GNU bug report logs - #47711
27.1; Deferred highlighting support in `completion-all-completions', `vertico--all-completions`

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From: João Távora <joaotavora <at> gmail.com>
To: Dmitry Gutov <dmitry <at> gutov.dev>
Cc: Daniel Mendler <mail <at> daniel-mendler.de>, Eli Zaretskii <eliz <at> gnu.org>, Stefan Monnier <monnier <at> iro.umontreal.ca>, 47711 <at> debbugs.gnu.org
Subject: bug#47711: bug#48841: bug#47711: bug#48841: bug#47711: [PATCH VERSION 2] Add new `completion-filter-completions` API and deferred highlighting
Date: Tue, 7 Nov 2023 12:13:05 +0000

On Mon, Nov 6, 2023 at 7:39 PM Dmitry Gutov <dmitry <at> gutov.dev> wrote:
>
> On 06/11/2023 18:20, João Távora wrote:
> > On Wed, Nov 1, 2023 at 10:45 PM Dmitry Gutov<dmitry <at> gutov.dev>  wrote:
> >
> >> I guess we should wait a few days to see if anyone has more comments,
> >> and then install this?
> > Five days elapsed, and no more comments came in, so I addressed your
> > comments and Eli's and I pushed this to master as
> > dfffb91a70532ac0021648ba692336331cbe0499.

Here's another place where completion-lazy-hilit could be leveraged:

diff --git a/lisp/minibuffer.el b/lisp/minibuffer.el
index ca2b25415f1..bb2670bccf6 100644
--- a/lisp/minibuffer.el
+++ b/lisp/minibuffer.el
@@ -2067,7 +2067,7 @@ completion--insert-strings
         ;; when the caller uses tabs inside prefix.
         (setq colwidth (- colwidth (mod colwidth completion-tab-width))))
       (funcall (intern (format "completion--insert-%s" completions-format))
-               strings group-fun length wwidth colwidth columns))))
+               (mapcar #'completion-lazy-hilit strings) group-fun
length wwidth colwidth columns))))

 (defun completion--insert-horizontal (strings group-fun
                                               length wwidth
@@ -2378,6 +2378,7 @@ minibuffer-completion-help
          (end (or end (point-max)))
          (string (buffer-substring start end))
          (md (completion--field-metadata start))
+         (completion-lazy-hilit t)
          (completions (completion-all-completions
                        string
                        minibuffer-completion-table

Any objections?  Seems to speed it up when flex is the preferred
completion style outside icomplete.  These are average times
collected from the instrumentation of the above
completion-all-completions when doing a M-: (setq i TAB)

I just used my normal Emacs session for this.

with lazy hilit:      0.104536125
without lazy hilit:   0.172522571

João

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