cooperative pool.swift

print("Let's span a bunch of tasks and see how many cooperative threads are created.")

await withTaskGroup(of: Void.self) { group in
    for i in 1...100 {
        group.addTask {
            print("Enter \(i)")
            for n in 1...100000 {
                let a = i * n
                print(a)
            }
            try? await Task.sleep(for: .seconds(2))
            for n in 1...100000 {
                let a = i * n
                print(a)
            }
            print("Exit \(i)")
        }
    }
}

print("Done")