Firefox 9 uses type inference to improve JavaScript performance by 20-30%

Re:Firefox 9 uses type inference to improve JavaScript perfo... by DrJokepu on Wednesday August 31, 2011 @12:27PM (#2946261)

(edit: I have said something stupid, nothing to see here, move along)

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Re:Firefox 9 uses type inference to improve JavaScript perfo... by ootachi on Wednesday August 31, 2011 @12:32PM (#2946280)

You're confusing Crankshaft with type inference. Crankshaft, which landed around Chrome 10, is an SSA-based optimization infrastructure. Type inference augments an optimization infrastructure with additional information. The two are complementary. V8 does not use type inference.

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Re:Firefox 9 uses type inference to improve JavaScript perfo... by magicalist on Wednesday August 31, 2011 @01:17PM (#2946500)

I don't think that's quite correct. IonMonkey also uses an SSA-based intermediate representation, and Crankshaft does generate type specialized code (as does TraceMonkey).

The big thing that IonMonkey is adding is type inference through static analysis, which is a big deal for JavaScript.

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Re:Firefox 9 uses type inference to improve JavaScript perfo... by rayiner on Wednesday August 31, 2011 @04:36PM (#2947438)

He's correct. This type inference is actually being added to JaegerMonkey according to the article, though IonMonkey will have it too when it's ready.

Crankshaft uses type feedback, not type inference. Ie: it will monitor the types of objects to generate type-specialized code, but will not do static type inference on the code to generate type-specialized code.

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Re:Firefox 9 uses type inference to improve JavaScript perfo... by grantg on Thursday September 01, 2011 @05:23AM (#2949278)

So you did ycombinator's version of [deleted]. :P

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