Redblacktree benchmark useless code?

func BenchmarkRedBlackTreePut1000(b *testing.B) {
	b.StopTimer()
	size := 1000
	tree := New[int, struct{}]()
        // useless?
	//for n := 0; n < size; n++ {
	//	tree.Put(n, struct{}{})
	//}
	b.StartTimer()
	benchmarkPut(b, tree, size)
}

func benchmarkPut(b *testing.B, tree *Tree[int, struct{}], size int) {
	for i := 0; i < b.N; i++ {
		for n := 0; n < size; n++ {
                     // Put will replace same keys, 
                     // so it's equivalent to Get after inserting first size n.(without rebalancing)
		     //tree.Put(n, struct{}{})
                     // replace it to
  		     tree.Put(rand.Int(), struct{}{})
		}
	}
}