InstanceSpawner.cs

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

namespace Benchmark.Test
{
    class InstanceSpawner : MonoBehaviour
    {
        Transform cachedtransform;

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

        IEnumerator RunTests()
        {
            for (int i = 0; i < 5; i++)
            {
                RunTest();
                yield return new WaitForSeconds(2);
            }
        }

        void RunTest()
        {
            Vector3 local = new Vector3(0, 0, 0);
            this.cachedtransform = this.GetComponent<Transform>();

            float sum = 0f;
            var stopwatch = Stopwatch.StartNew();
            
            for (int i = 0; i < 10000000; i++)
            {
                // 1. base case
                sum += local.z;

                // 2. transform cached in member var
                // sum += cachedtransform.position.z;

                // 3. transform getter from MonoBehaviour
                // sum += transform.position.z;

                // 4. transform getter from GameObject
                // sum += gameObject.transform.position.z;

                // 5. untyped GetComponent from MonoBehaviour
                // sum += (GetComponent(typeof(Transform)) as Transform).position.z;

                // 6. untyped GetComponent from GameObject
                // sum += (gameObject.GetComponent(typeof(Transform)) as Transform).position.z;

                // 7. typesafe GetComponent from MonoBehaviour
                // sum += GetComponent<Transform>().position.z;

                // 8. typesafe GetComponent from GameObject
                // sum += gameObject.GetComponent<Transform>().position.z;

                // 9. string GetComponent from MonoBehaviour
                // sum += (GetComponent("Transform") as Transform).position.z;

                // 10. string GetComponent from GameObject
                // sum += (gameObject.GetComponent("Transform") as Transform).position.z;
            }

            stopwatch.Stop();
            UnityEngine.Debug.Log("SECONDS ELAPSED: " + stopwatch.Elapsed.TotalSeconds);
        }

    }
}