Two things worth noting:
1. arale performance is quite poor, and we've known this for a long
time. I mean the device itself. Its frequency governor keeps clock
speeds so low for so long what frame rates rarely appear smooth (see bug
1488386). This is however a bug in the arale kernel drivers and not a
bug in Mir or Unity8 that we can easily work around.
2. Are you sure 20-30% counts as high or a bug on this particular
device? CPU usage varies wildly between graphics drivers and sometimes
high CPU for constantly rendering is unavoidable. A good example is
desktop -- you will find the Intel graphics driver uses very little CPU
whereas Nvidia will use large amounts of CPU. Whether this is a bug or a
feature that allows the driver to improve performance internally is not
a question we can easily answer.
I'm not sure this is a Mir bug at all, or something we can improve in
the above components at least.
** Changed in: mir
Status: New => Incomplete
** Changed in: mir (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1599649
Title:
High CPU usage on arale when running simple clients with animations
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