From: Dan Nicolaescu <dann@ics.uci.edu>
To: Kenichi Handa <handa@m17n.org>
Cc: 4222@emacsbugs.donarmstrong.com
Subject: bug#4222: calls to char_table_ref slow down 23.1 (vs 22.3)
Date: Fri, 21 Aug 2009 00:08:17 -0700 (PDT) [thread overview]
Message-ID: <200908210708.n7L78H1W016981@godzilla.ics.uci.edu> (raw)
In-Reply-To: <E1MeNhS-0002Wd-7T@etlken> (Kenichi Handa's message of "Fri, 21 Aug 2009 15:34:10 +0900")
Kenichi Handa <handa@m17n.org> writes:
> > Take src/config.h run C-x r t on it to insert a space in front of each
> > line.
>
> > Then build both emacs-23.1 and 22.3 with profiling enabled (-O2 -g -pg).
> > Then run:
>
> > emacs -Q -nw config.h
> > M-: (indent-region (point-min)(point-max)) RET
> > C-x C-c
> [...]
> > It can be seen that 23.1 is quite a bit slower, and that it has a lot of
> > extra calls to char_table_ref.
>
> > Is there some easy way to reduce the number of those calls?
>
> Please find which char-table is referred so many times.
Unfortunately I am not familiar with this code at all...
Setting a breakpoint in char_table_ref and examining `table' there show
this:
(struct Lisp_Char_Table *) 0x8863fb0
Purpose: "syntax-table" 0 extra slots
next prev parent reply other threads:[~2009-08-21 7:08 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-21 5:18 bug#4222: calls to char_table_ref slow down 23.1 (vs 22.3) Dan Nicolaescu
2009-08-21 6:34 ` Kenichi Handa
2009-08-21 7:08 ` Dan Nicolaescu [this message]
-- strict thread matches above, loose matches on Subject: below --
2009-09-18 23:30 Chong Yidong
2009-09-19 4:43 ` Dan Nicolaescu
2009-09-19 5:37 ` Kenichi Handa
2009-09-24 4:05 ` Kenichi Handa
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