From: wmperry@aventail.com (William M. Perry)
Cc: gsstark@mit.edu, ding@gnus.org, w3-beta@indiana.edu
Subject: Re: Regular expression performance in emacs, number of cached regexps
Date: 19 May 1998 08:52:19 -0500 [thread overview]
Message-ID: <86som6jrl8.fsf@kramer.bp.aventail.com> (raw)
In-Reply-To: Richard Stallman's message of "Mon, 18 May 1998 22:45:12 -0600"
Richard Stallman <rms@santafe.edu> writes:
> Well, as people are wont to say nowadays - memory is cheap, and so is
> disk. If I'm reading the code right, the regexp cache only takes 398
> bytes (worst case on a 64bit machine)... so 20 cache entries are only
> 7960 (~ 7.75k).
>
> There must be a misunderstanding, because the data in a cache entry has
> variable size. Perhaps you're looking only at the cache structure itself
> and not its contents.
I was assuming this was fairly small - how bad could a pathological posix
regexp get? :) Another 64k total? Megabytes? I've never delved too much
into the internals of regexp matching - it scares me.
-Bill P.
next prev parent reply other threads:[~1998-05-19 13:52 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-05-17 17:49 Gregory S. Stark
1998-05-17 19:20 ` Kai Grossjohann
[not found] ` <vafhg2o1z7k.fsf@ramses..cs.uni-dortmund.de>
1998-05-17 19:33 ` Hrvoje Niksic
1998-05-18 5:29 ` Richard Stallman
1998-05-18 15:49 ` William M. Perry
1998-05-19 4:45 ` Richard Stallman
1998-05-19 13:52 ` William M. Perry [this message]
1998-05-20 1:38 ` Richard Stallman
1998-05-20 6:43 ` Dale Hagglund
1998-05-20 11:47 ` William M. Perry
1998-05-21 7:13 ` Richard Stallman
1998-05-19 7:55 ` Jan Vroonhof
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