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Re^2: Null-stripping performance

by Thelonius (Priest)
on Feb 26, 2007 at 14:37 UTC ( #602130=note: print w/replies, xml ) Need Help??


in reply to Re: Null-stripping performance
in thread Null-stripping performance

On my PC, The "substr(), y" method takes about 0.6 microseconds, the "substr(), s" method takes about 1 microsecond, the "unpack x$index" method takes about 2 microseconds.

The "unpack a$index" method takes about 41 microseconds (when averaged over a 262000 byte string), so it's the one to avoid. It has to allocate the large substring it skips over before it throws it away.

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Re^3: Null-stripping performance
by qiau (Initiate) on Feb 26, 2007 at 17:19 UTC
    Thanks a lot. I really appreciate your help! I can mention, as a parenthesis, that this code is going to run in sparc solaris-environment. When I tried the script at my PC perl took care of the null's by itself and just the substr worked fine. I guess I have to live with the time it takes to do it "substr(),y"-way. Thanks again

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[Corion]: ambrus: Hurr - yes, that might happen, as Prima will queue lots of stuff (Well, Windows will)
[Corion]: But I'm really amazed that it just took this little code (plus the idle handler I have in mind and something else dk suggested)
[Corion]: ambrus: I wrote the handler so that it stops the timer if it's supposed to be a one-shot
[Discipulus]: are you using Prima Corion? good morning Corion and ambrus, btw

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