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theory about differences in speed of memoize and non-memoize patches

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http://kerravonsen.dreamwidth.org/ 2010-11-15 02:01:21 +00:00 committed by Joey Hess
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doc/todo/Improving_the_efficiency_of_match__95__glob.mdwn
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@ -20,6 +20,8 @@ Here's my patch - please consider it! -- [[KathrynAndersen]]
>>>> is less verbose than Kathryn's patch but also not as
>>>> fast; I'm not sure why, tbh. --[[smcv]]
>>>>> I think it's because my patch focuses on match_glob while the memoize patch focuses on `glob2re`, and `glob2re` is called in `filecheck`, `meta` and `po` as well as in `match_glob` and `match_user`; thus the memoized `glob2re` is dealing with a bigger set of globs to look up, and thus could be just that little bit slower. -- [[KathrynAndersen]]
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Benchmarks done with Devel::Profile on the same testbed IkiWiki setup. I'm just showing the start of the profile output, since that's what's relevant.