Author: Sune Fischer
Date: 06:46:25 05/28/02
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On May 28, 2002 at 09:22:46, José Carlos wrote: >On May 28, 2002 at 09:03:45, Sune Fischer wrote: > >>On May 28, 2002 at 08:42:52, José Carlos wrote: >>> >>>>These dayes 150 kB is nothing, I feel I can afford it better than an "if" that's >>>>wasted 99.99% of the time. >>> >>> Just out of curiosity, how much slower is your program with the "wasted if"? >>>Did you measure it? >> >>Actually no, I didn't. >>But why put it in when its not needed? >>It's at least 100.000 redundant if's per second, isn't it? >>Pretty expensive safety check IMO. >> >>-S. >> >>> José C. > > My last advice, I won't insist :), I swear: Test, don't guess. Heh. I don't test every line I change, usually changes are too small to detect, I rely largely on logic, intuition and a few quick calculations: Speed is around 400 knps, on a 1 GHz Athlon and that's about 2500 clocks per node, if one "if" is 1 clock then that's 1/2500 speedup. Hard to measure, but its there. -S. > José C.
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