Fastersite: Finding memory leaks.
JavaScript performance is something everyone should consider as they’re copying and pasting that jQuery plugin or putting together the latest instance of enhancement within a document.
The great part about working with JavaScript is that everyone is taking it so seriously, especially the Chrome Dev Team. Chrome is not only totally awesome for users, it’s terrific for developers. I truly feel it’s a developer’s browser first, and in being so good at that, is also the best consumer browser.
Memory is a big deal no matter what language you’re working in. Regardless of how good the garbage collection is, if things are written poorly, that garbage might never get scooped up. Have a look at this great walkthrough of recognizing and dealing with JavaScript memory leaks.
There’s a ton of good info to keep in mind the next time you’re doing a larger scale JavaScript implementation.