[Bug 68524] radeonsi with glamor has very poor performance with primitives drawing

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=68524

--- Comment #6 from Michel Dänzer <michel at daenzer.net> ---
(In reply to comment #4)

Zhigang, note that the radeon driver passes GLAMOR_USE_SCREEN and
GLAMOR_USE_PICTURE_SCREEN to glamor_init(), so software rendering fallbacks are
handled entirely within glamor, which incurs a lot of overhead in some cases
such as the gtkperf Lines test.

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