1 files changed, 84 insertions, 0 deletions
diff --git a/Ryujinx.HLE/PerformanceStatistics.cs b/Ryujinx.HLE/PerformanceStatistics.cs
new file mode 100644
index 00000000..bbcdc645
--- /dev/null
+++ b/Ryujinx.HLE/PerformanceStatistics.cs
@@ -0,0 +1,84 @@
+using System.Diagnostics;
+using System.Timers;
+
+namespace Ryujinx.HLE
+{
+    public class PerformanceStatistics
+    {
+        Stopwatch ExecutionTime = new Stopwatch();
+        Timer ResetTimer = new Timer(1000);
+
+        long CurrentGameFrameEnded;
+        long CurrentSystemFrameEnded;
+        long CurrentSystemFrameStart;
+        long LastGameFrameEnded;
+        long LastSystemFrameEnded;
+
+        double AccumulatedGameFrameTime;
+        double AccumulatedSystemFrameTime;
+        double CurrentGameFrameTime;
+        double CurrentSystemFrameTime;
+        double PreviousGameFrameTime;
+        double PreviousSystemFrameTime;
+        public double GameFrameRate   { get; private set; }
+        public double SystemFrameRate { get; private set; }
+        public long SystemFramesRendered;
+        public long GameFramesRendered;
+        public long ElapsedMilliseconds => ExecutionTime.ElapsedMilliseconds;
+        public long ElapsedMicroseconds => (long)
+                (((double)ExecutionTime.ElapsedTicks / Stopwatch.Frequency) * 1000000);
+        public long ElapsedNanoseconds => (long)
+                (((double)ExecutionTime.ElapsedTicks / Stopwatch.Frequency) * 1000000000);
+
+        public PerformanceStatistics()
+        {
+            ExecutionTime.Start();
+            ResetTimer.Elapsed += ResetTimerElapsed;
+            ResetTimer.AutoReset = true;
+            ResetTimer.Start();
+        }
+
+        private void ResetTimerElapsed(object sender, ElapsedEventArgs e)
+        {
+            ResetStatistics();
+        }
+
+        public void StartSystemFrame()
+        {
+            PreviousSystemFrameTime = CurrentSystemFrameTime;
+            LastSystemFrameEnded = CurrentSystemFrameEnded;
+            CurrentSystemFrameStart = ElapsedMicroseconds;
+        }
+
+        public void EndSystemFrame()
+        {
+            CurrentSystemFrameEnded = ElapsedMicroseconds;
+            CurrentSystemFrameTime = CurrentSystemFrameEnded - CurrentSystemFrameStart;
+            AccumulatedSystemFrameTime += CurrentSystemFrameTime;
+            SystemFramesRendered++;
+        }
+
+        public void RecordGameFrameTime()
+        {
+            CurrentGameFrameEnded = ElapsedMicroseconds;
+            CurrentGameFrameTime = CurrentGameFrameEnded - LastGameFrameEnded;
+            PreviousGameFrameTime = CurrentGameFrameTime;
+            LastGameFrameEnded = CurrentGameFrameEnded;
+            AccumulatedGameFrameTime += CurrentGameFrameTime;
+            GameFramesRendered++;
+        }
+
+        public void ResetStatistics()
+        {
+            GameFrameRate = 1000 / ((AccumulatedGameFrameTime / GameFramesRendered) / 1000);
+            GameFrameRate = double.IsNaN(GameFrameRate) ? 0 : GameFrameRate;
+            SystemFrameRate = 1000 / ((AccumulatedSystemFrameTime / SystemFramesRendered) / 1000);
+            SystemFrameRate = double.IsNaN(SystemFrameRate) ? 0 : SystemFrameRate;
+
+            GameFramesRendered = 0;
+            SystemFramesRendered = 0;
+            AccumulatedGameFrameTime = 0;
+            AccumulatedSystemFrameTime = 0;
+        }
+    }
+}