That used to be true, but not anymore. As I already mentioned, there is a new feature that hasn’t been enabled yet called accelerated paint.
In fact I was just running some tests of my own, so that anyone else reading this wouldn’t be basing all their performance stats on only that other guy. I even used the same graphics card and performance website with the flying UFOs…
GTX 1080:
1080p → 60 fps (with and without mouse transparency)
2K → 20 fps (with mouse transparency) 30 fps (without)
ACCELERATED PAINT:
1080p → 60 fps (with and without mouse transparency)
2K → 60 fps (with and without mouse transparency)
If anyone wants to try accelerated paint before it is updated, then all you have to do is change this piece of code and recompile the plugin:
Source\WebBrowserUI\Private\CEF\CEFWebInterfaceBrowserWindow.cpp
