Function benchmarkWorkers

exercise-3/solution/worker_test.go:13–24

(i int, b *testing.B)

func Benchmark20Workers(b *testing.B) { benchmarkWorkers(20, b) }

func benchmarkWorkers(i int, b *testing.B) {
	for n := 0; n < b.N; n++ {
		workerPool := &workerPool{
			wg:         new(sync.WaitGroup),
			msgs:       make(chan string),
			numWorkers: i,
			mu:         new(sync.Mutex),
		}
		go workerPool.queueMessages()
		_ = workerPool.run()
	}
}