c <- make([]byte, 1)
	}

	for i := 0; i < b.N; i++ {
		<-c // get token
		go func() {
			useStackPtrs(1000, false) // uses ~1MB max
			m := make([]byte, 8192)   // make GC trigger occasionally
			c <- m                    // return token
		}()
	}
}

func useStackPtrs(n int, b bool) {
	if b {
		// This code contributes to the stack frame size, and hence to the