fastmath library?
Alex Martelli
aleaxit at yahoo.com
Fri Nov 17 12:13:46 EST 2000
"Michael Hudson" <mwh21 at cam.ac.uk> wrote in message
news:m3g0kqr9mr.fsf at atrus.jesus.cam.ac.uk...
[snip]
> Hmm... you didn't post your dummy function! Anyway, I bet actually
Oops, sorry, it was
def dummy(somefloat):
return somefloat
> computing the sin of the argument is still dwarfed by the function
> call mechanism,
Not exactly -- calling math.sin is more than twice as slow as
calling dummy. That's not "swamping" in my book...
> so even if you have a fast C memoization/lookup thingy
> then you aren't likely to save even 50% of the call cost. I could be
Definitely not more than that (on a Pentium-II or similar).
> wrong, though (and am more likely to be on machines without an FPU).
Sure, everything changes if you don't have an FPU.
Alex
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