[FFmpeg-devel] Loongson Optimization Patchs Submitting Question - new branch of mipsel64
Reimar.Doeffinger at gmx.de
Tue Mar 24 21:46:29 CET 2015
On Fri, Mar 20, 2015 at 04:06:56PM +0800, 周晓勇 wrote:
> The optimization mainly include libavcodec, libavutil, and mplayer's fast_memcpy.
Note that fast_memcpy for 720p and above really is only a bad workaround
against horrible libc implementations.
I can only strongly recommend to fix the libc implementation of memcpy,
for resolutions of 720p and above there is no excuse for the libc memcpy
being slower than a well optimized fast_memcpy.
You really don't want to end up in the same ridiculous situation as
PowerPC where everyone who wants good performance has to re-implement
the standard C library because nobody could be bothered to do things
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