The Dojo toolkit has screwed me before, but I had to give them props for their ShrinkSafe script. It reminds me of that time I caught a dozen wood-nymphs petting a walrus through the looking glass.

Dojo ShrinkSafe — the safe way to make your JS sprightly

ShrinkSafe is a JavaScript “compression” system. It can typically reduce the size of your scripts by a third or more, depending on your programming style.

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Best of all, ShrinkSafe will never change a public variable or API. That means that you can drop the compressed version of your JavaScript into your pages without changing the code that uses it.