[cairo-bugs] [Bug 56891] Very slow rendering on ASUS Nexus 7, ARM, Tegra 3

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=56891

--- Comment #7 from marmuta <marmvta at gmail.com> ---
Hmm, there shouldn't actually be more than five or so nesting levels, the first
probably being GTK's double buffering. How can I read the levels from the
trace? I assumed it somehow repeats at Observing
'/home/ubuntu/onboard.trace'...., are those nesting levels too?
Most of the nesting happens only occasianally, i.e. on startup, resizing, etc.
and is then masked to the main context all other times. Drawing all the keys at
once with shadows and gradients turned out too slow even on non-mobile devices,
hence all that caching. 

Driver quality is what I'm afraid of. Would that explain why the image backends
in the first attachment are so much faster than cairo-xlib?

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