[Speex-dev] MKL Patch

Alexander Chemeris Alexander.Chemeris at sipez.com
Tue May 27 11:38:32 PDT 2008


On 5/27/08, Thorvald Natvig <thorvald at natvig.com> wrote:
>  And here's a patch for Intel Math Kernel Library. This allows commercial
> users of Speex to use a high-speed FFT library that isn't GPL'd. (You do
> need to pay for it though). This is 3 times faster than the default FFT in
> speex, and also faster than FFTW3 since MKL has native support for the
> complex packing Speex uses.

That's definitely cool, but from what I can see on this FAQ I do need to pay
if I'm willing to use it for commercial purposes:

Btw, have you benchmarked speex with this and without this optimization
as a hole and how much percents do you achieve? I assume FFT is a big
portion of Speex's CPU load, but it would be great to see numbers. :)

Alexander Chemeris.

SIP VoIP, IM and Presence Consulting
tel: +1 (617) 273-4000

More information about the Speex-dev mailing list