I have written couple of articles on Google's Closure Compiler:

In terms of Javascript Compression, the most widely used tools are: JSMIN, the DOJO Compressor, Dean Edwards’ Packer and YUI Compressor. The YUI Compressor is designed to be 100% safe and yield a higher compression ratio than the other tools listed above. That’s why most of the JavaScript Frameworks use YUI Compressor to minimize their Javascript code

On November 5th, Google announced Closure Compiler for Javascript compression. The strongest part of the Closure Compiler is that it does not only remove whitespace but also it rewrites Javascript Code to make it smaller. It also optimizes your Javascript code to perform better.

In this post, I compared the compression performance of YUI Compressor and Google Closer Compiler using the well-known Javascript Frameworks - Mootools, JQuery and Prototype:

Comparing YUI Compressor and Closure Compiler
Comparing YUI Compressor and Closure Compiler - the values given in the chart are bytes



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