per-id differencing

Author: al2me6

Source/DynamicProperties/MaterialPropertyManager.cs

@@ -107,7 +107,7 @@ private IEnumerator<YieldInstruction> Co_propsLateUpdate()
 			if (props.NeedsEntriesUpdate) {
 				props.OnEntriesChanged(props);
 			} else if (props.NeedsValueUpdate) {
-				props.OnValueChanged(props);
+				props.OnValueChanged(props, null);
 			}
 
 			props.SuppressEagerUpdate =

Source/DynamicProperties/MpbCompiler.cs

@@ -84,9 +84,9 @@ private void RebuildManagerMap()
 		}
 	}
 
-	private void OnPropsValueChanged(Props props)
+	private void OnPropsValueChanged(Props props, int? id)
 	{
-		WriteMpb(props);
+		WriteMpb(props, id);
 		ApplyAll();
 	}
 
@@ -102,15 +102,24 @@ private void OnPropsEntriesChanged(Props props)
 	#region Apply
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
-	private void WriteMpb(Props props)
+	private void WriteMpb(Props props, int? id)
 	{
-		foreach (var id in idManagerMap[props]) props.Write(id, mpb);
+		if (id.HasValue) {
+			props.Write(id.GetValueOrDefault(), mpb);
+		} else {
+			foreach (var managedId in idManagerMap[props]) props.Write(managedId, mpb);
+		}
 	}
 
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	private void RewriteMpb()
 	{
 		mpb.Clear();
-		foreach (var props in idManagerMap.Keys) WriteMpb(props);
+		foreach (var (props, managedIds) in idManagerMap) {
+			foreach (var managedId in managedIds) {
+				props.Write(managedId, mpb);
+			}
+		}
 	}
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]

Source/DynamicProperties/Props.cs

@@ -27,10 +27,12 @@ public sealed class Props(int priority) : IDisposable
 
 	internal IEnumerable<int> ManagedIds => props.Keys;
 
-	internal delegate void PropsUpdateHandler(Props props);
+	internal delegate void ValueChangedHandler(Props props, int? id);
 
-	internal PropsUpdateHandler OnValueChanged = delegate { };
-	internal PropsUpdateHandler OnEntriesChanged = delegate { };
+	internal delegate void EntriesChangedHandler(Props props);
+
+	internal ValueChangedHandler OnValueChanged = delegate { };
+	internal EntriesChangedHandler OnEntriesChanged = delegate { };
 
 	internal bool SuppressEagerUpdate = false;
 	internal bool NeedsValueUpdate = false;
@@ -50,7 +52,7 @@ private void _internalSet<T, TProp>(int id, T value) where TProp : Prop<T>
 				if (!typedProp.UpdateIfChanged(value)) return;
 
 				if (!SuppressEagerUpdate) {
-					OnValueChanged(this);
+					OnValueChanged(this, id);
 				} else {
 					NeedsValueUpdate = true;
 				}