diff --git a/OpenRA.Game/Game.cs b/OpenRA.Game/Game.cs
index bff7eb4511..3f5c8ddfa3 100644
--- a/OpenRA.Game/Game.cs
+++ b/OpenRA.Game/Game.cs
@@ -602,7 +602,10 @@ namespace OpenRA
 
 			if (orderManager.LastTickTime.ShouldAdvance(tick))
 			{
-				using (new PerfSample("tick_time"))
+				if (orderManager.GameStarted && orderManager.LocalFrameNumber == 0)
+					PerfHistory.Reset(); // Remove history that occurred whilst the new game was loading.
+
+				using (var sample = new PerfSample("tick_time"))
 				{
 					orderManager.LastTickTime.AdvanceTickTime(tick);
 
@@ -611,7 +614,11 @@ namespace OpenRA
 					Sync.RunUnsynced(world, orderManager.TickImmediate);
 
 					if (world == null)
+					{
+						if (orderManager.GameStarted)
+							PerfHistory.Reset(); // Remove old history when a new game starts.
 						return;
+					}
 
 					if (orderManager.TryTick())
 					{
diff --git a/OpenRA.Game/Support/PerfHistory.cs b/OpenRA.Game/Support/PerfHistory.cs
index 0d6a774e69..13731a8105 100644
--- a/OpenRA.Game/Support/PerfHistory.cs
+++ b/OpenRA.Game/Support/PerfHistory.cs
@@ -47,5 +47,11 @@ namespace OpenRA.Support
 				if (item.HasNormalTick)
 					item.Tick();
 		}
+
+		public static void Reset()
+		{
+			foreach (var item in Items.Values)
+				item.ResetSamples();
+		}
 	}
 }
diff --git a/OpenRA.Game/Support/PerfItem.cs b/OpenRA.Game/Support/PerfItem.cs
index 4fb933ed57..c88a7d055c 100644
--- a/OpenRA.Game/Support/PerfItem.cs
+++ b/OpenRA.Game/Support/PerfItem.cs
@@ -72,5 +72,12 @@ namespace OpenRA.Support
 				return samples[n];
 			}
 		}
+
+		public void ResetSamples()
+		{
+			head = 1;
+			tail = 0;
+			Val = 0.0;
+		}
 	}
 }