Following the discussion in
https://github.com/w3c/navigation-timing/issues/13
and
https://lists.w3.org/Archives/Public/public-web-perf/2015May/0028.html
I added the following note to domLoading:
[[
The domLoading attribute is deprecated and may be removed in future
versions of this specification. Due to differences in when a Document
object is created in existing user agents, the value returned by the
domLoading is implementation specific and should not be used in
meaningful metrics.
]]
https://w3c.github.io/navigation-timing/#widl-PerformanceNavigationTiming-domLoading
Todd indicated that Microsoft Edge will change its behavior in the
future to return the same value as responseStart.
Feedback is welcome this change causes pain.
Philippe
