"it turns your regular JavaScript code into compact, high-performance JavaScript code." It won't actually make your JavaScript much faster, if it does at all.

"it turns your regular JavaScript code into compact, high-performance JavaScript code." It won't actually make your JavaScript much faster, if it does at all. The major benefits are the exclusion of unused code, and code in-lining where possible. This helps a lot in terms of cutting down loading times, but your code is still only really going to be about as efficient as it was before.