[Bug 71523] [IVB/HSW/BYT-M bisected] lightsmark v2008 performance reduced ~30%

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=71523

--- Comment #1 from Fredrik Höglund <fredrik at kde.org> ---
The most likely explanation is the overhead from computing the gl_client_arrays
in _mesa_update_state(). Lightsmark makes a lot of calls to glDrawElements()
each frame, and changes the vertex arrays between those calls.

That being said, I can't reproduce the regression with r600g. I get
approximately 115 FPS with and without the ARB_vertex_attrib_binding changes.

Could you investigate further?

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