A huge number of objects spawn, what should I do?

Question

Unity

The code:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Spawn : MonoBehaviour
{
    public GameObject Smile;

    private void Start()
    {
      StartCoroutine(SummonSmile());
    }
    IEnumerator SummonSmile()
    {
      while (true)
      {
        SpawnSmile();
        yield return new WaitForSeconds(1);
      }
  }

  private void SpawnSmile()
  {
    Instantiate(Smile, new Vector2(Random.Range(-2, 2), 6f), Quaternion.identity);
  }	
}

The problem itself:
A huge number of objects spawn every millisecond, and it turns out -pc
I would attach a screenshot but I can’t because pc RIP

Answer 1

private void Start()
    {
      InvokeRepeating("SpawnSmile", 0f, 1f);
    }

Answer 2

while (true)
      {
        SpawnSmile();
        yield return new WaitForSeconds(1);
      }

endless cycle

Answer 3

So that a lot of objects do not spawn, then you can make sure that if there are more objects created than necessary, then they stop being created.