Re: Emacs-26.0.91: switch-to-buffer-other-window runs too slowly (about 0.1s)

[Eli Zaretskii]

> From: zhang cc <address@hidden>
> Date: Mon, 26 Mar 2018 10:12:33 +0000
> 
> 1. start emacs with “emacs -Q” 
> 2. eval the following form:
> (progn
>   (setq ddd-tm (current-time))
>   (switch-to-buffer-other-window "*Messages*")
>   (message "ddd: %ss"  (float-time (time-subtract (current-time) ddd-tm))))
> 
> The result is lager than 0.1s on my machine. This makes undo-tree running too 
> slowly, because it calls
> switch-to-buffer-other-window twice per undo.

I cannot reproduce this.  I get zero seconds.

Does this happen in "emacs -Q -nw"?