Why to optimize scripts?
Optimized scripts are much smaller and download much faster. Usually optimization effect is 30-60% of source size. Sure you can’t optimize scripts which are already optimized (as you can’t compress already compressed file). Note: optimization effect is highly depends on your coding style. It can be more than 80% of source size if you use a lot of comments and use very long variables names, but it can be less than 20% if you don’t use comments and code markup at all and your variables names are very short.
