雅虎前端优化策略

• Content ·「网页内容相关
  
  • Make Fewer HTTP Requests [减少http请求次数]
  • Reduce DNS Lookups [减少DNS查询次数]
  • Avoid Redirects [避免页面跳转]
  • Make Ajax Cacheable [缓存Ajax]
  • Postload Components [延迟加载]
  • Preload Components [提前加载]
  • Reduce the Number of DOM Elements [减少Dom元素数量]
  • Split Components Across Domains [根据域名划分内容]
  • Minimize Number of iframes [减少iframes数量]
  • Avoid 404s [避免404]
• Server ·「服务器相关
  
  • Use a Content Delivery Network (CDN) [使用CDN]
  • Add Expires or Cache-Control Header ×[添加Cache-Control控制头]
  • Gzip Components [压缩传输文件]
  • Configure ETags [配置ETags]
  • Flush Buffer Early [尽早flush输出]
  • Use GET for Ajax Requests [使用get请求]
  • Avoid Empty Image src　　　　　　　　　　　　 [避免空的图片src]
• Cookie ·「缓存
  
  • Reduce Cookie Size [减少Cookie大小]
  • Use Cookie-Free Domains for Components [页面内容使用无cookie域名]
• CSS ·「CSS
  
  • Put Stylesheets at Top [样式置顶]
  • Avoid CSS Expressions [避免CSS表达式]
  • Choose Over @import [选择link而不是import]
  • Avoid Filters [避免使用Filters]
• JavaScript ·「JavaScript
  
  • Put Scripts at Bottom [脚本置底]
  • Make JavaScript and CSS External [使用外部的JavaScript和CSS3]
  • Minify JavaScript and CSS [简化的Js和css]
  • Remove Duplicate Scripts [脚本去重]
  • Minimize DOM Access [减少Dom访问]
  • Develop Smart Event Handlers [使用智能事件处理]
• Images ·「图片
  
  • Optimize Images [优化图片]
  • Optimize CSS Sprites [优化雪碧图]
  • Do Not Scale Images in HTML [不要在html中缩放图片]
  • Make favicon.ico Small and Cacheable [使用小且可缓存的favicon.ico]
• Mobile ·「移动客户端
  
  • Keep Components Under 25 KB [保持单个内容小于25KB]
  • Pack Components Into a Multipart Document [打包组建成复合文档]

https://developer.yahoo.com/performance/rules.html