[原创]网站性能优化利器之一"google page speed"

[原创]网站性能优化利器之一"google page speed"

http://code.google.com/intl/zh-CN/speed/page-speed/

	What is Page Speed? Page Speed is an open-source Firefox/Firebug Add-on. Webmasters and web developers can use Page Speed to evaluate the performance of their web pages and to get suggestions on how to improve them.
	How does Page Speed work? Page Speed performs several tests on a site's web server configuration and front-end code. These tests are based on a set of best practices known to enhance web page performance. Webmasters who run Page Speed on their pages get a set of scores for each page, as well as helpful suggestions on how to improve its performance.
	Why should you use Page Speed? By using Page Speed, you can: Make your site faster. Keep Internet users engaged with your site. Reduce your bandwidth and hosting costs. Improve the web!

google page speed对网站优化建议，可以参考下面所示：

• Enable gzip compression
• Leverage browser caching
• Leverage proxy caching
• Remove unused CSS
• Serve static content from a cookieless domain
• Use efficient CSS selectors
• Minify JavaScript
• Optimize images
• Serve resources from a consistent URL
• Minimize redirects
• Put CSS in the document head
• Minimize cookie size
• Combine external JavaScript
• Minimize DNS lookups
• Optimize the order of styles and scripts
• Avoid CSS expressions
• Combine external CSS
• Defer loading of JavaScript
• Parallelize downloads across hostnames
• Specify image dimensions

类似yahoo yslow，有兴趣的朋友可以参考下！