I have discover a wonderful script that will compress JS and CSS on the fly. It uses RewriteEngine to redirect browser looking for JS and CSS file to a PHP script file. It is very easy to implement and transparent to the existing application. No change is required on the existing application. The script also cache compression result in cache directory. I manage to improve 50% vTiger CRM’s Main Page loading time. It is a huge performance increase with so little effort. The wonderful tool is located at http://farhadi.ir/jsmart.html

If you are developing your own application, it is a no brainer if you don’t compress JS and CSS files before sending it across the Internet to the user browser. It would gain better performance, if the compression is automatically in your application rather than using rewrite engine to redirect js/css to compression script on the web server.