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Submission + - Type inference boosts Firefox 9 JS performance 30% (

MrSeb writes: "After more than 18 months of hard graft, Mozilla has finally succeeded in landing a big addition to Firefox’s JavaScript engine that, upon initial testing, speeds up the web — or at least the vast swaths of it that use JavaScript — by around 20 to 30%. The new feature is the introduction of type inference to Firefox’s JaegerMonkey JIT compiler, and it will debut with Firefox 9."
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Type inference boosts Firefox 9 JS performance 30%

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