[Bug 72023] [HSW fbc bisected] cairo performance reduced over 60% by enabling FBC

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72023

--- Comment #9 from Daniel Vetter <daniel at ffwll.ch> ---
Curious question: How much of those 10% can be explained with the additional
memory traffic, presuming that the compressed fb is half the size of the real
one in a back-of-the-envelope estimate (and that we invalidate it every frame)?

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