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Arjen Hiemstra 9b3d9e58a4 ScreenEdge: Do not use localtime for measuring duration
Summary:
QDateTime::fromMSecSinceEpoch uses Qt::LocalTime by default. This involves an
expensive localtime conversion. So instead force things to use UTC, as there
is no need for timezone information when tracking durations.

This is especially noticeable on Bedrock Linux, which uses a Fuse mounted
/etc, which is slower than a plain /etc and causes quite some slowdown there.
See https://github.com/bedrocklinux/bedrocklinux-userland/issues/140 for
details.

Test Plan: The screenedge unit test still passes.

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: zzag, anthonyfieroni, davidedmundson, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D27114
5 years ago
..
drm
fbdev
hwcomposer
virtual
wayland
x11 ScreenEdge: Do not use localtime for measuring duration 5 years ago
CMakeLists.txt