[Ffmpeg-devel] [PATCH] SSE counterpart of ff_imdct_calc_3dn2

Zuxy Meng zuxy.meng
Fri Aug 25 03:02:01 CEST 2006


2006/8/25, Uoti Urpala <uoti.urpala at pp1.inet.fi>:
> Recent vorbis commit messages mention a 0.5% overall vorbis speedup from
> converting intrinsics to inline asm, and a 0.5% overall vorbis slowdown
> from supporting older gcc versions. So that's an order of magnitude more
> slowdown than you said they caused "at worst", and a counterexample to
> your claim that using intrinsics instead of asm would cause over 1%
> slowdown.

0.5% difference is too small. Switch to another CPU or another version
of gcc and the result may change.

Beauty is truth,
While truth is beauty.
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