Re^2: pattern matching with large regex

in reply to Re: pattern matching with large regex
in thread pattern matching with large regex

Looping will be slower? According to simonm, matching multiple times is faster than a single super-match. Only a benchmark of actual data will show for sure, but I've seen it said on PM many times already that multiple smaller matches are faster than single larger-matches. I'm presuming that simpler FSMs combined with less ability to backtrack has something to do with it. I'm not entirely sure, though.

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Re^3: pattern matching with large regex by CountZero (Bishop) on Aug 13, 2005 at 18:17 UTC
Indeed only benchmarking will do, as a lot depends on the data-set (are the regexes anchored or not; is there room for a lot of back-tracking, ...). CountZero "If you have four groups working on a compiler, you'll get a 4-pass compiler." - Conway's Law	[reply]

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