[MPlayer-dev-eng] [RFC] disable fastmemcpy on x86-64 by default

[Piotr Stachura]

> > Tests made on AMD64 3000+ (1.8GHz), gcc 4.1.2 and glibc 2.5.
>
> Did you make several runs? Making around 10 runs, providing mean time
> and smallest time would allow to make sure you're not measuring
> random noise.
> Also, telling what kind of sample you're using may be a good idea.

I made another one. A sample is first 100s of Bleach episode 1 encoded by AHQ 
(h264 640x480). About 7 runs each, best results:

w/o patch:
BENCHMARKs: VC:  15.057s VO:   1.208s A:   0.000s Sys:   0.197s =   16.462s
BENCHMARK%: VC: 91.4647% VO:  7.3400% A:  0.0000% Sys:  1.1953% = 100.0000%

w/ patch:
BENCHMARKs: VC:  15.285s VO:   1.954s A:   0.000s Sys:   0.223s =   17.462s
BENCHMARK%: VC: 87.5324% VO: 11.1913% A:  0.0000% Sys:  1.2763% = 100.0000%

> Ouch. Which vo and what resolution?

as I mentioned "-vo null" that is somehow strange according to VO time. 
Resolution: video 640x480, working 1280x1024 but when null VO then it 
shouldn't matter.

If it matters:

CommandLine: '-quiet' '-benchmark' '-vo' 'null' '-nosound' '001. 死神になっちゃった日 (A 
Shinigami is Born!).mkv' '-endpos' '100' '-v'
Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
VO: [null] 640x480 => 640x480 Planar YV12
*** [ass] Exporting mp_image_t, 640x480x12bpp YUV planar, 460800 bytes
*** [vo] Allocating mp_image_t, 640x480x12bpp YUV planar, 460800 bytes

-- 
Piotr Stachura
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