GNU bug report logs - #26525
`sit-for' in Flyspell slows typing down, hogs 90% of CPU

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Message #8 received at 26525 <at> debbugs.gnu.org (full text, mbox):

From: Clément Pit-Claudel <cpitclaudel <at> gmail.com>
To: 26525 <at> debbugs.gnu.org
Subject: Re: `sit-for' in Flyspell slows typing down, hogs 90% of CPU
Date: Sat, 15 Apr 2017 16:33:56 -0400

The relevant piece of code seems to be this:

      (cond
       ((get this-command 'flyspell-deplacement)
	(not (eq flyspell-previous-command this-command)))
       ((get this-command 'flyspell-delayed)
	;; The current command is not delayed, that
	;; is that we must check the word now.
	(and (not unread-command-events)
	     (sit-for flyspell-delay)))
       (t t)))

But the condition and the comment seem at odds, and it doesn't say much about why it calls `sit-for`.

Clément.

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