Studying the effects of gzip compression and minification of JS files

Source JS file taken from jQuery 1.3.2

All % figures are % of the original, smaller is better. So 30% means the file was reduced to 30% of its original form, or a saving of 70%

See blog post for more...

Fileoriginal sizesize, gzipped% of originalgzip, % of original
original 120619 35088 100.00% 29.09%
closure-adv 49638 17583 41.15% 14.58%
closure 55320 18657 45.86% 15.47%
jsmin 73690 21198 61.09% 17.57%
packer 39246 18659 32.54% 15.47%
shrinksafe 69516 22105 57.63% 18.33%
yui 57256 19677 47.47% 16.31%