Optimizing speex (was Re: [Asterisk-Users] Erratic CPU load )

[Steve Kann]

Eric,

    If you want to optimize speex, I'd suggest the following:

1) Re-compile the speex library with SSE optimizations; add --enable-sse 
to the configure line used for compilation.

2) Reduce the "complexity" from 4, to 2 or 3 in codecs.conf.   You won't 
notice the difference in quality.

3) Lower bitrates use less CPU;  try setting abr to 8000, which is a 
good all-around choice; it gives you an average of 8kbps usage, but can 
range from 2-3kbps to 16 kbps or so during simple/complex speech parts.

-SteveK