GSL fft benchmarks

[Brian Gough]

Steven G. Johnson writes:
 > However, you may want to observe that your radix-2 routines are
 > also less accurate.  The reason for this, as described in our
 > commentary is almost certainly the fact that you generate your
 > trig. factors with a recurrence that is less accurate than the FFT
 > itself.  Realizing that you want to keep it from needing extra
 > storage for the trig. factors, there are a couple of possible
 > solutions:
 > 

Thanks for the references -- I'll see if I can take them into account.

-- 
Brian Gough

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