Re: Question about üarent-frame changes

["Gerd Möllmann" <gerd.moellmann@gmail.com>]

Gerd Möllmann <gerd.moellmann@gmail.com> writes:

> Gerd Möllmann <gerd.moellmann@gmail.com> writes:
>
>> Robert Pluim <rpluim@gmail.com> writes:
>>
>>>     martin> Reparenting is useful because you can set up one child frame for some
>>>     martin> special purpose, make it invisible when you don't need it, and move it
>>>     martin> to another frame and make it visible there whenever you want to.  On
>>>     martin> GUIs, this approach has the advantage that you can avoid the (at least
>>>     martin> here) costly process of setting up frame faces every time anew.  Emacs
>>>     martin> tooltips do that by default and I recall that showing a tooltip every
>>>     martin> time incurred two entire GC cycles here.
>>>
>>> Would setting up frame faces be that expensive on tty? Iʼd really love
>>> to have tty child frames, even if they were not blazingly fast.
>>
>>> From what I've seen so far, it's pretty fast, but OTOH my machine is
>> pretty fast (M1 pro). Let's see how it does when I'm a bit further. At
>> least hiding frames on ttys should be there before I can really try it
>> with posframe. Maybe also moving/resizing also.
>
> I think I can say now that it will probably be faster than on GUI, at
> least on macOS. Running
>
>   (defun my-make-child ()
>     (interactive)
>     (make-frame `((parent-frame . ,(selected-frame))
>                   (background-color . "gray10")
>                   (foreground-color . "white")
>                   (top . 15)
>                   (left . 40)
>                   (width . 80)
>                   (height . 25))))
>
>   (defun my-time-child ()
>     (interactive)
>     (dotimes (i 500)
>       (let ((f (my-make-child)))
>         (sit-for 0)
>         (delete-frame f))))
>
>   (benchmark-run 1 (my-time-child))
>
> shows 24s with GUI, and 8s on tty. I'm using Alacritty, in case that matters
> (for the KKP keyboard support, not for performance).

Small correction - I had timed tty build with debug. It's actually 2s
instead of 8s.