[Webkit-unassigned] [Bug 73789] Need SSE optimization for SincResampler::Process()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=73789





--- Comment #7 from xingnan.wang at intel.com  2011-12-04 22:55:47 PST ---
(In reply to comment #4)
> (In reply to comment #2)
> > From my test this optimization got about 45% performance improvement.
> 
> Any idea why such little improvement?

The data is compared with the original impl with unrolling which also has some improvement. And for sse we must handle the address alignment and it produces the memory copy so it pulls down the performance. For the vadd (https://bugs.webkit.org/show_bug.cgi?id=73182) , using similar way, we just get the 100% performance improvement.

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