> > I don't have access to the OpenJDK bug tracker so I can't file a bug > report for this >
You can do it at https://bugreport.java.com/bugreport/ On Sun, Nov 4, 2018 at 9:18 PM Mike Hearn <m...@plan99.net> wrote: > I'm on macOS High Sierra with a very new and very high end MacBook Pro. > > I have a pretty basic GUI that uses translucency fairly aggressively. I > added a DropShadow effect to some nodes, which looks great, but to my great > surprise this one line of code kills the UI performance not of my app, but > other apps on the same machine, specifically: > > - I can see the frame rate of the dock's zoom animation is lower > - Chrome becomes nearly unusable. Opening a new tab goes from nearly > instant to sluggish, this is very noticeable if you watch the tab in the > tab strip itself expand. It goes from smooth and fast to being able to > see > the individual frames. > > Stopping my app immediately restores the other apps to full framerate. So > presumably, the DropShadow shader is triggering some slow path not only in > JavaFX but the GPU or driver itself. I've experimenting with caching and > that speeds up scrolling of nodes with drop shadows in my own app, but the > OS-wide slowdown remains. > > Has anyone seen anything like this before? I'm suspecting that I'll need to > render my own drop shadow effect using static bitmaps to work around it. > > I don't have access to the OpenJDK bug tracker so I can't file a bug report > for this and I'm not sure how to reproduce it reliably. It's the first time > I noticed it. >
