Add FrameRateProfilerRecorder

Assets/Hatbor/Scripts/LifetimeScope/MainLifetimeScope.cs

@@ -25,6 +25,7 @@ protected override void Configure(IContainerBuilder builder)
 
             // PerformanceProfiler
             builder.RegisterEntryPoint<PerformanceProfilerTicker>();
+            builder.Register<IProfilerRecorder, FrameRateProfilerRecorder>(Lifetime.Singleton).AsSelf();
             builder.Register<IProfilerRecorder, VmcServerProfilerRecorder>(Lifetime.Singleton).AsSelf();
 
             // Rig/VMC

Assets/Hatbor/Scripts/PerformanceProfiler/FrameRateProfilerRecorder.cs

@@ -0,0 +1,24 @@
+using UniRx;
+
+namespace Hatbor.PerformanceProfiler
+{
+    public sealed class FrameRateProfilerRecorder : IProfilerRecorder
+    {
+        readonly ReactiveProperty<string> text = new();
+        IReadOnlyReactiveProperty<string> IProfilerRecorder.Text => text;
+
+        int count;
+        float time;
+
+        void IProfilerRecorder.Tick(float t)
+        {
+            count++;
+            time += t;
+            if (!(time >= 1f)) return;
+            var frameRate = count / time;
+            text.Value = $"Frame Rate: {frameRate:F2}/s";
+            time = 0f;
+            count = 0;
+        }
+    }
+}