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Re: Progressively slow pattern match
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From: |
David Kastrup |
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Subject: |
Re: Progressively slow pattern match |
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Date: |
Wed, 17 May 2006 22:04:20 +0200 |
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User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux) |
Ralf Angeli <address@hidden> writes:
> * David Kastrup (2006-05-17) writes:
>
>> Ralf Angeli <address@hidden> 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
"\\(%[% \t]*\\)foo"
--
David Kastrup, Kriemhildstr. 15, 44793 Bochum