diff --git a/BenchmarkTest/BenchmarkTest.csproj b/BenchmarkTest/BenchmarkTest.csproj
new file mode 100644
index 0000000..f569f93
--- /dev/null
+++ b/BenchmarkTest/BenchmarkTest.csproj
@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>net6.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <PackageReference Include="BenchmarkDotNet" Version="0.13.12" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\UndertaleModTool\UndertaleModLib\UndertaleModLib.csproj" />
+    </ItemGroup>
+
+</Project>
diff --git a/BenchmarkTest/DecompileBenchmark.cs b/BenchmarkTest/DecompileBenchmark.cs
new file mode 100644
index 0000000..e83979f
--- /dev/null
+++ b/BenchmarkTest/DecompileBenchmark.cs
@@ -0,0 +1,41 @@
+using BenchmarkDotNet.Attributes;
+using UndertaleModLib;
+using UndertaleModLib.Decompiler;
+using UndertaleModLib.Models;
+
+namespace BenchmarkTest;
+
+[MemoryDiagnoser]
+public class DecompileBenchmark
+{
+    public UndertaleData data;
+    public GlobalDecompileContext decompileContext;
+
+    [GlobalSetup]
+    public void GlobalSetup()
+    {
+        using (FileStream fs = new FileInfo(@"/home/narr/Dokumente/am2r 1.5.5/assets/game.unx_older").OpenRead())
+        {
+            data = UndertaleIO.Read(fs);
+        }
+        decompileContext = new GlobalDecompileContext(data, false);
+    }
+
+    [Benchmark]
+    public void AppendVariableToEveryEntry()
+    {
+        void AppendGML(UndertaleCode code, string appendedText)
+        {
+            var codeText = Decompiler.Decompile(code, decompileContext);
+            codeText = codeText + appendedText + "\n";
+            code.ReplaceGML(codeText, data);
+        }
+
+        foreach (UndertaleCode codeentry in data.Code.SkipLast((int)(data.Code.Count * 0.99)))
+        {
+            if (codeentry.Name.Content == "gml_Object_oRm_a5c11lock_Collision_267") continue;
+
+            AppendGML(codeentry, "var this_variable_is_not_used_and_thus_completely_uselesss = 1; if (!this_variable_is_not_used_and_thus_completely_uselesss) this_variable_is_not_used_and_thus_completely_uselesss = 1");
+        }
+    }
+}
diff --git a/BenchmarkTest/Program.cs b/BenchmarkTest/Program.cs
new file mode 100644
index 0000000..334df3d
--- /dev/null
+++ b/BenchmarkTest/Program.cs
@@ -0,0 +1,7 @@
+// See https://aka.ms/new-console-template for more information
+
+using BenchmarkDotNet.Running;
+using BenchmarkTest;
+
+Console.WriteLine("Hello, World!");
+BenchmarkRunner.Run<DecompileBenchmark>();
diff --git a/YAMS-LIB/patches/DecoupleItemsFromLocations.cs b/YAMS-LIB/patches/DecoupleItemsFromLocations.cs
index 4b8d386..b2ff875 100644
--- a/YAMS-LIB/patches/DecoupleItemsFromLocations.cs
+++ b/YAMS-LIB/patches/DecoupleItemsFromLocations.cs
@@ -38,31 +38,31 @@ public static void Apply(UndertaleData gmData, GlobalDecompileContext decompileC
             gmData.Code.ByName(code).ReplaceGMLInCode("global.item[0]", "global.hasBombs");
         }
 
-        UndertaleGameObject? elderSeptogg = gmData.GameObjects.ByName("oElderSeptogg");
+        const string elderSeptoggName = "oElderSeptogg";
         foreach (var gameObject in new[]
                  {
-                     gmData.Rooms.ByName("rm_a0h11").GameObjects.First(go => go.X == 480 && go.Y == 768 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
-                     gmData.Rooms.ByName("rm_a0h25").GameObjects.First(go => go.X == 120 && go.Y == 816 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
-                     gmData.Rooms.ByName("rm_a0h25").GameObjects.First(go => go.X == 168 && go.Y == 256 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
-                     gmData.Rooms.ByName("rm_a0h29").GameObjects.First(go => go.X == 384 && go.Y == 312 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
-                     gmData.Rooms.ByName("rm_a1h05").GameObjects.First(go => go.X == 1184 && go.Y == 832 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
-                     gmData.Rooms.ByName("rm_a3h04").GameObjects.First(go => go.X == 528 && go.Y == 1344 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
-                     gmData.Rooms.ByName("rm_a3h04").GameObjects.First(go => go.X == 1728 && go.Y == 1248 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
-                     gmData.Rooms.ByName("rm_a3a07").GameObjects.First(go => go.X == 112 && go.Y == 240 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
-                     gmData.Rooms.ByName("rm_a3b02").GameObjects.First(go => go.X == 192 && go.Y == 896 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
-                     gmData.Rooms.ByName("rm_a3b08").GameObjects.First(go => go.X == 224 && go.Y == 352 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
-                     gmData.Rooms.ByName("rm_a0h17").GameObjects.First(go => go.X == 96 && go.Y == 352 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
-                     gmData.Rooms.ByName("rm_a4b02a").GameObjects.First(go => go.X == 120 && go.Y == 816 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
-                     gmData.Rooms.ByName("rm_a4b10").GameObjects.First(go => go.X == 144 && go.Y == 624 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
-                     gmData.Rooms.ByName("rm_a4b10").GameObjects.First(go => go.X == 512 && go.Y == 256 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
-                     gmData.Rooms.ByName("rm_a4b11").GameObjects.First(go => go.X == 224 && go.Y == 2288 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
-                     gmData.Rooms.ByName("rm_a5c13").GameObjects.First(go => go.X == 96 && go.Y == 704 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
-                     gmData.Rooms.ByName("rm_a5c14").GameObjects.First(go => go.X == 1056 && go.Y == 288 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
-                     gmData.Rooms.ByName("rm_a5c17").GameObjects.First(go => go.X == 192 && go.Y == 288 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
-                     gmData.Rooms.ByName("rm_a5c18").GameObjects.First(go => go.X == 128 && go.Y == 192 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
-                     gmData.Rooms.ByName("rm_a5c18").GameObjects.First(go => go.X == 480 && go.Y == 192 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
-                     gmData.Rooms.ByName("rm_a5c21").GameObjects.First(go => go.X == 160 && go.Y == 384 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
-                     gmData.Rooms.ByName("rm_a5c21").GameObjects.First(go => go.X == 96 && go.Y == 560 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content),
+                     gmData.Rooms.ByName("rm_a0h11").GameObjects.First(go => go.X == 480 && go.Y == 768 && go.ObjectDefinition.Name.Content == elderSeptoggName),
+                     gmData.Rooms.ByName("rm_a0h25").GameObjects.First(go => go.X == 120 && go.Y == 816 && go.ObjectDefinition.Name.Content == elderSeptoggName),
+                     gmData.Rooms.ByName("rm_a0h25").GameObjects.First(go => go.X == 168 && go.Y == 256 && go.ObjectDefinition.Name.Content == elderSeptoggName),
+                     gmData.Rooms.ByName("rm_a0h29").GameObjects.First(go => go.X == 384 && go.Y == 312 && go.ObjectDefinition.Name.Content == elderSeptoggName),
+                     gmData.Rooms.ByName("rm_a1h05").GameObjects.First(go => go.X == 1184 && go.Y == 832 && go.ObjectDefinition.Name.Content == elderSeptoggName),
+                     gmData.Rooms.ByName("rm_a3h04").GameObjects.First(go => go.X == 528 && go.Y == 1344 && go.ObjectDefinition.Name.Content == elderSeptoggName),
+                     gmData.Rooms.ByName("rm_a3h04").GameObjects.First(go => go.X == 1728 && go.Y == 1248 && go.ObjectDefinition.Name.Content == elderSeptoggName),
+                     gmData.Rooms.ByName("rm_a3a07").GameObjects.First(go => go.X == 112 && go.Y == 240 && go.ObjectDefinition.Name.Content == elderSeptoggName),
+                     gmData.Rooms.ByName("rm_a3b02").GameObjects.First(go => go.X == 192 && go.Y == 896 && go.ObjectDefinition.Name.Content == elderSeptoggName),
+                     gmData.Rooms.ByName("rm_a3b08").GameObjects.First(go => go.X == 224 && go.Y == 352 && go.ObjectDefinition.Name.Content == elderSeptoggName),
+                     gmData.Rooms.ByName("rm_a0h17").GameObjects.First(go => go.X == 96 && go.Y == 352 && go.ObjectDefinition.Name.Content == elderSeptoggName),
+                     gmData.Rooms.ByName("rm_a4b02a").GameObjects.First(go => go.X == 120 && go.Y == 816 && go.ObjectDefinition.Name.Content == elderSeptoggName),
+                     gmData.Rooms.ByName("rm_a4b10").GameObjects.First(go => go.X == 144 && go.Y == 624 && go.ObjectDefinition.Name.Content == elderSeptoggName),
+                     gmData.Rooms.ByName("rm_a4b10").GameObjects.First(go => go.X == 512 && go.Y == 256 && go.ObjectDefinition.Name.Content == elderSeptoggName),
+                     gmData.Rooms.ByName("rm_a4b11").GameObjects.First(go => go.X == 224 && go.Y == 2288 && go.ObjectDefinition.Name.Content == elderSeptoggName),
+                     gmData.Rooms.ByName("rm_a5c13").GameObjects.First(go => go.X == 96 && go.Y == 704 && go.ObjectDefinition.Name.Content == elderSeptoggName),
+                     gmData.Rooms.ByName("rm_a5c14").GameObjects.First(go => go.X == 1056 && go.Y == 288 && go.ObjectDefinition.Name.Content == elderSeptoggName),
+                     gmData.Rooms.ByName("rm_a5c17").GameObjects.First(go => go.X == 192 && go.Y == 288 && go.ObjectDefinition.Name.Content == elderSeptoggName),
+                     gmData.Rooms.ByName("rm_a5c18").GameObjects.First(go => go.X == 128 && go.Y == 192 && go.ObjectDefinition.Name.Content == elderSeptoggName),
+                     gmData.Rooms.ByName("rm_a5c18").GameObjects.First(go => go.X == 480 && go.Y == 192 && go.ObjectDefinition.Name.Content == elderSeptoggName),
+                     gmData.Rooms.ByName("rm_a5c21").GameObjects.First(go => go.X == 160 && go.Y == 384 && go.ObjectDefinition.Name.Content == elderSeptoggName),
+                     gmData.Rooms.ByName("rm_a5c21").GameObjects.First(go => go.X == 96 && go.Y == 560 && go.ObjectDefinition.Name.Content == elderSeptoggName),
                  })
         {
             gameObject.CreationCode.ReplaceGMLInCode("global.item[0]", "global.hasBombs");
@@ -77,7 +77,7 @@ public static void Apply(UndertaleData gmData, GlobalDecompileContext decompileC
         subscreenMenuStep.ReplaceGMLInCode("global.item[2] == 0", "!global.hasSpiderball");
         foreach (UndertaleCode code in gmData.Code.Where(c =>
                      (c.Name.Content.StartsWith("gml_Script_scr_septoggs_") && c.Name.Content.Contains('2')) ||
-                    c.Name.Content ==  gmData.Rooms.ByName("rm_a0h25").GameObjects.First(go => go.X == 120 && go.Y == 816 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content).CreationCode.Name.Content)
+                    c.Name.Content ==  gmData.Rooms.ByName("rm_a0h25").GameObjects.First(go => go.X == 120 && go.Y == 816 && go.ObjectDefinition.Name.Content == elderSeptoggName).CreationCode.Name.Content)
                  )
         {
             code.ReplaceGMLInCode("global.item[2]", "global.hasSpiderball");
@@ -95,7 +95,7 @@ public static void Apply(UndertaleData gmData, GlobalDecompileContext decompileC
         foreach (UndertaleCode? code in gmData.Code.Where(c =>
                      (c.Name.Content.StartsWith("gml_Script_scr_septoggs_") && c.Name.Content.Contains('4')) ||
                      c.Name.Content == "gml_Room_rm_a3b08_Create" ||
-                     c == gmData.Rooms.ByName("rm_a5c17").GameObjects.First(go => go.X == 192 && go.Y == 288 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content).CreationCode)
+                     c == gmData.Rooms.ByName("rm_a5c17").GameObjects.First(go => go.X == 192 && go.Y == 288 && go.ObjectDefinition.Name.Content == elderSeptoggName).CreationCode)
                  )
         {
             code.ReplaceGMLInCode("global.item[4]", "global.hasHijump");
@@ -120,7 +120,7 @@ public static void Apply(UndertaleData gmData, GlobalDecompileContext decompileC
         foreach (UndertaleCode? code in gmData.Code.Where(c =>
                      (c.Name.Content.StartsWith("gml_Script_scr_septoggs_") && c.Name.Content.Contains('6')) ||
                      gmData.Rooms.ByName("rm_a5a03").GameObjects.Where(go => go.X is >= 96 and <= 112 && go.Y is >= 240 and <= 288 && go.ObjectDefinition.Name.Content == "oBlockStep").Select(go => go.CreationCode).Contains(c) ||
-                     c == gmData.Rooms.ByName("rm_a0h25").GameObjects.First(go => go.X == 120 && go.Y == 816 && go.ObjectDefinition.Name.Content == elderSeptogg.Name.Content).CreationCode)
+                     c == gmData.Rooms.ByName("rm_a0h25").GameObjects.First(go => go.X == 120 && go.Y == 816 && go.ObjectDefinition.Name.Content == elderSeptoggName).CreationCode)
                  )
         {
             code.ReplaceGMLInCode("global.item[6]", "global.hasSpacejump");
diff --git a/diff.txt b/diff.txt
new file mode 100644
index 0000000..1a17044
--- /dev/null
+++ b/diff.txt
@@ -0,0 +1,40 @@
+diff --git a/UndertaleModLib/Compiler/Compiler.cs b/UndertaleModLib/Compiler/Compiler.cs
+index 3fa2ae6b..72e3d7c9 100644
+--- a/UndertaleModLib/Compiler/Compiler.cs
++++ b/UndertaleModLib/Compiler/Compiler.cs
+@@ -142,8 +142,11 @@ namespace UndertaleModLib.Compiler
+                 for (int i = 0; i < list.Count; i++)
+                 {
+                     string name = list[i].Name?.Content;
+-                    if (name != null)
+-                        assetIds[name] = i;
++                    if (name is not null)
++                    {
++                        assetIds.Add(name, i);
++                    }
++                    //assetIds[name] = i;
+                 }
+             }
+         }
+@@ -154,6 +157,8 @@ namespace UndertaleModLib.Compiler
+         public delegate void MainThreadFunc();
+         public delegate void MainThreadDelegate(MainThreadFunc f);
+ 
++        private static Dictionary<UndertaleData, CompileContext> codeToContextMapping = new Dictionary<UndertaleData, CompileContext>();
++
+         // A simple matching convenience
+         public static bool In<T>(this T obj, params T[] args)
+         {
+@@ -169,7 +174,11 @@ namespace UndertaleModLib.Compiler
+ 
+         public static CompileContext CompileGMLText(string input, UndertaleData data, UndertaleCode code)
+         {
+-            return CompileGMLText(input, new CompileContext(data, code));
++            bool isInMapping = codeToContextMapping.TryGetValue(data, out CompileContext ctx);
++            var returnedContext = CompileGMLText(input, ctx ?? new CompileContext(data, code));
++            if (!isInMapping)
++                codeToContextMapping.Add(data, returnedContext);
++            return returnedContext;
+         }
+ 
+         public static CompileContext CompileGMLText(string input, CompileContext context, bool redoAssets = false)