[XviD-devel] Change 2 bits <-> 2 percent speedup

Christoph Lampert chl at math.uni-bonn.de
Tue Feb 18 16:42:36 CET 2003


Hi,

please try thing on your machine: 

When I changed in portab.h 

#define CACHE_LINE 16 

to

#define CACHE_LINE 32 

XVID got faster by 2 percent. This was on Pentium3 where cacheline
actually _is_ 32 byte. On Athlon or P4 you might want to try 64 
(changing even 4 bits). 

gruel 





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