Is IE9 32 bit final still faster than 64 bit ?

Q: What does 64bit IE9 get faster JavaScript benchmark scores than IE8 but slower scores than 32bit IE9?

In IE9 there's one other major difference between the 32bit and 64bit versions of IE. IE9 includes a new script interpreter which is much faster than the script interpreter in IE8. However, 32bit IE9 also includes a Just In Time (JIT) script compiler which converts script into machine code before running it. There is no JIT compiler for 64bit IE. So, for benchmarks like SunSpider (and script-heavy sites) 32bit IE9 runs script up to 4 times as fast as 64bit IE9 (which itself runs script around 5x as fast as IE8). So, you could end up paying a significant speed penalty when using 64bit IE9 vs using the default 32bit version..

http://blogs.msdn.com/b/ieinternals/archive/2009/05/29/q-a-64-bit-internet-explorer.aspx

 

 

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Last updated May 16, 2018 Views 2,943 Applies to:

You may find those answers at the IEBlog...

http://blogs.msdn.com/b/ie/archive/2011/05/13/unlocking-the-power-of-html5-lt-audio-gt.aspx

This is a public forum for Internet Explorer issues. Most who answer questions here do not work for or represent Microsoft. I have not seen any of the IETeam answer questions here and they usually restrict replys only to their blog posts.

Regards.

Rob^_^ wang'you

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Does anyone know when there will be a JIT script compiler for 64-bit IE9?

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