Task.sleep() sleep too long on Windows

[HeMet]

Description

No response

Reproduction

@main
public struct App {
    public static func main() async throws {
        let clock = ContinuousClock.continuous
        let dur = try await clock.measure {
            try await Task.sleep(for: .seconds(0.1))
        }
        print("Slept for: \(dur)")
    }
}

Output:

Slept for: 64.1733749 seconds

Expected behavior

Task sleep for 0.1 second.

Environment

Swift version 5.10-dev (LLVM 7c3b53ecaad54fb, Swift ebaa8c6)
Target: x86_64-unknown-windows-msvc

Additional information

No response

[AnthonyLatsis]

cc @compnerd

[compnerd]

This is interesting.

>swiftc -emit-executable reduced.swift -o reduced.exe -parse-as-library
>.\reduced
Slept for: 4.2784966 seconds

This is definitely over-sleeping even though we would expect some over-sleeping due to windows scheduling.