GNU bug report logs - #14886
Slowdown on font-lock-fontify-buffer

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Package: emacs;

Reported by: Juanma Barranquero <lekktu <at> gmail.com>

Date: Tue, 16 Jul 2013 23:05:02 UTC

Severity: normal

Found in version 24.3.50

Done: Lars Ingebrigtsen <larsi <at> gnus.org>

Bug is archived. No further changes may be made.

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From: Juanma Barranquero <lekktu <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 14886 <at> debbugs.gnu.org, eggert <at> cs.ucla.edu
Subject: bug#14886: Fwd: A significant slowdown calling font-lock-fontify-buffer from a hook
Date: Wed, 17 Jul 2013 13:42:47 +0200

X-Debbugs-Cc: eggert <at> cs.ucla.edu


Anyway, in my original report,

  emacs -Q --eval "(add-hook 'prog-mode-hook
#'font-lock-fontify-buffer)" src/xdisp.c -f kill-emacs

an optimized 24.3 build was slower than a non-opt trunk one (both
compiled with gcc 4.7.2).

However, with your test case, non-opt trunk is 30s slower than non-opt
24.3, and optimized trunk needs less than a third of the time of
non-opt trunk (though glyph assertions are enabled, which could affect
the result)...

A shoot in the dark: Could all this be related to Paul's substitution
of many macros by inline functions?

Paul, WDYT?

    Juanma
This bug report was last modified 5 years and 210 days ago.

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