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Re: Info is slow in Emacs 22.0.50

From: Juri Linkov
Subject: Re: Info is slow in Emacs 22.0.50
Date: Mon, 13 Jun 2005 09:08:08 +0300
User-agent: Gnus/5.110004 (No Gnus v0.4) Emacs/22.0.50 (gnu/linux)

>> These results indicate that the main source of the slowdown is the
>> menu items fontification code in `Info-fontify-node', and it is caused
>> by a large amount of Info menu items needed to be processed.
> While I still don't understand where the slowdown actually comes from
> (e.g. why do 1559 calls to put-text-property take 0.01s with -Q -D but then
> take 5.46s with a loaded .emacs?  Also more than half the elasped time is
> unaccounted for in the profile of the pathological case), we can always try
> and move some of Info-fontify-node into font-lock-keywords where jit-lock
> should help us stay nice and responsive.

Definitely worth trying.  But before doing that I want to understand
why in `emacs -Q -D' this is faster.

Juri Linkov

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