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bug#21131: minibuffer repl delay

From: Andreas Schwab
Subject: bug#21131: minibuffer repl delay
Date: Sat, 25 Jul 2015 08:44:43 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux)

Chris Stacy <address@hidden> writes:

> But doing the same thing in the minibuffer (eval-expression)
> incurs a huge delay after I hit ENTER and before seeing the answer.
> For example, the above expression took over 7 seconds before I saw:
> 2117 (#o4105, #x845)
> I can't tell if it is just arithmetic because the delays seem to random.

It comes from trying to render the number as a character, and it can
take some time to find a font that contains this character, if any.

> Sometimes there doesn't seem to be a delay.
> This always comes back right away:
> (length '(a b c d e))
> 5 (#o5, #x5, ?\C-e)

5 isn't a printable character, so it is rendered as ?\C-e.


Andreas Schwab, address@hidden
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