Re:Red Hat Expecting X.org to “Go into Hard Maintenance Mode...
by Jasper_ on Friday June 28, 2019 @10:46AM
(#20304802)
Partial update is not an improvement for latency in the way you're thinking about it. It's mostly an optimization for tillers so they don't have to rerender some parts.
You seem to broadly misunderstand several parts of the modern display architecture -- the goal you insist any sane window system should provide hasn't been provided by any, including the X Window System.
Apparently there are patches on the way [1] that try to mitigate the severe design flaws of wayland in that regard. If wayland will ever reach X11-like performance remains to be seen. Right now this is not the case.
[1]: https://cgit.freedesktop.org/wayland/weston/commit/?id=df209...