Hi, One of the biggest problems when working with JavaFX is that if you reparent a big portion of the SceneGraph is that a full CSS-Pass is applied on all reparented SG-Nodes even if those nodes are currently not visible (eg. because they are part of a TabPane).
I general I think it is ok to also applyCSS changes on currently not visible nodes (eg they still have an influence on layout-bounds) but there are situations like the above mentioned example of TabPane that it is unnecessary overhead to apply applyCSS changes on those parts of the SG until they get visible. I would not mind if the CSS-Pass on JavaFX would be as performant as the one from current browsers but unfortunately it isn't so I'd like to discuss the possibility of a API to *temporarily* exclude portions of the SG from CSS-Passes. In JavaFX8 i was able to hack that in by overwriting impl_processCSS in a subclass who changed to doProcessCSS who now is private so my hack does not work anymore. To give you an impression on what performance gains we are talking about just look at the video I recorded - https://tomsondev.bestsolution.at/2016/11/25/improving-minmax-performance-in-e4-on-javafx-applications/ Tom -- Thomas Schindl, CTO BestSolution.at EDV Systemhaus GmbH Eduard-Bodem-Gasse 5-7, A-6020 Innsbruck http://www.bestsolution.at/ Reg. Nr. FN 222302s am Firmenbuchgericht Innsbruck
