|Perl Monk, Perl Meditation|
Re^4: Efficient bit-twiddling in Perl.by BrowserUk (Pope)
|on Feb 28, 2013 at 19:58 UTC||Need Help??|
The lookup table generation is 2/10th second, 1-off cost at startup.
Completely insignificant to the cost of the inner loop lookup code that could theoretically be executed 4 billion times. (Once for each 32-bit number.) More typical is mid 100s to low 1000s of millions of times.
A small saving overall, but only one part of the inner loop code I am optimising. Already down from a couple of weeks to ~4 days.
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