Re: Flicker on MS Windows

[Eli Zaretskii]

> From: Po Lu <luangruo@yahoo.com>
> Cc: emacs-devel@gnu.org
> Date: Mon, 07 Mar 2022 22:04:46 +0800
> 
> It's an optimized build, with "-O2 -g3".

And is this in "emacs -Q"?

> BTW, here's another way to reproduce some severe flicker on MS Windows:
> just type "M-: (run-hooks 'xref-after-jump-hook) RET", and the tool bar
> buttons, cursor and text start to flicker severely.  The tool bar
> buttons flicker in a peculiar way: the background is displayed, but the
> image itself flickers with interleaved bands of black.

I don't see any flickering here, after the above.  The window
recenters and I see a single line pulsed; that's all Moreover, Emacs
consumes exactly zero CPU cycles after evaluating that expression.

How long does it keep flickering after you evaluate the above form?
And what is the value of xref-after-jump-hook in your case?

> It's also not affected by the setting of w32-use-visible-system-caret.

It shouldn't be, AFAIU.