[Bug 77436] KDE Konsole very slow scrolling with TearFree and QT graphics system native

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=77436

--- Comment #164 from Chris Wilson <chris at chris-wilson.co.uk> ---
Ah, I have an idea that would account for the glyph discrepancy - it is as if
your aa glyphs miss the fast path entirely. That explains why both aa and rgb
glyphs are the same speed as well, and why the impact of the extra damage
tracking for a compositor doesn't affect performance much.

So I guess the characteristic of the slowdown on your machine is going to be
best modeled by rgb24text.

And that as far as I can see, everything is in order with your hardware - it
just seems to be a particularly brutal rendering path for your GPU.

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