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Created attachment 280623 [details] Screen Recording In the breadcrump menu there is a recognizable delay of styling the background color, see attached screencast. At first a different background is applied and then with a delay a darker background. I recognized while debugging that the CSS engine multiple times sets the background color while applying styling with the CSS engine.
Reducing the number of CSS calls of the same widget will be a huge value.
Karsten, is this still the case on the Mac? I cannot see a delay on Linux in the most recent release.
I did not see this with the breadcrumps now. But in general I do observe a kind of flickering sometimes, e.g. in tab folders. The problem I see here is that if multiple styles are assigned to an element, this happens synchronously. So when one style is overridden by another, the first is applied and shortly after the second one. I think we need to come to a more atomic why to apply styles when theming elements.
