From: Alan Mackenzie <acm@muc.de>
Cc: emacs-devel@gnu.org
Subject: Re: Progressively slow pattern match
Date: Wed, 17 May 2006 20:00:18 +0000 (GMT) [thread overview]
Message-ID: <Pine.LNX.3.96.1060517195744.386B-100000@acm.acm> (raw)
In-Reply-To: <87r72sa0s0.fsf@neutrino.caeruleus.net>
On Wed, 17 May 2006, Ralf Angeli wrote:
>* David Kastrup (2006-05-17) writes:
>> Ralf Angeli <angeli@caeruleus.net> writes:
>>> (looking-at "\\(%+\\)*foo")
>[...]
>>> Is this a deficiency in Emacs? Is there a way matching can be sped up
>>> with this or maybe another, equivalent regexp?
>> Uh, "\\(%+\\)?foo" maybe?
>The original regexp looks something like
>"\\(%+[ \t]*\\)*foo"
>in order to match stuff like
>%% %% %% foo
Use "\\(%+[ \t]+\\)%*foo"
^
instead
>Ralf
--
Alan.
next prev parent reply other threads:[~2006-05-17 20:00 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-17 19:33 Progressively slow pattern match Ralf Angeli
2006-05-17 19:37 ` David Kastrup
2006-05-17 19:50 ` Kevin Rodgers
2006-05-17 19:50 ` Ralf Angeli
2006-05-17 20:00 ` Alan Mackenzie [this message]
2006-05-17 21:13 ` Ralf Angeli
2006-05-17 20:04 ` David Kastrup
2006-05-17 20:21 ` Stuart D. Herring
2006-05-17 19:53 ` Alan Mackenzie
2006-05-17 23:13 ` Richard Stallman
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