Yes, unity 5.12-ubuntu1.1 helps. But the Unity performance is still
unedifying.

Ubuntu (3D):
# Moving windows is and fading effects are still very jerky.
# glxgears runs at 30 fps
# glxgears -fullscreen crawls most of the time at 5 fps but sometimes jumps up 
to 18 fps.

Ubuntu 2D:
# Moving windows feels like it was before in 10.04. The window moves together 
with the pointer, no more drag but not smooth.
# glxgears runs at 60 fps and seems to be limited by the screen refresh rate. 
Good!
# glxgears -fullscreen still crawls along with 4.7 fps.

I know that glxgears is not a proper benchmark but it is an application
with simple 3D graphics and should run smoothly.

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https://bugs.launchpad.net/bugs/931122

Title:
  3D performance is very bad

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