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By Simon Willison

Analyse your site

By Simon Willison
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Andy King’s Web Page Analyzer is a smart tool for checking the speed of your site. It can detect whether or not your content is being served using gzip compression, and offers a number of suggestions for performance improvements. The most useful tip I’ve seen it offer is this one about external CSS and JavaScript files:

For external files, try to keep them less than 1160 bytes to fit within one higher-speed TCP-IP packet (or an approximate multiple thereof).

Watch out though: it seems that the analyzer doesn’t currently follow @import links in stylesheets, so it may under-report your included CSS files.

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