Annoyingly, in order to reliably set QML_NO_TOUCH_COMPRESSION, you have
to do it in the parent process before unity8 or the Qt client is
launched. Because it's only checked once on static initialization:
static bool qquickwindow_no_touch_compression =
qEnvironmentVariableIsSet("QML_NO_TOUCH_COMPRESSION");
So whatever is launching unity8 (upstart job?) has to set
QML_NO_TOUCH_COMPRESSION. And the same goes for Qt apps.
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https://bugs.launchpad.net/bugs/1486341
Title:
[performance] Touch scrolling is stuttery under Unity8 (but only while
you're touching it)
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