InstanceSpawner.cs

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

namespace Benchmark.Test
{
    class InstanceSpawner : MonoBehaviour
    {
        int numComponents = 5;
        int numObjects = 0;
        List<GameObject> _objects = new List<GameObject>();

        public void Start()
        {
            StartCoroutine(SpawnInstances());
        }

        IEnumerator SpawnInstances()
        {
            yield return new WaitForSeconds(1);

            numObjects = 5000;
            yield return new WaitForSeconds(3);
            PrintStatus();

            numObjects = 10000;
            yield return new WaitForSeconds(3);
            PrintStatus();

            numObjects = 15000;
            yield return new WaitForSeconds(3);
            PrintStatus();

            numObjects = 20000;
            yield return new WaitForSeconds(3);
            PrintStatus();

            UnityEngine.Debug.Log("DONE");
        }

        void Update()
        {
            while (_objects.Count < numObjects) { SpawnObject(); }
        }

        void SpawnObject()
        {
            GameObject obj = new GameObject();
            for (int i = 0; i < numComponents; i++)
            {
                obj.AddComponent<DummyComponent>();
            }
            _objects.Add(obj);
        }

        void PrintStatus()
        {
            UnityEngine.Debug.Log("ENTITIES: " + _objects.Count + "  COMPONENTS: " + numComponents + "  FPS: " + HUDFPS.lastFps);
        }
    }
    
    class DummyComponent : MonoBehaviour
    {
        long updates;

        void Start()
        {
            this.updates = 0;
        }

        void Update()
        {
            this.updates++;
        }
    }

}