[linux-audio-dev] DRC 2.4.0

[Denis Sbragion]

Hello Steve,

At 09.22 27/02/2004 +0000, you wrote:
>Ah. OK. How do the other libraries you're using benchmark against FFTW3?

don't understand if you're referring to my FFT routines or the others. My 
FFT routines are about 10 times slower than GSL FFT, which are about 3 to 4 
times slower than FFTW3, so probaly they are 30 to 40 times slower than 
FFTW3. My FFT routines are far from interesting, apart from being written 
in c++ using the native STL complex dataype and being compact and easy to use.
         The GSL mixed radix FFT is reported to be 3 to 4 times slower than 
FFTW3 in the FFTW3 web sites, the Ooura ones are instead reported as 30-40% 
slower than FFTW3 (they're only radix 2 though), but in my tests they seems 
to be no more than 20-30% faster than GSL mixed radix, so they should be 
much slower than FFTW3. The Ooura website report them as being a little 
faster than FFTW2 (see http://momonga.t.u-tokyo.ac.jp/~ooura/fftbmk.html).
         Don't know if it is the way I use them (I perform really long FFTs 
of complex data, the FFTW3 benchmark instead stops at around 260.000 
items), or just the FFTW3 benchmark that is using different versions, but 
my data don't correlate really well with the FFTW3 benchmarks. Anyway take 
all this data with a grain of salt, these are just my impressions, not 
accurately measured benchmarks, which by itself should be taken already 
with more than a grain of salt.

Bye,
--
	Denis Sbragion
	InfoTecna
	Tel: +39 0362 805396, Fax: +39 0362 805404
	URL: http://www.infotecna.it