bug#45379: 28.0.50; Degraded Performance of describe-buffer-bindings

[Eli Zaretskii]

> From: Stefan Kangas <stefan@marxist.se>
> Date: Sun, 7 Mar 2021 03:12:17 -0500
> Cc: styang@fastmail.com, juri@linkov.net, rudalics@gmx.at, 
>       45379@debbugs.gnu.org, monnier@iro.umontreal.ca, stephen.berman@gmx.net
> 
> > So could you please walk us through the proposed changes, adding
> > explanations for each part as you go?
> 
> Yes.  Please allow for at least a couple of days to write this up.

Sure.  There's no rush, please take your time.

> > (And what do char-tables have to do with describing key bindings,
> > btw?)
> 
> Full keymaps are char-tables, while sparse keymaps are just lists.
> 
> The call stack looks like this:
> 
> Fdescribe_buffer_bindings [keymap.c]
> -> describe-map-tree      [help.el]
> -> describe-map
> -> Fhelp__describe_vector [keymap.c]
> -> describe_vector

Got it, thanks.