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From: Hrvoje Niksic <hniksic@srce.hr>
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Subject: Re: Regular expression performance in emacs, number of cached regexps
Date: 17 May 1998 21:33:15 +0200
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Kai Grossjohann <grossjohann@charly.cs.uni-dortmund.de> writes:

> >>>>> gsstark@mit.edu (Gregory S. Stark) writes:
> 
>   > [...] If I recall correctly, Emacs cached the five most recently
>   > used compiled regular expressions, and I was looping through about
>   > six or seven. So Emacs was repeatedly recompiling the same six or
>   > seven regular expressions and allocating memory only to be thrown
>   > away as garbage shortly later, causing excessive regular
>   > expression compilations and garbage collections. [...]
> 
> I think I read that the limit has been increased to maybe 20 or so in
> a more recent Emacs (the yet to be released 20.3?).

Yes.  So did XEmacs, a few releases ago.

(see definition of REGEXP_CACHE_SIZE in `src/search.c'.)

> But I'm sure RMS knows best :-)

Ha ha ha.

-- 
Hrvoje Niksic <hniksic@srce.hr> | Student at FER Zagreb, Croatia
--------------------------------+--------------------------------
Be nice to your kids.
They'll choose your nursing home.