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A comment on Firefox 9 uses type inference to improve JavaScript performance by 20-30%. Parent comment

Re:Firefox 9 uses type inference to improve JavaScript perfo... by mrsebastian on Wednesday August 31, 2011 @12:10PM (#2946171)
Yea, I was thinking the same thing.

Chakra (IE9) already has it, I think.

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Re:Firefox 9 uses type inference to improve JavaScript perfo... by jmilloy on Wednesday August 31, 2011 @01:39PM (#2946612)
> Type Optimizations: One of the most important aspects of enabling performance on JavaScript is to create an efficient type system. The IE9 script engine uses many of the techniques common in modern dynamic language implementations, including type representation, polymorphic inline caching (also called type evolution or hidden classes), and efficient implementation of machine types.

http://blogs.msdn.com/b/ie/archive/2010/03/18/the-new-javasc...

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