RESOLVED DUPLICATE of bug 179982 180733
Specific CSS styles thrashing the CPU 
https://bugs.webkit.org/show_bug.cgi?id=180733
Summary Specific CSS styles thrashing the CPU
Sean Curtis
Reported 2017-12-12 18:52:38 PST
Reduced test case here: https://codepen.io/seancurtis/pen/ypLwwq Changing the calc to calc(100vh - 20px) solves it, as does removing things like the transition or position. Might be revealing something more critical though. Does not happen on 10.x. Still happens on tech preview (11.1 at the time of raising this).
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Simon Fraser (smfr)
Comment 1 2017-12-13 09:55:59 PST
Antti, didn't you fix something like this recently?
Simon Fraser (smfr)
Comment 2 2017-12-13 09:57:52 PST
I was thinking of bug 179982.
Antti Koivisto
Comment 3 2017-12-14 01:58:30 PST
Yes, this looks like 179982. *** This bug has been marked as a duplicate of bug 179982 ***
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