CSS JS Booster at gos.i
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CSS JS Booster

CSS-JS-Booster is a PHP-script that tries to automate as many performance
optimizing steps related to CSS and JS embedding as possible.

For CSS these steps are:

  1. combine multiple CSS-files resulting in number of HTTP-requests going down
  2. minify CSS
  3. Embed any CSS-images smaller 24KB as data-URI or MHTML (for IE <= 7)
  4. Split the output back into 2 even files that can load in parallel (not for WP)
  5. GZIP-compress the resulting CSS
  6. Have browsers cache the result as long as it remains unchanged
  7. If IE6: Issue a JS-command to fix background image caching behaviour

For JS these steps are:

  1. combine multiple JS-files resulting in number of HTTP-requests going down
  2. Minify the JS through the Google Closure Compiler Webservice, or JSMin as fallback (not for WP)
  3. GZIP-compress the resulting JS
  4. Have browsers cache the result as long as it remains unchanged + GZIP-compresses the page calling those files.

Depending on the amount of CSS, CSS-images and JS, this can significantly
increase loading speed of your site.