Function parallel

profile/profile_test.go:1895–1905

parallel runs n copies of fn in parallel.

(n int, fn func())

// parallel runs n copies of fn in parallel.
func parallel(n int, fn func()) {
	var wg sync.WaitGroup
	wg.Add(n)
	for i := 0; i < n; i++ {
		go func() {
			fn()
			wg.Done()
		}()
	}
	wg.Wait()
}

func TestThreadSafety(t *testing.T) {
	src := testProfile1.Copy()