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bug#4558: forw_comment slowdown since 22.3
From: |
Lars Ingebrigtsen |
Subject: |
bug#4558: forw_comment slowdown since 22.3 |
Date: |
Tue, 01 Oct 2019 15:46:22 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) |
Dan Nicolaescu <dann@ics.uci.edu> writes:
> $ cd emacs/src
>
> $ cat emacs.c emacs.c emacs.c emacs.c emacs.c > /tmp/emacs.c
>
> $ emacs /tmp/emacs.c
> C-x h
> M-;
> C-x C-s
> C-x C-c
>
> $ cat /tmp/t.el
> (defun myfwd ()
> (interactive)
> (dotimes (n 1)
> (while (forward-comment 1))
> (while (forward-comment -1)))
> (save-buffers-kill-emacs))
> ;; increase N if your machine is much faster
>
> Now do:
>
> emacs -Q -l /tmp/t.el /tmp/emacs.c -f myfwd
(I'm going through old bug reports that unfortunately didn't get any
response at the time.)
I've tried this in Emacs 27, and it seems quite fast -- much less than a
second. But, then again, computers are faster now than they were back
when this was reported. Are you still seeing slow forw_comment in more
modern Emacs versions?
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
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Lars Ingebrigtsen <=