u662f\u6d4f\u89c8\u5668\u4ece DNS \u670d\u52a1\u5668\u67e5\u8be2\u57df\u540d\u83b7\u53d6 IP \u5730\u5740\u7684\u8fc7\u7a0b\u3002\u901a\u5e38\u8fd9\u79cd\u60c5\u51b5\u51fa\u73b0\u4e8e\u7f51\u9875\u5185\u6709\u51fa\u73b0\u5176\u4ed6\u57df\u7684\u6587\u4ef6\uff0c\u6bd4\u5982\u5728\u57df nan.im \u4e0b\u7684\u7f51\u9875\u5982\u679c\u6dfb\u52a0\u4e86 \u8c37\u6b4c\u5206\u6790 \u7edf\u8ba1\u4ee3\u7801\u5c31\u4f1a\u589e\u52a0\u4e00\u6b21\u5230 www.google-analytics.com \u7684 DNS \u67e5\u8be2\u3002<\/p>\n

\u5177\u4f53\u63aa\u65bd\uff1a\u5c3d\u91cf\u5728\u7f51\u7ad9\u672c\u57df\u4e0b\u653e\u7f6e\u6240\u6709\u7684\u7f51\u9875\u6587\u4ef6\u53ca\u4ee3\u7801\uff0c\u8fd9\u6837\u6574\u4e2a\u9875\u9762\u53ea\u9700\u8981\u4e00\u6b21 DNS \u67e5\u8be2\u5c31\u8db3\u591f\u4e86\u3002\u4f46\u5e76\u4e0d\u662f\u8bf4\u7edd\u5bf9\u5982\u6b64\uff0c\u5982\u679c\u5728\u5927\u578b\u7f51\u7ad9\u4f7f\u7528 Content Delivery Network\uff08CDN\uff09\u5185\u5bb9\u5206\u53d1\u7f51\u7edc \u7684\u8bdd\u5373\u4f7f\u4f1a\u6709 DNS \u67e5\u8be2\uff0c\u4f46\u4ecd\u7136\u4f1a\u63d0\u9ad8\u9875\u9762\u603b\u4f53\u4e0b\u8f7d\u901f\u5ea6\u3002<\/p>\n

7\u3001Minify JavaScript and CSS<\/strong><\/p>\n

\u538b\u7f29 JS CSS \u6587\u4ef6\uff1a\u7f51\u9875\u6587\u4ef6\u7684\u5927\u5c0f\u975e\u5e38\u76f4\u63a5\u7684\u53cd\u6620\u5728\u9875\u9762\u4e0b\u8f7d\u65f6\u95f4\u4e0a\uff0c\u8fd9\u91cc\u7684\u538b\u7f29\u662f\u6307\u6587\u4ef6\u672c\u8eab\u7684\u538b\u7f29\uff0c\u4e0d\u540c\u4e8e\u524d\u9762\u670d\u52a1\u5668\u7aef\u7684 gZip \u538b\u7f29\u3002<\/p>\n

\u5177\u4f53\u63aa\u65bd\uff1a\u4ece\u6587\u4ef6\u4e2d\u5220\u9664\u4e0d\u5fc5\u8981\u7684\u5b57\u7b26\u5982\u591a\u4f59\u7684\u7a7a\u683c\u7b26 \u6362\u884c\u7b26 \u8df3\u683c\u7b26 \u6ce8\u91ca \u7b49\u5185\u5bb9\u4ee5\u8fbe\u5230\u51cf\u5c11\u9875\u9762\u4f53\u79ef\u7f29\u77ed\u4e0b\u8f7d\u65f6\u95f4\u7684\u76ee\u7684\u3002<\/p>\n

\u4eca\u5929\u5c31\u5148\u5230\u8fd9\uff0c\u6b32\u77e5\u540e\u4e8b\u5982\u4f55\uff0c\u8bf7\u770b\u4e0b\u96c6\u300a\u5982\u4f55\u8fbe\u5230 Yahoo! ySlow GradeA \u901f\u5ea6\u6307\u6807\uff08\u4e8c\uff09<\/a>\u300b\u2026\u2026<\/p>\n","protected":false},"excerpt":{"rendered":"

Yahoo! YSlow \u662f\u4e00\u4e2a\u7531 Yahoo! \u96c5\u864e\u5f00\u53d1\u7684 Firebug \u63d2\u4ef6\uff0c\u5176\u5b9e\u901a\u8fc7\u8fd9\u4e2a\u540d\u5b57\u5c31\u77e5\u9053\u8fd9\u6b3e […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[24,116,95,117],"class_list":["post-1108","post","type-post","status-publish","format-standard","hentry","category-tech","tag-develop","tag-seo","tag-wordpress","tag-yahoo"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":6}},"_links":{"self":[{"href":"http:\/\/nan.im\/blog\/wp-json\/wp\/v2\/posts\/1108","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/nan.im\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/nan.im\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/nan.im\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/nan.im\/blog\/wp-json\/wp\/v2\/comments?post=1108"}],"version-history":[{"count":0,"href":"http:\/\/nan.im\/blog\/wp-json\/wp\/v2\/posts\/1108\/revisions"}],"wp:attachment":[{"href":"http:\/\/nan.im\/blog\/wp-json\/wp\/v2\/media?parent=1108"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/nan.im\/blog\/wp-json\/wp\/v2\/categories?post=1108"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/nan.im\/blog\/wp-json\/wp\/v2\/tags?post=1108"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}