Check out the official github page at: http://github.com/cornflakesuperstar/minified_cache
Sample file reductions:
|prototype.js (version 188.8.131.52):||from 127kb to 94kb||saves 33kb (26% size reduction)|
|prototype.js, effects.js, dragdrop.js, controls.js (rails :defaults):||from 229kb to 168kb||saves 61kb (27% size reduction)|
Note: this plugin was put together on rails 2.2.2. It probably needs some tweaking for older rails versions.