Re: [Pound Mailing List] multiple URLs configured on Pound not working

Robert Segall <[email protected]>
Newsgroups gmane.comp.web.pound.general
Organization Apsis GmbH
Message-ID <[email protected]>
On Mon, 2013-07-01 at 20:31 +0000, Joe Gooch wrote:
> ... Then it’s a single regex match.  (Albeit a complicated one… I’ve never benchmarked 1000 regex_matches vs a pattern with 1000 ors)

A regex match runs in O(len(S)), where S is the string being matched.
The complexity of the pattern makes no real difference, it is compiled
to an optimised finite state machine. You pay a few bytes in memory
usage, but at runtime it is just a table look-up.

1000 regex matches would be 1000 times slower!
-- 
Robert Segall
Apsis GmbH
Postfach, Uetikon am See, CH-8707
Tel: +41-32-512 30 19


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