Profiling - `exp/trace`

[vaind]

I've been pinged on an old issue for adding APIs to go runtime that would have enabled us to profile efficiently multiple goroutines - the proposal got some attention and is being considered.
I've responded to some clarification requests.

The most recent response indicates there's a new/experimental alternative approach - using golang.org/x/exp/trace. I'm bringing the information here since I'm not currently actively working on the Go SDK so I don't know what the plans are for profiling.

cc @giortzisg @cleptric

[alkanna]

Sadly it looks like a likely decline as per latest comment

[vaind]

Sadly it looks like a likely decline as per latest comment

That relates to the originally proposed changes, because the way forward (which wasn't available back then) should be exp/trace.