[webkit-dev] PSA: higher precision event timestamp landing soon - port verification needed

Benjamin Poulain benjamin at webkit.org
Mon Jun 10 14:19:16 PDT 2013

On Mon, Jun 10, 2013 at 7:37 AM, Rick Byers <rbyers at chromium.org> wrote:

> There's been discussion / patches in the past for exposing system time as
> a separate timestamp on the Event object (as IE does).  See
> https://lists.webkit.org/pipermail/webkit-dev/2012-October/022574.html,
> https://bugs.webkit.org/show_bug.cgi?id=94987 and
> http://lists.w3.org/Archives/Public/public-web-perf/2012Oct/0046.html.
> In particular, the use of UNIX-epoch timestamps means such measurements
> will never be completely accurate (due to NTP skew, leap seconds, etc.).
>  But just updating the timestamp everyone uses to be more accurate (even if
> not perfect) seems like a clear win.
> Do you think both approaches should be pursued, or is updating the
> existing timestamp to be as accurate as possible within the epoch semantics
> good enough?

Kind of different goals in one timestamp. :)

For input events, the accurate time delta covers many use cases. High
precision time would be nice but it is not really a must have.
For other kind of events, a high precision timestamp like you suggest could
make sense.

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