DEFLATE

DEFLATE is a lossless data compression algorithm similar to gzip, but it works in Apache 2. Instead of using PHP/mod_rewrite with ob_gzhandler, you can compress CSS and JavaScript with DEFLATE easily.

Implementation
Add this line to your .htaccess file: AddOutputFilterByType DEFLATE text/html text/plain text/xml text/javascript text/css application/javascript

External link

 * DEFLATE Compressed Data Format Specification version 1.3