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I found this line interesting: "There are several hundred thousands lines of javascript in Gmail – one of the biggest in the world".

I'd like to see what the engineers have to say on managing that much JavaScript.

This is what they'd say:



And how they do to keep a good load time for gmail, with the potential down download that much. (Though at my day job we probably rival that amount of JS, but it's an intranet app, so nobody in the wild gets to see it.)

Gmail uses the Google Web Toolkit, a lot of the javascript that runs on the site is actually produced via code that is originally in java.


Gmail precedes GWT.

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