[SR-11805] Revisit Eager Bridging for the Hashed Collections

[CodaFi]

Previous ID	SR-11805
Radar	rdar://problem/57348898
Original Reporter	@CodaFi
Type	Improvement

Additional Detail from JIRA

Votes	0
Component/s	Standard Library
Labels	Improvement, StarterBug
Assignee	None
Priority	Medium

md5: 6107dcaf61168c23a89414ef63c35f48

Issue Description:

We had an active effort a few years ago to look into eager bridging for the hashed collections. That effort has unfortunately fizzled out due to age and neglect, but there are parts of it that may be salvageable in the current iteration of the standard library. An old reference implementation can be found at #5703 but that is now bitrotted. The general approach is still worthwhile, though, and we should try to update it and benchmark it again.

Who knows, there might finally be some real wins.

[CodaFi]

Tagging this as a starter bug, but anybody that takes this up should know it's gonna be a whole lot of code and you may still not win anything for it at the end of the day.

[beccadax]

@swift-ci create

[swift-ci]

Comment by Jacob Mao (JIRA)

I will view the pr