[XviD-devel] Request: optimized version of image_setedges

[Christoph Lampert]

Hi,

I just saw in profiling SMP that  image_setedges()  is one
of the slowest parts in XviD now. I doubt that this is needed!

I guess the reason is many loops and many calls to library functions
memcpy/memset for very small memory blocks of 32 or even 16 bytes, which
could be done by loop onrolling or MMX-copy much faster. 

There could be a fixed "copy 16 bytes by MMX" inlined function and
something tricky for memset(), too. However, I don't know enough
MMX/assembler for that.

Anyone else?

Christoph 

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