Thanks a lot for the patch, feel free to let me know which version I could build and test.

On Mon, Sep 1, 2025 at 6:06 PM Eli Zaretskii <eliz@gnu.org> wrote:

> Date: Mon, 1 Sep 2025 10:37:32 +0200
> Cc: pitometsu@gmail.com, 79351@debbugs.gnu.org
> From: martin rudalics <rudalics@gmx.at>
>
>  > That was because of performance issues, right?  I see nothing in that
>  > discussion that objects to the character-level dragging in principle.
>  >
>  > I see no reason not to allow that as an option.  Patches welcome.
>
> I attach a patch supposed to fix your earlier
>
>   According to the manual, window-resize-pixelwise = nil is what you
>   want.  However, it currently doesn't affect dragging the window border
>   with the mouse, AFAIU.  Martin, am I right?  This could be a simple
>   omission.
>
> But it's still sluggish as back in 2014, the mouse cursor moves far
> ahead of the lines to drag and it refuses to move a mode line with
> 'mouse-fine-grained-tracking' non-nil.  Likely remember_mouse_glyph
> interferes here.

Thanks.  I hope Yurii will be able to try the patch and see if it
satisfies him.