1499694 - Support console.profile/profileEnd with the new performance panel

Status: NEW

(DevTools :: Performance Tools (Profiler/Timeline), enhancement, P3)

Description

[Julien Wajsberg [:julienw]]

Currently we don't support console.profile and console.profileEnd in the new performance panel, but we'll need to support these functions before enabling it by default.

Comment 1

[Greg Tatum [:gregtatum]]

For what it's worth, this is a non-standard API, so I'm not particularly concerned about shipping the new performance panel without it. Safari uses it, but Chrome doesn't appear to actually record a profile with it. Chrome doesn't throw an error.

https://developer.mozilla.org/en-US/docs/Web/API/Console/profile

Comment 2

[Julien Wajsberg [:julienw]]

I'm more concerned because this would be a loss of functionality.
Now it would be nice to get some numbers about the usage of these methods.

Comment 3

[:Harald Kirschner :digitarald]

Telemetry has USE_COUNTER2_CONSOLE_PROFILE* metrics. Numbers are super low (4 out of 30mil samples had some console.profile usage on DevEdition 62).

Comment 4

[:Harald Kirschner :digitarald]

Chrome was also willing to remove timeline/timelineEnd in the past: https://github.com/whatwg/console/issues/27#issuecomment-288596811

Comment 5

[Julien Wajsberg [:julienw]]

See also https://github.com/whatwg/console/issues/144