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October 7, 2010 20:23
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| From slide 22 of http://www.fischmarkt.de/2010/05/very_high_performance_websites_the_next.html Many of these can be checked with the YSlow Firebug extension. | |
| * Make fewer HTTP requests | |
| * Use a Content Delivery Network (CDN) | |
| * Add Expires headers | |
| * Compress components with gzip | |
| * Put CSS at top | |
| * Put JavaScript at bottom | |
| * Avoid CSS expressions | |
| * Make JavaScript and CSS external | |
| * Reduce DNS lookups | |
| * Minify JavaScript and CSS | |
| * Avoid URL redirects | |
| * Remove duplicate JavaScript and CSS | |
| * Configure entity tags (ETags) | |
| * Make AJAX cacheable | |
| * Use GET for AJAX requests | |
| * Reduce the number of DOM elements | |
| * Avoid HTTP 404 (Not Found) error | |
| * Reduce cookie size | |
| * Use cookie-free domains | |
| * Avoid AlphaImageLoader filter | |
| * Do not scale images in HTML | |
| * Make favicon small and cacheable |
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