[Webkit-unassigned] [Bug 188620] Navigation Timing API reporting below 0 for response time (responseEnd - responseStart)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=188620

--- Comment #3 from msartintarm at gmail.com ---
I have determined that it is iPads with the latest versions of iOS which are throwing this error.

I found this out by analyzing our metrics and segmenting them per user agent. 

Around 50% (!) of reports from iPads using iOS 10.0 and 11.0 are throwing this error. This is across millions of daily hits.. basically each browser session on iPad has a 50% chance of reporting responseStart / responseEnd numbers which are invalid.

I do not see any other iOS device throwing errors at a rate of above 0.5%.

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