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Re: latexenc-find-file-coding-system is slow.

From: Lute Kamstra
Subject: Re: latexenc-find-file-coding-system is slow.
Date: Fri, 29 Apr 2005 19:19:29 +0200
User-agent: Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux)

Arne Jørgensen <address@hidden> writes:

> Stefan Monnier <address@hidden> writes:


>> - use (re-search-forward "\\\\usepackage\\[\\(.*\\)\\]{inputenc}")
>>   and once it matched, check if it's inside a comment.  This should be
>>   *much* faster because of how the regexp-engine works (basically,
>>   it will backtrack much less).  The search as it is coded now could very
>>   well fail with "regexp stack overflow".


> Lute Kamstra <address@hidden> writes:


>> Another idea is to change the regexps and search only for
>> \inputencoding{...} and \usepackage[...]{inputenc} at the start of a
>> line.  That's where they typically are.  This will speed up the search
>> dramatically.
> That would probably be an ok compromise (between what is actually
> legal LaTeX and what is normally used). But the other approaches can
> do the trick I would prefer to avoid this.

You can avoid it by using Stefan's suggestion above.  It is probably
faster than my idea, but a bit more work to implement.


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