Minify reads in the content, decorates it by way of removing extraneous characters, and gzips the response.

Just like Minify, YUI Compressor strips out all of the unnecessary characters from your JavaScript, including spaces, line breaks, and comments.

The Closure Compiler was introduced by Google.

The JS File returns the Minify JavaScript.

Only disableXHRListener property has a default value false. The properties disableWhenFirebugActive and showIconWhenHidden has a default value of true.

In the Advanced panel, you can have the test stop running at document completion. That will tell us when the document.onload event is fired, instead of when all assets on the page are loaded.

The Application layer handles the top-level communication that the client and servers use, like HTTP and SMTP for email clients.

The span of time that you are waiting for the page to be usable depends on web performance.

When we compare the runtime performance for coalescing functionality, using functions, and using objects, the Firefox UsingFunct shows a better performance.

Intially, YSlow was an extension of Firefox.