[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

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #143 from Chris Wilson <chris at chris-wilson.co.uk> ---
It's not the only pathological renderer! I still think something is subpar and
anomalous about the behavior on your machine, but this bug has gone on long
enough...

For reference, can you please run

x11perf -aa10text -aa24text -rgb10text -rgb24text

under the various compositor guises (TearFree, vsync, vsync+TearFree, etc).

For reference on my baby ivb, with tear-free enabled and bare X I get:

Sync time adjustment is 0.0324 msecs.
200000000 trep @   0.0001 msec (7920000.0/sec): Char in 80-char aa line
(Charter 10)
112000000 trep @   0.0003 msec (3850000.0/sec): Char in 30-char aa line
(Charter 24)
120000000 trep @   0.0003 msec (3280000.0/sec): Char in 80-char rgb line
(Charter 10)
32000000 trep @   0.0011 msec (871000.0/sec): Char in 30-char rgb line (Charter
24)

and without:

Sync time adjustment is 0.0328 msecs.
280000000 trep @   0.0001 msec (10200000.0/sec): Char in 80-char aa line
(Charter 10)
112000000 trep @   0.0002 msec (4130000.0/sec): Char in 30-char aa line
(Charter 24)
120000000 trep @   0.0003 msec (3400000.0/sec): Char in 80-char rgb line
(Charter 10)
32000000 trep @   0.0011 msec (890000.0/sec): Char in 30-char rgb line (Charter
24)

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