[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 #9 from marmuta <marmvta at gmail.com> ---
Thanks for the hints, that helped. Apparently deep nesting happens when
patterns are shared between contexts. I'm not sure if this was a save thing to
do at all. I've switched them to surfaces and now there are no high index
values in the trace anymore. 
I had hopes, but unfortunately this did nothing for the performance issue, it
may even do slightly worse.

Bypassing the driver does make a difference, though:
$ ./onboard
draw             13635.882ms

$ GDK_RENDERING=image ./onboard
draw              1371.348ms

That number is the initial caching plus the first redraw. That's probably
already good enough for the startup, but not yet for all later interaction.
>From there on python/python-gi show up as bottlenecks too.

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