Swift 5.7 regression in async call performance

[stephencelis]

I noticed this too in a flakey test that relied on Task.yield(). It went from failing < 1% of the time to failing > 50% of the time.

Reliably testing code that adopts Swift Concurrency?

Not resurrecting this thread to suggest relying on Task.yield() is a good idea (though I imagine folks will rely on it till there are better tools to assist testing async code), but I did notice that this behavior has gotten much worse in the Xcode 14 betas. Previously, the single Task.yield() would result in a passing test 99% of the time, but now if fails far more often than not. I need to do a "mega" yield for it to consistently pass on my machine: await Task.detached(priority: .low) { await…