Subject: Re: bug#78474: 31.0.50; Wrong char insertion in rxvt

From: Eli Zaretskii <[email-masked]>
Date: Thu, 24 Jul 2025 16:22:51 +0300

> From: Robert Pluim <[email-masked]>
> Cc: Eli Zaretskii <[email-masked]>,  [email-masked],
>   [email-masked],  [email-masked],
>   [email-masked]
> Date: Thu, 24 Jul 2025 12:27:44 +0200
> 
> >>>>> On Thu, 24 Jul 2025 09:57:50 +0200, Samuel Thibault <[email-masked]> said:
> 
>     Samuel> It was xterm.
> 
> Eliʼs scrolling test for src/xdisp.c also doesnʼt result in the use of
> many \t\b sequences in any case (121 in my testing, for a 39k line
> file).
> 
> I did the following instead, with a testfile containing 40k lines of
> 01234567cbaaaaaa
> 
> (progn
>   (find-file "src/testfile")
>     (let ((oldgc gcs-done)
>         (oldtime (float-time)))
>       (goto-char (point-min))
>       (condition-case nil
>           (while t (right-char 5) (right-char) (redisplay))
>         (error (message "GCs: %d Elapsed time: %f seconds"
>                         (- gcs-done oldgc) (- (float-time) oldtime))))))
> 
> (this is all over a fast ssh connection, with the underlying terminal
> being iterm2)

How many times was the \t\b sequence used in this test?