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⚡️ Speed up function replace_function_simple by 251% in PR #1887 (codeflash_python) #1891

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⚡️ Speed up function replace_function_simple by 251% in PR #1887 (codeflash_python) #1891

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6101369
Optimize replace_function_simple
codeflash-ai[bot] Mar 24, 2026
28185c5
fix: remove duplicate _parse_module_cached function definition
github-actions[bot] Mar 24, 2026
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9 changes: 7 additions & 2 deletions codeflash/languages/python/static_analysis/code_replacer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -230,7 +230,7 @@ def replace_functions_in_file(
parsed_function_names.append((class_name, function_name))

# Collect functions from optimized code without using MetadataWrapper
optimized_module = cst.parse_module(optimized_code)
optimized_module = _parse_module_cached(optimized_code)
modified_functions: dict[tuple[str | None, str], cst.FunctionDef] = {}
new_functions: list[cst.FunctionDef] = []
new_class_functions: dict[str, list[cst.FunctionDef]] = defaultdict(list)
Expand Down Expand Up @@ -268,7 +268,7 @@ def replace_functions_in_file(
elif preexisting_objects and (child.name.value, parents) not in preexisting_objects:
new_class_functions[class_name].append(child)

original_module = cst.parse_module(source_code)
original_module = _parse_module_cached(source_code)

max_function_index = None
max_class_index = None
Expand Down Expand Up @@ -387,3 +387,8 @@ def replace_function_definitions_in_module(

def is_zero_diff(original_code: str, new_code: str) -> bool:
return normalize_code(original_code) == normalize_code(new_code)


@lru_cache(maxsize=128)
def _parse_module_cached(source_code: str) -> cst.Module:
return cst.parse_module(source_code)
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