diff --git a/sources/ClangSharp.PInvokeGenerator/PInvokeGenerator.Predicates.cs b/sources/ClangSharp.PInvokeGenerator/PInvokeGenerator.Predicates.cs
index 7270c301..a73796ef 100644
--- a/sources/ClangSharp.PInvokeGenerator/PInvokeGenerator.Predicates.cs
+++ b/sources/ClangSharp.PInvokeGenerator/PInvokeGenerator.Predicates.cs
@@ -310,8 +310,17 @@ bool IsIncludedFileOrLocation(Cursor cursor, CXFile file, CXSourceLocation locat
             // Use case insensitive comparison on Windows
             var equalityComparer = RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ? StringComparer.OrdinalIgnoreCase : StringComparer.Ordinal;
 
-            // Normalize paths to be '/' for comparison
-            var fileName = file.Name.ToString().NormalizePath();
+            // Normalize paths to be '/' for comparison. The same file recurs for
+            // every cursor it contains, so cache the normalized names per file to
+            // avoid re-allocating them (and re-running Path.GetFullPath) each call.
+            if (!_fileNames.TryGetValue(file, out var names))
+            {
+                var name = file.Name.ToString().NormalizePath();
+                names = (name, name.NormalizeFullPath());
+                _fileNames.Add(file, names);
+            }
+
+            var fileName = names.Name;
 
             if (_visitedFiles.Add(fileName) && _config.LogVisitedFiles)
             {
@@ -322,7 +331,7 @@ bool IsIncludedFileOrLocation(Cursor cursor, CXFile file, CXSourceLocation locat
             {
                 return true;
             }
-            else if (_config.TraversalNames.Contains(fileName.NormalizeFullPath(), equalityComparer))
+            else if (_config.TraversalNames.Contains(names.FullName, equalityComparer))
             {
                 return true;
             }
diff --git a/sources/ClangSharp.PInvokeGenerator/PInvokeGenerator.cs b/sources/ClangSharp.PInvokeGenerator/PInvokeGenerator.cs
index 87bc0e58..08bdcb7d 100644
--- a/sources/ClangSharp.PInvokeGenerator/PInvokeGenerator.cs
+++ b/sources/ClangSharp.PInvokeGenerator/PInvokeGenerator.cs
@@ -63,6 +63,7 @@ public sealed partial class PInvokeGenerator : IDisposable
     private readonly Dictionary<string, HashSet<string>> _topLevelClassUsings;
     private readonly Dictionary<string, List<string>> _topLevelClassAttributes;
     private readonly Dictionary<CXFile, (nuint Address, nuint Length)> _fileContents;
+    private readonly Dictionary<CXFile, (string Name, string FullName)> _fileNames;
     private readonly HashSet<string> _topLevelClassNames;
     private readonly HashSet<string> _usedRemappings;
     private readonly string _placeholderMacroType;
@@ -161,6 +162,7 @@ public PInvokeGenerator(PInvokeGeneratorConfiguration config, Func<string, Strea
             _topLevelClassNames = new HashSet<string>(StringComparer.Ordinal);
             _topLevelClassAttributes = new Dictionary<string, List<string>>(StringComparer.Ordinal);
             _fileContents = [];
+            _fileNames = [];
             _topLevelClassUsings = new Dictionary<string, HashSet<string>>(StringComparer.Ordinal);
             _usedRemappings = new HashSet<string>(StringComparer.Ordinal);
             _filePath = "";
@@ -1680,6 +1682,7 @@ public void GenerateBindings(TranslationUnit translationUnit, string filePath, s
         _overloadIndices.Clear();
         _isExcluded.Clear();
         _fileContents.Clear();
+        _fileNames.Clear();
 
         if (translationUnit.Handle.NumDiagnostics != 0)
         {