While all the world scrutinized the proposed "Do Not Track" feature for Mozilla's Firefox 4 on Monday, a tiny patch quietly emerged that promises to cut the open source browser's startup time in half on Windows.
The 20-line patch works by preloading Firefox's XML Markup Language (XUL) library. Whereas previously that library was loaded in chunks of 32KB or less, the patch works by "tricking" Windows into preloading the library in 2MB increments instead, Mozilla developer Taras Glek explained recently on Mozilla's Bugzilla forum.

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