[Ffmpeg-devel] [PATCH] lowres chroma bug

[Oleg Metelitsa]

Hello,

TP> I have no idea how to benchmark that function.  Adding an rdtsc to the code
TP> will totally change the register allocation since it clobbers eax and edx.

I  sometimes  compare  patched  function  speed in a stupid way. It is
always  possible  to  write  main()  application,  which  calls tested
function  i.e.  1000 times. Main application can be written such a way
to  make  cache memory operation very similar to real life. After that
it is easy to benchmark 1000 calls of function instead of only 1.

Oleg