diff --git a/codeflash/api/aiservice.py b/codeflash/api/aiservice.py
index 7480252bd..067c95da4 100644
--- a/codeflash/api/aiservice.py
+++ b/codeflash/api/aiservice.py
@@ -5,6 +5,7 @@
 import os
 import platform
 import time
+from functools import lru_cache
 from typing import TYPE_CHECKING, Any, cast
 
 import requests
@@ -96,7 +97,7 @@ def _get_valid_candidates(
     ) -> list[OptimizedCandidate]:
         candidates: list[OptimizedCandidate] = []
         for opt in optimizations_json:
-            code = CodeStringsMarkdown.parse_markdown_code(opt["source_code"])
+            code = self._cached_parse_markdown_code(opt["source_code"])
             if not code.code_strings:
                 continue
             candidates.append(
@@ -828,6 +829,11 @@ def generate_workflow_steps(
             logger.debug("[aiservice.py:generate_workflow_steps] Could not parse error response")
         return None
 
+    @staticmethod
+    @lru_cache(maxsize=4096)
+    def _cached_parse_markdown_code(source_code: str) -> CodeStringsMarkdown:
+        return CodeStringsMarkdown.parse_markdown_code(source_code)
+
 
 class LocalAiServiceClient(AiServiceClient):
     """Client for interacting with the local AI service."""