ProfilerRecorder

Description

Records the Profiler metric data that a Profiler marker or counter produces.

Use ProfilerRecorder to access performance metrics that the Profiler exposes. You can use it to read Profiler counter data such as memory or render statistics, and Profiler marker timing data in a uniform way.

You can use this API in Editor and Player builds, including Release Players. Use ProfilerRecorderHandle.GetAvailable to get the full list of supported metrics. For a list of built-in Profiler markers available, see the User Manual documentation on Common Profiler markers.

The following example demonstrates how you can use ProfilerRecorder to get memory and timing statistics.

using System.Collections.Generic;
using System.Text;
using Unity.Profiling;
using UnityEngine;

public class ExampleScript : MonoBehaviour
{
    string statsText;
    ProfilerRecorder systemMemoryRecorder;
    ProfilerRecorder gcMemoryRecorder;
    ProfilerRecorder mainThreadTimeRecorder;

    static double GetRecorderFrameAverage(ProfilerRecorder recorder)
    {
        var samplesCount = recorder.Capacity;
        if (samplesCount == 0)
            return 0;

        double r = 0;
        unsafe
        {
            var samples = stackalloc ProfilerRecorderSample[samplesCount];
            recorder.CopyTo(samples, samplesCount);
            for (var i = 0; i < samplesCount; ++i)
                r += samples[i].Value;
            r /= samplesCount;
        }

        return r;
    }

    void OnEnable()
    {
        systemMemoryRecorder = ProfilerRecorder.StartNew(ProfilerCategory.Memory, "System Used Memory");
        gcMemoryRecorder = ProfilerRecorder.StartNew(ProfilerCategory.Memory, "GC Reserved Memory");
        mainThreadTimeRecorder = ProfilerRecorder.StartNew(ProfilerCategory.Internal, "Main Thread", 15);
    }

    void OnDisable()
    {
        systemMemoryRecorder.Dispose();
        gcMemoryRecorder.Dispose();
        mainThreadTimeRecorder.Dispose();
    }

    void Update()
    {
        var sb = new StringBuilder(500);
        sb.AppendLine($"Frame Time: {GetRecorderFrameAverage(mainThreadTimeRecorder) * (1e-6f):F1} ms");
        sb.AppendLine($"GC Memory: {gcMemoryRecorder.LastValue / (1024 * 1024)} MB");
        sb.AppendLine($"System Memory: {systemMemoryRecorder.LastValue / (1024 * 1024)} MB");
        statsText = sb.ToString();
    }

    void OnGUI()
    {
        GUI.TextArea(new Rect(10, 30, 250, 50), statsText);
    }
}

Note:
ProfilerRecorder allocates unmanaged resources and implements IDisposable interface. Use Dispose to free resources when you no longer need to record statistics.

ProfilerRecorder gives you access to Unity metrics in two modes: immediate access to a value of a counter, and the counter value when the frame ends. Additional resources: CurrentValue, LastValue, GetSample, ProfilerRecorderHandle.GetAvailable.

Properties

Constructors

Public Methods

Static Methods