[speex-dev] Real time audio encoding - cpu usage
jean-marc.valin at hermes.usherb.ca
Tue Dec 3 21:12:41 PST 2002
> I would indeed like to know which functions can be used to improve K6-2
> performance through 3DNow.
The functions that would provide the most improvement for the cost
(they're very simple) are:
filters.c: filter_mem2 (N is always dividable by 8 and ord is either
8 or 10)
ltp.c: inner_prod (len is always dividable by 8)
to further improve, you can also do:
Last thing, compiling with -DRELEASE will give you a small improvement
on wideband (16 kHz).
Jean-Marc Valin, M.Sc.A.
Université de Sherbrooke, Québec, Canada
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