Improve performance

Author: stevapple

Sources/Foundation/FileManager+Win32.swift

@@ -709,9 +709,10 @@ extension FileManager {
     }
 
     internal func _isExecutableFile(atPath path: String) -> Bool {
-        var isDirectory: ObjCBool = false
-        guard fileExists(atPath: path, isDirectory: &isDirectory) else { return false }
-        guard !isDirectory.boolValue, _isReadableFile(atPath: path) else { return false }
+        guard let faAttributes: WIN32_FILE_ATTRIBUTE_DATA = try? windowsFileAttributes(atPath: path),
+              faAttributes.dwFileAttributes & DWORD(FILE_ATTRIBUTE_DIRECTORY) != DWORD(FILE_ATTRIBUTE_DIRECTORY) else {
+            return false
+        }
         return path.withCString(encodedAs: UTF16.self) {
             var binaryType = DWORD(0)
             return GetBinaryTypeW($0, &binaryType)