diff --git a/codeflash/languages/javascript/support.py b/codeflash/languages/javascript/support.py
index f1a570740..1d41b3ae8 100644
--- a/codeflash/languages/javascript/support.py
+++ b/codeflash/languages/javascript/support.py
@@ -9,11 +9,13 @@
 import logging
 import subprocess
 import xml.etree.ElementTree as ET
+from functools import lru_cache
 from pathlib import Path
 from typing import TYPE_CHECKING, Any
 
 from codeflash.discovery.functions_to_optimize import FunctionToOptimize
 from codeflash.languages.base import CodeContext, FunctionFilterCriteria, HelperFunction, Language, TestInfo, TestResult
+from codeflash.languages.javascript.normalizer import normalize_js_code
 from codeflash.languages.javascript.treesitter import TreeSitterAnalyzer, TreeSitterLanguage, get_analyzer_for_file
 from codeflash.languages.registry import register_language
 from codeflash.models.models import FunctionParent
@@ -26,6 +28,8 @@
     from codeflash.models.models import GeneratedTestsList, InvocationId, ValidCode
     from codeflash.verification.verification_utils import TestConfig
 
+_cached_normalize_js_code = lru_cache(maxsize=128)(normalize_js_code)
+
 logger = logging.getLogger(__name__)
 
 
@@ -1704,11 +1708,9 @@ def validate_syntax(self, source: str) -> bool:
 
     def normalize_code(self, source: str) -> str:
         """Normalize JavaScript code for deduplication using tree-sitter."""
-        from codeflash.languages.javascript.normalizer import normalize_js_code
-
         try:
             is_ts = self.treesitter_language == TreeSitterLanguage.TYPESCRIPT
-            return normalize_js_code(source, typescript=is_ts)
+            return _cached_normalize_js_code(source, typescript=is_ts)
         except Exception:
             return source