NEW180282
Increased flakiness in layout tests when timer latency increased. 
https://bugs.webkit.org/show_bug.cgi?id=180282
Summary Increased flakiness in layout tests when timer latency increased.
Per Arne Vollan
Reported 2017-12-01 14:27:28 PST
This is maybe expected, but when I experimented with making the WebContent process run [NSRunLoop run] instead of [NSApplication run], the timer latency increased because the priority of the WebContent process became lower. This increased the layout test flakiness. Ideally, the layout test results should not depend too much on timer latency. Perhaps we should drain the message queue between each test?
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Alexey Proskuryakov
Comment 1 2017-12-02 14:31:31 PST
This sounds like a great way to make flakiness more reproducible! I’m not sure if doing something between the tests is the answer though. We already do many things intended to ensure that there is a strong boundary between tests.
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