Re: [w3ctag/design-reviews] JS Self-Profiling API (#366)

> Absolutely. We don't anticipate this providing more timing information than SharedArrayBuffer/performance.now() (see slides here regarding a polyfill), but UA-specific mitigations may be necessary, as with any timing source.

How about timing the renderer/etc areas? It's not quite the same concern as with SharedArrayBuffer / performance.now().

> The intended use case is for live users in the wild, to get representative traces. Permissions aren't a great fit for this use case, particularly because that biases sampling (limiting the ability to collect profiles from the first load, as well as selecting for users with a higher propensity to accept permissions).



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