This was part of the original design dotnet/coreclr#26456 but I don't think it makes sense, either from a "units" standpoint (speed is not the same as size, and existence of a widely valid conversion ratio is not obvious) or generally.

And I think it may also be complicating attempts to leverage perf score for learning ,eg #92915 (comment)

We have a separate size metric, so in cases where we care about both, we can just look at that as well.