perf: Refactor inherited DPs retrieval for less memory during app sta…

…rtup

src/Uno.UI/UI/Xaml/DependencyObjectStore.cs

@@ -1631,7 +1631,7 @@ private void PropagateInheritedProperties(DependencyObjectStore? childStore = nu
 			}
 
 			// Raise the property change for the current values
-			var props = DependencyProperty.GetFrameworkPropertiesForType(_originalObjectType, FrameworkPropertyMetadataOptions.Inherits);
+			var props = DependencyProperty.GetInheritedPropertiesForType(_originalObjectType);
 
 			// Not using the ActualInstance property here because we need to get a WeakReference instead.
 			var instanceRef = _originalObjectRef != null ? _originalObjectRef : ThisWeakReference;

src/Uno.UI/UI/Xaml/DependencyProperty.Dictionary.FrameworkPropertiesForType.cs

@@ -1,19 +1,17 @@
 #nullable enable
 
 using System;
+using System.Collections;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
+using System.Runtime.CompilerServices;
 using System.Text;
+using System.Threading;
 using Microsoft.UI.Xaml;
-using Uno.Extensions;
-using System.Diagnostics;
-using System.Runtime.CompilerServices;
 using Uno;
-using System.Threading;
 using Uno.Collections;
-
-using _Key = Uno.CachedTuple<System.Type, Microsoft.UI.Xaml.FrameworkPropertyMetadataOptions>;
-using System.Collections;
+using Uno.Extensions;
 
 namespace Microsoft.UI.Xaml
 {
@@ -25,7 +23,7 @@ private class FrameworkPropertiesForTypeDictionary
 			// So we don't use pooling to not cause pool exhaustion by renting without returning.
 			private readonly HashtableEx _entries = new HashtableEx(usePooling: false);
 
-			internal bool TryGetValue(_Key key, out DependencyProperty[]? result)
+			internal bool TryGetValue(Type key, out DependencyProperty[]? result)
 			{
 				if (_entries.TryGetValue(key, out var value))
 				{
@@ -38,7 +36,7 @@ internal bool TryGetValue(_Key key, out DependencyProperty[]? result)
 				return false;
 			}
 
-			internal void Add(_Key key, DependencyProperty[] value)
+			internal void Add(Type key, DependencyProperty[] value)
 				=> _entries.Add(key, value);
 
 			internal void Clear() => _entries.Clear();

src/Uno.UI/UI/Xaml/DependencyProperty.Dictionary.PropertiesRegistry.cs

@@ -52,13 +52,17 @@ internal void Add(Type type, string name, DependencyProperty property)
 				typeTable!.Add(name, property);
 			}
 
-			internal void AppendPropertiesForType(Type type, List<DependencyProperty> properties)
+			internal void AppendInheritedPropertiesForType(Type type, List<DependencyProperty> properties)
 			{
 				if (TryGetTypeTable(type, out var typeTable))
 				{
 					foreach (var value in typeTable!.Values)
 					{
-						properties.Add((DependencyProperty)value);
+						var dp = (DependencyProperty)value;
+						if (dp.IsInherited)
+						{
+							properties.Add(dp);
+						}
 					}
 				}
 			}

src/Uno.UI/UI/Xaml/DependencyProperty.cs

@@ -38,7 +38,6 @@ public sealed partial class DependencyProperty
 	{
 		private readonly static DependencyPropertyRegistry _registry = new DependencyPropertyRegistry();
 
-		private readonly static TypeToPropertiesDictionary _getPropertiesForType = new TypeToPropertiesDictionary();
 		private readonly static NameToPropertyDictionary _getPropertyCache = new NameToPropertyDictionary();
 		private static object DefaultThemeAnimationDurationBox = new Duration(FeatureConfiguration.ThemeAnimation.DefaultThemeAnimationDuration);
 
@@ -48,7 +47,7 @@ public sealed partial class DependencyProperty
 		private readonly static PropertyCacheEntry _searchPropertyCacheEntry = new();
 
 
-		private readonly static FrameworkPropertiesForTypeDictionary _getFrameworkPropertiesForType = new FrameworkPropertiesForTypeDictionary();
+		private readonly static FrameworkPropertiesForTypeDictionary _getInheritedPropertiesForType = new FrameworkPropertiesForTypeDictionary();
 
 		private readonly PropertyMetadata _ownerTypeMetadata; // For perf consideration, we keep direct ref the metadata for the owner type
 
@@ -380,37 +379,19 @@ private static DependencyProperty InternalGetProperty(Type type, string name)
 			return null;
 		}
 
-		/// <summary>
-		/// Gets the dependencies properties for the specified type
-		/// </summary>
-		/// <param name="type">A dependency object</param>
-		/// <returns>An array of Dependency Properties.</returns>
-		internal static DependencyProperty[] GetPropertiesForType(Type type)
-		{
-			DependencyProperty[] result = null;
-
-			if (!_getPropertiesForType.TryGetValue(type, out result))
-			{
-				_getPropertiesForType.Add(type, result = InternalGetPropertiesForType(type));
-			}
-
-			return result;
-		}
-
 		/// <summary>
 		/// Gets the dependencies properties for the specified type with specific Framework metadata options
 		/// </summary>
 		/// <param name="type">A dependency object</param>
 		/// <param name="options">A set of flags that must be set</param>
 		/// <returns>An array of Dependency Properties.</returns>
-		internal static DependencyProperty[] GetFrameworkPropertiesForType(Type type, FrameworkPropertyMetadataOptions options)
+		internal static DependencyProperty[] GetInheritedPropertiesForType(Type type)
 		{
 			DependencyProperty[] result = null;
-			var key = CachedTuple.Create(type, options);
 
-			if (!_getFrameworkPropertiesForType.TryGetValue(key, out result))
+			if (!_getInheritedPropertiesForType.TryGetValue(type, out result))
 			{
-				_getFrameworkPropertiesForType.Add(key, result = InternalGetFrameworkPropertiesForType(type, options));
+				_getInheritedPropertiesForType.Add(type, result = InternalGetInheritedPropertiesForType(type));
 			}
 
 			return result;
@@ -422,9 +403,8 @@ internal static DependencyProperty[] GetFrameworkPropertiesForType(Type type, Fr
 		internal static void ClearRegistry()
 		{
 			_registry.Clear();
-			_getPropertiesForType.Clear();
 			_getPropertyCache.Clear();
-			_getFrameworkPropertiesForType.Clear();
+			_getInheritedPropertiesForType.Clear();
 		}
 
 		private static void RegisterProperty(Type ownerType, string name, DependencyProperty newProperty)
@@ -434,29 +414,6 @@ private static void RegisterProperty(Type ownerType, string name, DependencyProp
 			_registry.Add(ownerType, name, newProperty);
 		}
 
-		private static DependencyProperty[] InternalGetPropertiesForType(Type type)
-		{
-			ForceInitializeTypeConstructor(type);
-
-			var results = new List<DependencyProperty>();
-
-			do
-			{
-				_registry.AppendPropertiesForType(type, results);
-
-				// Dependency properties are inherited
-				type = type.BaseType;
-			}
-			while (type != typeof(object) && type != null);
-
-			var array = results.ToArray();
-
-			// Produce a pre-sorted list, aligned with the initial behavior of DependencyPropertyDetailsCollection
-			Array.Sort(array, (l, r) => l.UniqueId - r.UniqueId);
-
-			return array;
-		}
-
 		/// <summary>
 		/// Forces the invocation of the cctor of a type and its base types that may contain DependencyProperty registrations.
 		/// </summary>
@@ -480,21 +437,27 @@ private static void ForceInitializeTypeConstructor(Type type)
 			while (type != null);
 		}
 
-		private static DependencyProperty[] InternalGetFrameworkPropertiesForType(Type type, FrameworkPropertyMetadataOptions options)
+		private static DependencyProperty[] InternalGetInheritedPropertiesForType(Type type)
 		{
-			var output = new List<DependencyProperty>();
+			ForceInitializeTypeConstructor(type);
+
+			var results = new List<DependencyProperty>();
 
-			foreach (var prop in GetPropertiesForType(type))
+			do
 			{
-				var propertyOptions = (prop.Metadata as FrameworkPropertyMetadata)?.Options;
+				_registry.AppendInheritedPropertiesForType(type, results);
 
-				if (propertyOptions != null && (propertyOptions & options) != 0)
-				{
-					output.Add(prop);
-				}
+				// Dependency properties are inherited
+				type = type.BaseType;
 			}
+			while (type != typeof(object) && type != null);
 
-			return output.ToArray();
+			var array = results.ToArray();
+
+			// Produce a pre-sorted list, aligned with the initial behavior of DependencyPropertyDetailsCollection
+			Array.Sort(array, (l, r) => l.UniqueId - r.UniqueId);
+
+			return array;
 		}
 
 		private bool TryGetDefaultInheritedPropertyValue(out object defaultValue)