From 2006a9ea769b62d6f38d57a54a086ba422f9a8c5 Mon Sep 17 00:00:00 2001
From: sinaioutlander <49360850+sinaioutlander@users.noreply.github.com>
Date: Mon, 21 Sep 2020 22:45:33 +1000
Subject: [PATCH] Faster non-generic Il2Cpp casting

---
 src/Helpers/ReflectionHelpers.cs | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/Helpers/ReflectionHelpers.cs b/src/Helpers/ReflectionHelpers.cs
index 1b9d122..403ed0c 100644
--- a/src/Helpers/ReflectionHelpers.cs
+++ b/src/Helpers/ReflectionHelpers.cs
@@ -22,15 +22,19 @@ namespace Explorer
         public static ILType ComponentType => Il2CppType.Of<Component>();
         public static ILType BehaviourType => Il2CppType.Of<Behaviour>();
 
-        private static readonly MethodInfo m_tryCastMethodInfo = typeof(Il2CppObjectBase).GetMethod("TryCast");
+        private static readonly MethodInfo tryCastMethodInfo = typeof(Il2CppObjectBase).GetMethod("TryCast");
+        private static readonly Dictionary<Type, MethodInfo> cachedTryCastMethods = new Dictionary<Type, MethodInfo>();
 
         public static object Il2CppCast(object obj, Type castTo)
         {
             if (!typeof(Il2CppSystem.Object).IsAssignableFrom(castTo)) return obj;
 
-            return m_tryCastMethodInfo
-                    .MakeGenericMethod(castTo)
-                    .Invoke(obj, null);
+            if (!cachedTryCastMethods.ContainsKey(castTo))
+            {
+                cachedTryCastMethods.Add(castTo, tryCastMethodInfo.MakeGenericMethod(castTo));
+            }
+
+            return cachedTryCastMethods[castTo].Invoke(obj, null);
         }
 
         public static bool IsEnumerable(Type t)