[Mplayer-users] feature suggestion: video downsampling

Felix Buenemann atmosfear at users.sourceforge.net
Sun Apr 22 15:59:51 CEST 2001

On Sonntag, 22. April 2001 15:41 you wrote:
> On Sun, 22 Apr 2001 14:27:22 +0200 Attila Kinali <kinali at gmx.net> wrote:
> > PS: here the output of ./fastmem.sh
> Sorry, I had xmms running, so the values are not correct.
> k6 : v2-v1=772946064 = 2203478us  (45.383fps)   68.1MB/s
> mmx: v2-v1=730984282 = 2083856us  (47.988fps)   72.0MB/s
> mga-k6 : v2-v1=3201330889 = 9126174us  (10.957fps)   16.4MB/s
> mga-mmx: v2-v1=2329299932 = 6640237us  (15.060fps)   22.6MB/s
> But still, why is *-k6 slower than mmx ?

the benchmark is a little incorrect because mmx doesn't use mmx instructions, 
it's only the code that is used when -DHAVE_MMX is defined but no other like 
-DHAVE_MMX2 or so. Plain said mmx should be named normal or so. K6 code is 
badly coded I think... and special instructions don't neccessarily have to be 
faster than normal instructions.
> 		Attila Kinali

Best Regards,

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