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Re: Grep Speedsby arhuman (Vicar) |
on Feb 06, 2001 at 20:10 UTC ( [id://56681]=note: print w/replies, xml ) | Need Help?? |
What about this one-line ? Here are the main ideas : You read the file only once ! Then you try for each line to match one of your paterns... You don't use backquotes as they spawn a shell and it's very cpu/memory consuming...
Of course it could be optimized (for example I try to match all the remaining patterns even if I got a match, this seems to be unnecessary...) Anyway, IMHO your main mistake is to open/read the file several time !
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