Re: [webrtc-stats] End-to-end delay metrics (#537)

Note that NTP times are subject to clock slew and adjustments by NTP, and subject to error due to NTP mis configurations or peering issues

The spec for performance.now()  (https://developer.mozilla.org/en-US/docs/Web/API/DOMHighResTimeStamp) says not to reply Date.now() or NTP for timing durations of things as it can report negative deltas. The same seems it would be true of anything in webRTC relying on NTP. Ideally this would use a single monotonically increasing clock and have the ability to report a round trip time that allows for placing an upper bounds on the delay.

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Received on Friday, 21 August 2020 01:23:02 UTC