CustomSamplerTest.cs

using UnityEngine;
using UnityEngine.Profiling;

public class CustomSamplerTest:MonoBehaviour
{
  CustomSampler _sampler;
  
  void Start ()
  {
    // 事前にCustomSamplerを生成しておく必要あり
    _sampler = CustomSampler.Create("Hoge");
  }
  
  void Update ()
  {
    _sampler.Begin();
    // 計測したい処理
    _sampler.End();
  }
}