Unity FPS logging

FpsMono.cs

using UnityEngine;

public class FpsMono : MonoBehaviour
{
    private float[] _deltaTimes = new float [600];
    private int _deltaTimeIndex = 0;
        
    // Update is called once per frame
    void Update()
    {
        _deltaTimes[_deltaTimeIndex] = Time.deltaTime;
        _deltaTimeIndex = (_deltaTimeIndex + 1) % _deltaTimes.Length;

        if (_deltaTimeIndex == 0)
        {
            logFps();
        }
    }

    void logFps()
    {
        int samplingSeconds = 1;
        GetFps(samplingSeconds, out int totalFrames, out float averageTime, out float maxTime);
        Debug.Log( $"samplingSeconds: {samplingSeconds}, fps: {totalFrames}, avg: {averageTime * 1000}ms, max: {maxTime * 1000}ms");
    }

    void GetFps(int samplingSeconds, out int totalFrames, out float averageTime, out float maxTime)
    {
        float accumulatedTime = 0;
        int frames = samplingSeconds * 60;
        maxTime = 0;
        totalFrames = 0;
        
        for (int i = 0; i < frames; i++)
        {
            int index = _deltaTimeIndex - i - 1;
            if (index < 0)
                index += _deltaTimes.Length;
            float time = _deltaTimes[index];

            if (accumulatedTime < samplingSeconds)
                totalFrames++;

            if (time > maxTime)
                maxTime = time;

            accumulatedTime += time;
        }

        averageTime = accumulatedTime / frames;
    }
}