inspector/css/selector-dynamic-specificity.html is very slow on OS X Yosemite WebKit2, even in release build. http://webkit-test-results.appspot.com/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=inspector%2Fcss%2Fselector-dynamic-specificity.html I'm going to add a Slow expectation, however it seems quite surprising that we have a big difference between Mavericks and Yosemite. Maybe that's a sign of a real bug somewhere.
<rdar://problem/19716028>
Added the expectation in r179607.
Even with the expectation, the test frequently times out in debug builds. Here are some recent run times, in seconds: 150, 150, 150, 17, 82, 22, 150, 118, 24, 19, 18, 22, 134, 97, 150, 95, 27, 150, 150, 150, 53, 47, 150, 127, 102, 19, 95, 150, 19, 62, 133 150 seconds is slow test timeout.
Performance on Yosemite is still unreliable, but not anywhere that poor any more. This test usually takes around 2 seconds, but sometimes exceeds 20 seconds.