Improve MauiFactory performance by avoiding reflection to get base classes

src/Core/src/Hosting/Internal/MauiFactory.cs

@@ -3,6 +3,8 @@
 using System.Collections;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
 using Microsoft.Extensions.DependencyInjection;
 
 namespace Microsoft.Maui.Hosting.Internal
@@ -11,6 +13,7 @@ class MauiFactory : IMauiFactory
 	{
 		static readonly Type EnumerableType = typeof(IEnumerable<>);
 		static readonly Type ListType = typeof(List<>);
+		static readonly ConcurrentDictionary<Type, IReadOnlyList<Type>> ServiceBaseTypes = new();
 
 		readonly IMauiServiceCollection _collection;
 
@@ -98,23 +101,22 @@ protected bool TryGetServiceDescriptors(ref Type serviceType, out ServiceDescrip
 			return false;
 		}
 
-		static List<Type> GetServiceBaseTypes(Type serviceType)
+		static IReadOnlyList<Type> GetServiceBaseTypes(Type serviceType) =>
+			ServiceBaseTypes.GetOrAdd(serviceType, ServiceBaseTypesFactory);
+
+		static IReadOnlyList<Type> ServiceBaseTypesFactory(Type type)
 		{
-			var types = new List<Type> { serviceType };
+			var types = new List<Type> { type };
 
-			Type? baseType = serviceType.BaseType;
+			Type? baseType = type.BaseType;
 
 			while (baseType != null)
 			{
 				types.Add(baseType);
 				baseType = baseType.BaseType;
 			}
 
-			foreach (var interfac in serviceType.GetInterfaces())
-			{
-				if (typeof(IView).IsAssignableFrom(interfac))
-					types.Add(interfac);
-			}
+			types.AddRange(type.GetInterfaces().Where(typeof(IView).IsAssignableFrom));
 
 			return types;
 		}

src/TestUtils/src/Microsoft.Maui.IntegrationTests/Utilities/BuildWarningsUtilities.cs

@@ -380,6 +380,14 @@ public static void AssertWarnings(this List<WarningsPerFile> actualWarnings, Lis
 							"Microsoft.Maui.Hosting.Internal.MauiFactory.GetServiceBaseTypes(Type): 'this' argument does not satisfy 'DynamicallyAccessedMemberTypes.Interfaces' in call to 'System.Type.GetInterfaces()'. The parameter '#0' of method 'Microsoft.Maui.Hosting.Internal.MauiFactory.GetServiceBaseTypes(Type)' does not have matching annotations. The source value must declare at least the same requirements as those declared on the target location it is assigned to.",
 						}
 					},
+					new WarningsPerCode
+					{
+						Code = "IL2070",
+						Messages = new List<string>
+						{
+							"Microsoft.Maui.Hosting.Internal.MauiFactory.ServiceBaseTypesFactory(Type): 'this' argument does not satisfy 'DynamicallyAccessedMemberTypes.Interfaces' in call to 'System.Type.GetInterfaces()'. The parameter '#0' of method 'Microsoft.Maui.Hosting.Internal.MauiFactory.ServiceBaseTypesFactory(Type)' does not have matching annotations. The source value must declare at least the same requirements as those declared on the target location it is assigned to.",
+						}
+					},
 				}
 			},
 			new WarningsPerFile