Re: [Boost-users] C++ Performance

From: nisha kannookadan (nishak44_at_[hidden])
Date: 2007-12-04 08:34:18

>> Normally with numerical stuff, diff wouldn't be easy unless you knock down precision> but, even then you may often want to at least look at the noise. I think this wavelet> transform is invertible and and should be "exact" ( you can transform integers to> integers and invert if you do everything right). In this case, it may be easier to> write an inverse wavelet transform and output the numerical differences between > original and recovered sequences.> > More to the point, at least verify that the suspect code block is really guilty and> try to disassemble it.> > Also, as far as speed, look at something like FFTW ( you can find stuff on google).> They have lots of documentation and discussion posted in various places.> Or, the link I posted earlier to Intel site should help. Don't just count instructions> as memory access patterns can be a much bigger deal- think various shades or> virtual memory. > 
I will do that. Thanx.
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