GNU bug report logs - #71961
[PATCH] Improve tab-line-tabs-fixed-window-buffers performance

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From: Jeremy Bryant <jb <at> jeremybryant.net>
To: Eval Exec <execvy <at> gmail.com>
Cc: 71961 <at> debbugs.gnu.org, Juri Linkov <juri <at> linkov.net>
Subject: bug#71961: [PATCH] Improve tab-line-tabs-fixed-window-buffers performance
Date: Sun, 07 Jul 2024 21:32:10 +0100

Eval Exec <execvy <at> gmail.com> writes:

> Hello,
> After noticing severe lag when `buffer-list` exceeds 1000 buffers,

1000?

> particularly
> with `tab-line-switch-to-prev-tab` and `tab-line-switch-to-next-tab`,
> a profiler
> revealed that the sorting operation in
> `tab-line-tabs-fixed-window-buffers` heavily
> relies on the `seq-position` function. This reliance significantly
> impacts performance.
> To address this, I have proposed a patch to optimize the buffer
> sorting mechanism within
> `tab-line-tabs-fixed-window-buffers`. The solution involves replacing
> the inefficient
> `seq-position` calls with a hash table to cache buffer positions,
> which markedly
> enhances performance when handling large buffer lists.
>
> This is my first attempt at hacking Emacs. Do you have any suggestions
> on this idea?

Adding Juri to this bug report

>
> Thank you
>
> [2. text/x-patch; 0001-Improve-tab-line-tabs-fixed-window-buffers-performan.patch]...

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