Subject: bug#42406: Mouse-wheel scrolling can be flickering

From: Konrad Podczeck <[email-masked]>
Date: Tue, 15 Dec 2020 20:52:25 +0100

Just using the mouse, moving the vertical scroll-bars up and down. As with mouse-wheel scrolling, performance decreases with the number of open frames, in the sense that scrolling becomes more and more sticky.

> Am 15.12.2020 um 20:45 schrieb Eli Zaretskii <[email-masked]>:
> 
>> From: Konrad Podczeck <[email-masked]>
>> Date: Tue, 15 Dec 2020 20:31:19 +0100
>> Cc: Alan Third <[email-masked]>, [email-masked]
>> 
>> Performance does not degrade when only the two calls of wset_update_mode_line you mentioned are commented out. However, with just commenting out these two instances, I still have a scroll performance problem when scrolling by using the scroll-bars. Could you also identify the instance concerning this?
> 
> Please be more specific: how do you scroll with the scroll bars, and
> what kind of performance problem you experience as result of that?