Qt bug on macOS: high CPU usage when scrolling library

[foss-]

Qt bug on macOS: high CPU usage when scrolling library

[ronso0]

Dupe of your own report #11603 ?

Some questions came to mind before I discovered #11603:
Please clarify:
does it occur when
a) scrolling by dragging the scrollbars
b) moving the track selection with Up/Down keys (or with [Libary],MoveUp/Down
c) regardless of a/b if the cover column AND library cover art (in the sidebar) are hidden

If it's the b), increasing the track select delay as proposed in #12881 would at least be valid workaround until someone has a solution for the root cause.

[foss-]

#11603 is probably another symptom of the same problem.

So since the description here is more accurate and 11603 only describes a symptom I'd rather set #11603 to duplicate of this issue here.

a) also happens when dragging scrollbar
b) using arrow keys also puts the CPU at 101 %
c) even with cover art in left bottom and library column not showing when scrolling via mouse, scrollbar or arrow keys, CPU goes to 100 %

[m0dB]

Can you try if this makes a difference?

https://github.com/m0dB/mixxx/tree/no-elide