https://bugs.freedesktop.org/show_bug.cgi?id=63732
--- Comment #5 from Michel Dänzer michel@daenzer.net --- (In reply to comment #2)
I must say that I don't have any problem with kwin (but kwin is too slow for me).
FWIW, there is no inherent reason why kwin using full OpenGL should be slower than kwin_gles, but there is a kwin bug where it uses MSAA when it shouldn't. Supposedly that's fixed in current current kwin snapshots.