GNU bug report logs - #74561
[PATCH] Allow limiting the size of *Completions*

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From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Spencer Baugh <sbaugh <at> janestreet.com>
Cc: dmitry <at> gutov.dev, 74561 <at> debbugs.gnu.org, juri <at> linkov.net
Subject: bug#74561: [PATCH] Allow limiting the size of *Completions*
Date: Thu, 28 Nov 2024 23:12:59 -0500

> From profiling, the main bottleneck in completion over large
> completion sets is display-completion-list, when there are many
> available candidates.

Hmm... interesting.  I expected it would be the computation of faces
from things like `completion-pcm--hilit-commonality`.

Do you happen to know which part of `display-completion-list` is the
most costly?  is it the actual insertion into the buffer?

I think we should try and fill the buffer lazily.  We don't have much
experience with "jit" populating a buffer (the closest I can think of is
the `vlf` package, which doesn't do "jit", IIRC), so it may take some
trial-and-error until we have something that works, but it
seems worthwhile.


        Stefan

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