diff --git a/Editor/Obfuscator.cs b/Editor/Obfuscator.cs
index ca5656b..253c141 100644
--- a/Editor/Obfuscator.cs
+++ b/Editor/Obfuscator.cs
@@ -40,7 +40,7 @@ namespace Obfuz
             _assemblyCache = new AssemblyCache(new PathAssemblyResolver(options.AssemblySearchDirs.ToArray()));
             _obfuscateRuleConfig = new ObfuscateRuleConfig();
             _obfuscateRuleConfig.LoadXmls(options.ObfuscationRuleFiles);
-            _renamePolicy = new CombineRenamePolicy(new SystemRenamePolicy(), new UnityRenamePolicy(), _obfuscateRuleConfig);
+            _renamePolicy = new CacheRenamePolicy(new CombineRenamePolicy(new SystemRenamePolicy(), new UnityRenamePolicy(), _obfuscateRuleConfig));
             //_nameMaker = new TestNameMaker();
             _nameMaker = NameMakerFactory.CreateNameMakerBaseASCIICharSet();
 
diff --git a/Editor/Rename/CacheRenamePolicy.cs b/Editor/Rename/CacheRenamePolicy.cs
new file mode 100644
index 0000000..a54ce2b
--- /dev/null
+++ b/Editor/Rename/CacheRenamePolicy.cs
@@ -0,0 +1,88 @@
+using dnlib.DotNet;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Obfuz.Rename
+{
+    public class CacheRenamePolicy : RenamePolicyBase
+    {
+        private readonly IRenamePolicy _underlyingPolicy;
+
+        private readonly Dictionary<object, bool> _computeCache = new Dictionary<object, bool>();
+
+        public CacheRenamePolicy(IRenamePolicy underlyingPolicy)
+        {
+            _underlyingPolicy = underlyingPolicy;
+        }
+
+        public override bool NeedRename(ModuleDefMD mod)
+        {
+            if (!_computeCache.TryGetValue(mod, out var value))
+            {
+                value = _underlyingPolicy.NeedRename(mod);
+                _computeCache.Add(mod, value);
+            }
+            return value;
+        }
+
+        public override bool NeedRename(TypeDef typeDef)
+        {
+            if (!_computeCache.TryGetValue(typeDef, out var value))
+            {
+                value = _underlyingPolicy.NeedRename(typeDef);
+                _computeCache[typeDef] = value;
+            }
+            return value;
+        }
+
+        public override bool NeedRename(MethodDef methodDef)
+        {
+            if (!_computeCache.TryGetValue(methodDef, out var value))
+            {
+                value = _underlyingPolicy.NeedRename(methodDef);
+                _computeCache[methodDef] = value;
+            }
+            return value;
+        }
+
+        public override bool NeedRename(FieldDef fieldDef)
+        {
+            if (!_computeCache.TryGetValue(fieldDef, out var value))
+            {
+                value = _underlyingPolicy.NeedRename(fieldDef);
+                _computeCache[fieldDef] = value;
+            }
+            return value;
+        }
+
+        public override bool NeedRename(PropertyDef propertyDef)
+        {
+            if (!_computeCache.TryGetValue(propertyDef, out var value))
+            {
+                value = _underlyingPolicy.NeedRename(propertyDef);
+                _computeCache[propertyDef] = value;
+            }
+            return value;
+        }
+
+        public override bool NeedRename(EventDef eventDef)
+        {
+            if (!_computeCache.TryGetValue(eventDef, out var value))
+            {
+                value = _underlyingPolicy.NeedRename(eventDef);
+                _computeCache[eventDef] = value;
+            }
+            return value;
+        }
+
+        public override bool NeedRename(ParamDef paramDef)
+        {
+            if (!_computeCache.TryGetValue(paramDef, out var value))
+            {
+                value = _underlyingPolicy.NeedRename(paramDef);
+                _computeCache[paramDef] = value;
+            }
+            return value;
+        }
+    }
+}
diff --git a/Editor/Rename/CombineRenamePolicy.cs b/Editor/Rename/CombineRenamePolicy.cs
index ddbde8d..2151e29 100644
--- a/Editor/Rename/CombineRenamePolicy.cs
+++ b/Editor/Rename/CombineRenamePolicy.cs
@@ -6,6 +6,7 @@ namespace Obfuz.Rename
     public class CombineRenamePolicy : IRenamePolicy
     {
         private readonly IRenamePolicy[] _policies;
+
         public CombineRenamePolicy(params IRenamePolicy[] policies)
         {
             _policies = policies;