func BenchmarkBarrierNoGoroutine(b *testing.B) {
for i := 0; i < b.N; i++ {
var b Barrier
b.Fall()
<-b.Barrier()
}
}
func BenchmarkBarrier(b *testing.B) {
for i := 0; i < b.N; i++ {
var b Barrier
go b.Fall()
<-b.Barrier()
}
}