Intent to Ship: Performance.timeOrigin

[n...@chromium.org]

Contact emails

n...@chromium.org igri...@chromium.org  

Spec

https://w3c.github.io/hr-time/#time-origin-timestamp

https://w3c.github.io/hr-time/#the-performance-interface

Summary

Implement the timeOrigin attribute of the Performance interface.

Link to “Intent to Implement” blink-dev discussion

https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/ck9M6Ev21lo

Is this feature supported on all six Blink platforms (Windows, Mac, Linux, Chrome OS, Android, and Android WebView)?

Yes.

Debuggability

Use ‘performance.timeOrigin’ in console wherever ‘performance’ is defined.

Interoperability and Compatibility Risk

The spec specifies that this attribute can expose some additional clock drift resolution but nothing significantly more than what was previously known: https://w3c.github.io/hr-time/#clock-drift

Edge: Supported in preview

Firefox: Supported

Safari: No

Web developers: Positive

Is this feature fully tested by web-platform-tests?

https://github.com/w3c/web-platform-tests/blob/master/hr-time/timeOrigin.html

OWP launch tracking bug

747989

Entry on the feature dashboard

https://www.chromestatus.com/feature/5695487386583040

[Philip Jägenstedt]

LGTM1

Thanks for putting the tests in wpt! Introducing our new web-platform-tests dashboard (by Jeff Carpenter), http://wpt.fyi/hr-time/timeOrigin.html currently shows this:

In other words, the tests are already passing in Firefox. If it's already in a pre-release version of Edge, perhaps that's reason to invest in adding that to the dashboard as well...

​

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[Rick Byers]

LGTM2

On Wed, Aug 16, 2017 at 9:14 AM, Philip Jägenstedt <foo...@chromium.org> wrote:

LGTM1

Thanks for putting the tests in wpt! Introducing our new web-platform-tests dashboard (by Jeff Carpenter), http://wpt.fyi/hr-time/timeOrigin.html currently shows this:

In other words, the tests are already passing in Firefox. If it's already in a pre-release version of Edge, perhaps that's reason to invest in adding that to the dashboard as well...

I think we agreed with Edge folks that if anyone was going to go through the hassle of maintaining a machine with current Windows Insider OS releases on it for the WPT dashboard, it should be Microsoft folks not us :-).  

 

To view this discussion on the web visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAARdPYeTnr3fnJoJShYKAU9hTHsrujHEWPH8qc7F23ZVA5Q6xw%40mail.gmail.com.

[Dimitri Glazkov]

LGTM3

To view this discussion on the web visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAFUtAY8TaWvkZUypgmO4an30H8_4PZrYXWXpRqqM0ZhKdJ0Ugg%40mail.gmail.com.