[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 #102 from Ildar Nurislamov <absorbb at gmail.com> ---
Im not sure. Situating is changing continuously. I mean i forgot which font i
used before. But i see now that it depends on font too: DejaVu Sans Mono is
much faster then Droid Sans Mono or Liberation Mono. And depends on composting
engine also:
Now im on DejaVu Sans Mono 9pt and Xrender lags when OpenGL is fast.

>Do the characteristics of the lag remain the same -- very longs waits whilst stalling for memory (GAM)?
Looks like. But harder to acheive. And waits ms is lower.

Hm. I caught total hang maybe because of using OpenGL or gpu-overlay so i had
to restart. After restart everything little bit slower again. It seems i need
to do all the window switch, font change magic again.

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