bug#46350: 28.0.50; touchpad-scrolling-eats-lots-of-cpu-samples

[Eli Zaretskii]

> From: Andrey Orst <andreyorst@gmail.com>
> Date: Mon, 8 Feb 2021 17:35:51 +0300
> 
> And horizontal scrolling is not laggy with touchpad at all. Well, at least 
> rapid left and right swipes on touchpad
> aren't creating enormous cpu usage.

Horizontal scrolling isn't anywhere as expensive as vertical one.

> - scrolling to buffer end  (down) is less laggy than scrolling to buffer 
> start (up)
> - horizontal scrolling isn't laggy at all
> - this can be achieved with mouse if you roll it with mouse wheel over the 
> table very fast
> 
> If I can produce more information, maybe stack traces, or more in-depth 
> profiling please guide me with some
> instructions. This issue bothered me for about 2 years, just finally decided 
> to report it.

Isn't there some way to control the rate with which the touchpad sends
its events to applications?  Some system-wide setting, perhaps?