diff --git a/isometric-park-fna/FNAGame.cs b/isometric-park-fna/FNAGame.cs
--- a/isometric-park-fna/FNAGame.cs
+++ b/isometric-park-fna/FNAGame.cs
@@ -63,6 +63,7 @@
     TimeSpan updateTime = TimeSpan.Zero;
 
     Queue<float> past_fps = new Queue<float>(100);
+    Queue<TimeSpan> past_draw = new Queue<TimeSpan>(100);
     int tilesDrawn = 0;
 
     private static int width = 1280;
@@ -866,10 +867,12 @@
 
         #region debug_window
         //Calcs for debug window:
+        past_draw.Enqueue(this.drawTime);
         if ((this.frameCounter % 15) == 0)
         {
             past_fps.Enqueue(this.frameRate);
 
+
             /*
                if (this.frameRate > 60.0)
                {
@@ -937,6 +940,24 @@
         additionalInfo.Add("Dialog entries", entries);
         additionalInfo.Add("Metadata entries", descriptions);
 
+        if (past_fps.Count() > 5) {
+            additionalInfo.Add(".01%% fps", MathUtils.Percentile(past_fps.Skip(5).ToArray(), 0.0001f).ToString());
+            additionalInfo.Add(".1%% fps", MathUtils.Percentile(past_fps.Skip(5).ToArray(), 0.001f).ToString());
+            additionalInfo.Add("1%% fps", MathUtils.Percentile(past_fps.Skip(5).ToArray(), 0.01f).ToString());
+            additionalInfo.Add("50%% fps", MathUtils.Percentile(past_fps.Skip(5).ToArray(), 0.50f).ToString());
+        }
+
+        if (past_draw.Count() > 5) {
+            var past_draw_floats = past_draw.Skip(5).Select(ts => ts.TotalMilliseconds).ToArray();
+            additionalInfo.Add(".01%% draw", MathUtils.Percentile(past_draw_floats, 0.0001f).ToString());
+            additionalInfo.Add(".1%% draw", MathUtils.Percentile(past_draw_floats, 0.001f).ToString());
+            additionalInfo.Add("1%% draw", MathUtils.Percentile(past_draw_floats, 0.01f).ToString());
+            additionalInfo.Add("50%% draw", MathUtils.Percentile(past_draw_floats, 0.50f).ToString());
+            additionalInfo.Add("99%% draw", MathUtils.Percentile(past_draw_floats, 0.99f).ToString());
+            additionalInfo.Add("99.9%% draw", MathUtils.Percentile(past_draw_floats, 0.999f).ToString());
+            additionalInfo.Add("99.99%% draw", MathUtils.Percentile(past_draw_floats, 0.9999f).ToString());
+        }
+
         debugWindow.Layout(debugInfo, additionalInfo, ref show_another_window);
 
         _imGuiRenderer.AfterLayout();
diff --git a/isometric-park-fna/Utils/MathUtils.cs b/isometric-park-fna/Utils/MathUtils.cs
--- a/isometric-park-fna/Utils/MathUtils.cs
+++ b/isometric-park-fna/Utils/MathUtils.cs
@@ -1,6 +1,15 @@
 using System;
+using JM.LinqFaster;
 namespace isometricparkfna
 {
+	public class EmptyArrayException : Exception {
+		public EmptyArrayException() {
+		}
+
+		public EmptyArrayException(string message) : base(message) {
+		}
+
+	}
     public class MathUtils
     {
         public MathUtils()
@@ -126,5 +135,39 @@
 
             return integers[index];
         }
+
+	public static float Percentile(float[] floats, float percentile) {
+		if (floats.Length > 0) {
+			Array.Sort(floats);
+			var raw_position = (floats.Length-1) * percentile;
+
+			var lower_position = (int)raw_position;
+			var higher_position = Math.Min((int)(raw_position+1), floats.Length-1);
+
+			var remainder = (raw_position % 1);
+
+			return (floats[lower_position] * (1-remainder)) + (floats[higher_position] * remainder);
+		}
+		else {
+			throw new EmptyArrayException("Array must not be empty");
+		}
+	}
+
+	public static double Percentile(double[] doubles, double percentile) {
+		if (doubles.Length > 0) {
+			Array.Sort(doubles);
+			var raw_position = (doubles.Length-1) * percentile;
+
+			var lower_position = (int)raw_position;
+			var higher_position = Math.Min((int)raw_position + 1, doubles.Length -1);
+
+			var remainder = (raw_position % 1);
+
+			return (doubles[lower_position] * (1-remainder)) + (doubles[higher_position] * remainder);
+		}
+		else {
+			throw new EmptyArrayException("Array must not be empty");
+		}
+	}
     }
 }