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Re^4: code optimization

by Anonymous Monk
on Nov 05, 2011 at 00:13 UTC ( #936057=note: print w/replies, xml ) Need Help??


in reply to Re^3: code optimization
in thread code optimization

Profilers can lead to false optimizations because your measuring the overhead of recording the timings (OS interrupts/OS calls/context switches/mutex hits/evals/method resolution) or 1 run if the func is below the OS timer resolution. I took nytprof to these subs and nytprof changed which is the fastest sub which is no good.

Well, Benchmark isn't exactly a profiler, and reinventing Benchmark seems like a particularly pedestrian thing to reinvent, and the overhead is accounted for

But, regarding NYTProf, I don't get the argument, its not as if it is Benchmark :)

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[1nickt]: Corion I feel that way a lot when I look at the news...
[1nickt]: Brethren, I just noticed in the CPAN ticker Retry, which led me to Attempt, by Mark Fowler. Does anyone have experience with either of these utilities?
[Corion]: No. Back when I toyed with the idea, I found that writing the loop explicitly was usually less code than passing the configuration+ callback to the retrier...

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