⚡️ Speed up function `function_kind` by 39% in PR #309 (`updated-vsc-extension`) by codeflash-ai[bot] · Pull Request #330 · codeflash-ai/codeflash

codeflash-ai · 2025-06-16T21:29:58Z

⚡️ This pull request contains optimizations for PR #309

If you approve this dependent PR, these changes will be merged into the original PR branch updated-vsc-extension.

This PR will be automatically closed if the original PR is merged.

📄 39% (0.39x) speedup for `function_kind` in `codeflash/code_utils/static_analysis.py`

⏱️ Runtime : 1.77 milliseconds → 1.27 milliseconds (best of 158 runs)

📝 Explanation and details

Here's an optimized version of your program.
Main changes.

Replace slices and length-based for-loops with more direct, idiomatic Python control flow (they did nothing).
Combine checks for better early returns.
Reduce unnecessary list accesses.
Process decorator list without unnecessary nesting.
No changes to function signatures or output.
All your in-code comments are preserved (there were none).

Key improvements:

Direct mapping of parents[0].type; no useless range-loop.
Early exit for empty parents.
Avoid redundant list traversal.
Set literal for type checking.

This function has the same return signature and logic, but runs faster and is easier to reason about.

✅ Correctness verification report:

Test	Status
⚙️ Existing Unit Tests	✅ 7 Passed
🌀 Generated Regression Tests	✅ 2848 Passed
⏪ Replay Tests	🔘 None Found
🔎 Concolic Coverage Tests	🔘 None Found
📊 Tests Coverage	100.0%

⚙️ Existing Unit Tests Details

- test_static_analysis.py

🌀 Generated Regression Tests Details

from __future__ import annotations

import ast
from enum import Enum
from typing import List

# imports
import pytest  # used for our unit tests
from codeflash.code_utils.static_analysis import function_kind


# --- Minimal stubs for FunctionKind and FunctionParent for testing ---
class FunctionKind(Enum):
    FUNCTION = "function"
    CLASS_METHOD = "class_method"
    STATIC_METHOD = "static_method"
    INSTANCE_METHOD = "instance_method"

class FunctionParent:
    def __init__(self, type_: str):
        self.type = type_
from codeflash.code_utils.static_analysis import function_kind

# --- Helper functions for tests ---

def make_funcdef(
    name="f",
    decorator_list=None,
    async_=False
):
    """Helper to create ast.FunctionDef or ast.AsyncFunctionDef nodes."""
    if decorator_list is None:
        decorator_list = []
    args = ast.arguments(posonlyargs=[], args=[], kwonlyargs=[], kw_defaults=[], defaults=[])
    if async_:
        return ast.AsyncFunctionDef(
            name=name, args=args, body=[], decorator_list=decorator_list, returns=None, type_comment=None
        )
    else:
        return ast.FunctionDef(
            name=name, args=args, body=[], decorator_list=decorator_list, returns=None, type_comment=None
        )

# --- Unit tests ---

# 1. Basic Test Cases

def test_top_level_function():
    """Test a top-level (module-level) function."""
    node = make_funcdef()
    parents = []
    codeflash_output = function_kind(node, parents) # 802ns -> 752ns

def test_top_level_async_function():
    """Test a top-level async function."""
    node = make_funcdef(async_=True)
    parents = []
    codeflash_output = function_kind(node, parents) # 741ns -> 711ns

def test_function_inside_function():
    """Test a function defined inside another function."""
    node = make_funcdef()
    parents = [FunctionParent("FunctionDef")]
    codeflash_output = function_kind(node, parents) # 942ns -> 911ns

def test_function_inside_async_function():
    """Test a function defined inside an async function."""
    node = make_funcdef()
    parents = [FunctionParent("AsyncFunctionDef")]
    codeflash_output = function_kind(node, parents) # 912ns -> 842ns

def test_instance_method():
    """Test a method inside a class with no decorators (should be instance method)."""
    node = make_funcdef()
    parents = [FunctionParent("ClassDef")]
    codeflash_output = function_kind(node, parents) # 2.39μs -> 1.27μs

def test_class_method():
    """Test a method inside a class with @classmethod decorator."""
    node = make_funcdef(decorator_list=[ast.Name(id="classmethod")])
    parents = [FunctionParent("ClassDef")]
    codeflash_output = function_kind(node, parents) # 2.45μs -> 1.36μs

def test_static_method():
    """Test a method inside a class with @staticmethod decorator."""
    node = make_funcdef(decorator_list=[ast.Name(id="staticmethod")])
    parents = [FunctionParent("ClassDef")]
    codeflash_output = function_kind(node, parents) # 2.67μs -> 1.27μs

def test_method_with_other_decorator():
    """Test a method inside a class with unrelated decorator (should be instance method)."""
    node = make_funcdef(decorator_list=[ast.Name(id="property")])
    parents = [FunctionParent("ClassDef")]
    codeflash_output = function_kind(node, parents) # 2.43μs -> 1.44μs

# 2. Edge Test Cases

def test_no_parents_list():
    """Test with parents=None (should treat as top-level function)."""
    node = make_funcdef()
    parents = []
    codeflash_output = function_kind(node, parents) # 731ns -> 651ns

def test_empty_decorator_list():
    """Test with empty decorator list inside class (should be instance method)."""
    node = make_funcdef(decorator_list=[])
    parents = [FunctionParent("ClassDef")]
    codeflash_output = function_kind(node, parents) # 2.31μs -> 1.23μs

def test_multiple_decorators_classmethod_first():
    """Test method with multiple decorators, classmethod first."""
    node = make_funcdef(decorator_list=[ast.Name(id="classmethod"), ast.Name(id="something_else")])
    parents = [FunctionParent("ClassDef")]
    codeflash_output = function_kind(node, parents) # 2.46μs -> 1.26μs

def test_multiple_decorators_staticmethod_second():
    """Test method with multiple decorators, staticmethod second."""
    node = make_funcdef(decorator_list=[ast.Name(id="other"), ast.Name(id="staticmethod")])
    parents = [FunctionParent("ClassDef")]
    # Should return STATIC_METHOD as soon as it finds it
    codeflash_output = function_kind(node, parents) # 2.71μs -> 1.44μs

def test_decorator_as_attribute():
    """Test method with decorator as ast.Attribute (should not match)."""
    node = make_funcdef(decorator_list=[ast.Attribute(value=ast.Name(id="abc"), attr="classmethod")])
    parents = [FunctionParent("ClassDef")]
    # Only ast.Name is checked, so should be instance method
    codeflash_output = function_kind(node, parents) # 2.42μs -> 1.28μs

def test_unknown_parent_type():
    """Test with unknown parent type (should return None)."""
    node = make_funcdef()
    parents = [FunctionParent("Module")]
    codeflash_output = function_kind(node, parents) # 1.74μs -> 541ns

def test_nested_class_method():
    """Test method inside class inside function (should still detect as instance method)."""
    node = make_funcdef()
    parents = [FunctionParent("ClassDef"), FunctionParent("FunctionDef")]
    codeflash_output = function_kind(node, parents) # 2.23μs -> 1.18μs

def test_nested_function_in_class():
    """Test function inside function inside class (should be function, not method)."""
    node = make_funcdef()
    parents = [FunctionParent("FunctionDef"), FunctionParent("ClassDef")]
    codeflash_output = function_kind(node, parents) # 852ns -> 891ns

def test_async_method_in_class():
    """Test async method inside class (should be instance method)."""
    node = make_funcdef(async_=True)
    parents = [FunctionParent("ClassDef")]
    codeflash_output = function_kind(node, parents) # 2.30μs -> 1.18μs

def test_decorator_name_case_sensitive():
    """Test that decorator name is case sensitive."""
    node = make_funcdef(decorator_list=[ast.Name(id="ClassMethod")])
    parents = [FunctionParent("ClassDef")]
    # 'ClassMethod' is not 'classmethod'
    codeflash_output = function_kind(node, parents) # 2.46μs -> 1.45μs

def test_multiple_classdef_parents():
    """Test with multiple ClassDef parents (should still detect as instance method)."""
    node = make_funcdef()
    parents = [FunctionParent("ClassDef"), FunctionParent("ClassDef")]
    codeflash_output = function_kind(node, parents) # 2.26μs -> 1.16μs


def test_many_parents_all_functions():
    """Test with a large number of function parents (should still be function)."""
    node = make_funcdef()
    parents = [FunctionParent("FunctionDef") for _ in range(500)]
    codeflash_output = function_kind(node, parents) # 1.18μs -> 1.24μs

def test_many_parents_classdef_first():
    """Test with many parents, first is ClassDef (should be instance method)."""
    node = make_funcdef()
    parents = [FunctionParent("ClassDef")] + [FunctionParent("FunctionDef") for _ in range(999)]
    codeflash_output = function_kind(node, parents) # 17.7μs -> 1.66μs

def test_large_number_of_decorators_staticmethod_last():
    """Test with a large decorator list, staticmethod at the end."""
    decorators = [ast.Name(id=f"decor{i}") for i in range(998)] + [ast.Name(id="staticmethod")]
    node = make_funcdef(decorator_list=decorators)
    parents = [FunctionParent("ClassDef")]
    codeflash_output = function_kind(node, parents) # 95.7μs -> 82.2μs

def test_large_number_of_decorators_no_match():
    """Test with a large decorator list, none matching."""
    decorators = [ast.Name(id=f"decor{i}") for i in range(1000)]
    node = make_funcdef(decorator_list=decorators)
    parents = [FunctionParent("ClassDef")]
    codeflash_output = function_kind(node, parents) # 96.5μs -> 83.0μs

def test_large_nested_parents_mixed():
    """Test with 500 ClassDef parents followed by 499 FunctionDef parents."""
    node = make_funcdef()
    parents = [FunctionParent("ClassDef") for _ in range(500)] + [FunctionParent("FunctionDef") for _ in range(499)]
    codeflash_output = function_kind(node, parents) # 17.5μs -> 1.50μs

def test_large_scale_async_staticmethod():
    """Test async static method with large decorator list."""
    decorators = [ast.Name(id=f"decor{i}") for i in range(500)] + [ast.Name(id="staticmethod")]
    node = make_funcdef(decorator_list=decorators, async_=True)
    parents = [FunctionParent("ClassDef")]
    codeflash_output = function_kind(node, parents) # 49.8μs -> 42.7μs
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.

from __future__ import annotations

import ast
from dataclasses import dataclass
from enum import Enum

# imports
import pytest  # used for our unit tests
from codeflash.code_utils.static_analysis import function_kind


# Simulate the FunctionKind enum (as not provided)
class FunctionKind(Enum):
    FUNCTION = "function"
    CLASS_METHOD = "class_method"
    STATIC_METHOD = "static_method"
    INSTANCE_METHOD = "instance_method"

# Simulate the FunctionParent dataclass (as not provided)
@dataclass
class FunctionParent:
    type: str  # e.g., "Module", "ClassDef", "FunctionDef", etc.
from codeflash.code_utils.static_analysis import function_kind


# Helper functions for tests
def make_funcdef(name, decorators=None, async_=False):
    """Helper to create ast.FunctionDef or ast.AsyncFunctionDef with given decorators."""
    if decorators is None:
        decorators = []
    if async_:
        return ast.AsyncFunctionDef(
            name=name,
            args=ast.arguments(posonlyargs=[], args=[], kwonlyargs=[], kw_defaults=[], defaults=[]),
            body=[],
            decorator_list=decorators,
            returns=None,
            type_comment=None
        )
    else:
        return ast.FunctionDef(
            name=name,
            args=ast.arguments(posonlyargs=[], args=[], kwonlyargs=[], kw_defaults=[], defaults=[]),
            body=[],
            decorator_list=decorators,
            returns=None,
            type_comment=None
        )

def make_decorator(name):
    """Helper to create ast.Name decorator."""
    return ast.Name(id=name, ctx=ast.Load())

# unit tests

# 1. Basic Test Cases

def test_module_level_function():
    # Function defined at module level (no parents)
    node = make_funcdef("foo")
    parents = []
    codeflash_output = function_kind(node, parents); result = codeflash_output # 752ns -> 691ns

def test_module_level_async_function():
    # Async function at module level
    node = make_funcdef("bar", async_=True)
    parents = []
    codeflash_output = function_kind(node, parents); result = codeflash_output # 732ns -> 661ns

def test_nested_function():
    # Function defined inside another function
    node = make_funcdef("inner")
    parents = [FunctionParent(type="FunctionDef")]
    codeflash_output = function_kind(node, parents); result = codeflash_output # 851ns -> 901ns

def test_class_instance_method():
    # Function defined in class, no decorators
    node = make_funcdef("method")
    parents = [FunctionParent(type="ClassDef")]
    codeflash_output = function_kind(node, parents); result = codeflash_output # 2.30μs -> 1.09μs

def test_class_classmethod():
    # Function defined in class, with @classmethod decorator
    node = make_funcdef("cmethod", decorators=[make_decorator("classmethod")])
    parents = [FunctionParent(type="ClassDef")]
    codeflash_output = function_kind(node, parents); result = codeflash_output # 2.45μs -> 1.32μs

def test_class_staticmethod():
    # Function defined in class, with @staticmethod decorator
    node = make_funcdef("smethod", decorators=[make_decorator("staticmethod")])
    parents = [FunctionParent(type="ClassDef")]
    codeflash_output = function_kind(node, parents); result = codeflash_output # 2.50μs -> 1.20μs

def test_class_multiple_decorators_staticmethod():
    # Function with multiple decorators, staticmethod is one of them
    node = make_funcdef("smethod", decorators=[make_decorator("foo"), make_decorator("staticmethod")])
    parents = [FunctionParent(type="ClassDef")]
    codeflash_output = function_kind(node, parents); result = codeflash_output # 2.65μs -> 1.37μs

def test_class_multiple_decorators_classmethod():
    # Function with multiple decorators, classmethod is one of them
    node = make_funcdef("cmethod", decorators=[make_decorator("foo"), make_decorator("classmethod")])
    parents = [FunctionParent(type="ClassDef")]
    codeflash_output = function_kind(node, parents); result = codeflash_output # 2.47μs -> 1.43μs

def test_class_decorator_order():
    # Function with both classmethod and staticmethod, classmethod first
    node = make_funcdef("cmethod", decorators=[make_decorator("classmethod"), make_decorator("staticmethod")])
    parents = [FunctionParent(type="ClassDef")]
    codeflash_output = function_kind(node, parents); result = codeflash_output # 2.33μs -> 1.25μs

def test_class_decorator_order_static_first():
    # Function with both staticmethod and classmethod, staticmethod first
    node = make_funcdef("cmethod", decorators=[make_decorator("staticmethod"), make_decorator("classmethod")])
    parents = [FunctionParent(type="ClassDef")]
    codeflash_output = function_kind(node, parents); result = codeflash_output # 2.50μs -> 1.27μs

def test_class_other_decorators():
    # Function with unrelated decorator
    node = make_funcdef("other", decorators=[make_decorator("property")])
    parents = [FunctionParent(type="ClassDef")]
    codeflash_output = function_kind(node, parents); result = codeflash_output # 2.26μs -> 1.27μs

# 2. Edge Test Cases

def test_no_parents_empty_list():
    # No parents (empty list)
    node = make_funcdef("foo")
    parents = []
    codeflash_output = function_kind(node, parents); result = codeflash_output # 661ns -> 671ns

def test_parents_none():
    # Parents is None (should behave as no parents)
    node = make_funcdef("foo")
    parents = None
    # Should not raise, should treat as no parents
    codeflash_output = function_kind(node, parents or []); result = codeflash_output # 692ns -> 621ns

def test_parent_not_module_or_class():
    # Parent is something else (e.g., "Module")
    node = make_funcdef("foo")
    parents = [FunctionParent(type="Module")]
    codeflash_output = function_kind(node, parents); result = codeflash_output # 1.75μs -> 501ns

def test_unknown_decorator_type():
    # Decorator is not ast.Name (e.g., ast.Attribute)
    decorator = ast.Attribute(value=ast.Name(id="abc", ctx=ast.Load()), attr="classmethod", ctx=ast.Load())
    node = make_funcdef("foo", decorators=[decorator])
    parents = [FunctionParent(type="ClassDef")]
    codeflash_output = function_kind(node, parents); result = codeflash_output # 2.37μs -> 1.25μs

def test_async_function_in_class():
    # Async function in class, no decorators
    node = make_funcdef("amethod", async_=True)
    parents = [FunctionParent(type="ClassDef")]
    codeflash_output = function_kind(node, parents); result = codeflash_output # 2.07μs -> 991ns

def test_function_with_unusual_parent_types():
    # Parent is some unknown type
    node = make_funcdef("foo")
    parents = [FunctionParent(type="UnknownType")]
    codeflash_output = function_kind(node, parents); result = codeflash_output # 1.69μs -> 531ns

def test_function_with_multiple_parents():
    # Multiple parents, outermost is ClassDef
    node = make_funcdef("foo")
    parents = [FunctionParent(type="ClassDef"), FunctionParent(type="Module")]
    codeflash_output = function_kind(node, parents); result = codeflash_output # 2.21μs -> 1.03μs

def test_function_with_multiple_nested_function_parents():
    # Multiple parents, innermost is FunctionDef, outer is ClassDef
    node = make_funcdef("foo")
    parents = [FunctionParent(type="FunctionDef"), FunctionParent(type="ClassDef")]
    codeflash_output = function_kind(node, parents); result = codeflash_output # 811ns -> 831ns

def test_function_with_asyncfunctiondef_parent():
    # Parent is AsyncFunctionDef
    node = make_funcdef("foo")
    parents = [FunctionParent(type="AsyncFunctionDef")]
    codeflash_output = function_kind(node, parents); result = codeflash_output # 882ns -> 802ns

def test_function_with_decorator_case_sensitivity():
    # Decorator is 'ClassMethod' (wrong case)
    node = make_funcdef("foo", decorators=[make_decorator("ClassMethod")])
    parents = [FunctionParent(type="ClassDef")]
    codeflash_output = function_kind(node, parents); result = codeflash_output # 2.62μs -> 1.37μs

# 3. Large Scale Test Cases

def test_many_functions_module_level():
    # Test 1000 module-level functions
    for i in range(1000):
        node = make_funcdef(f"func_{i}")
        parents = []
        codeflash_output = function_kind(node, parents); result = codeflash_output # 220ns -> 220ns

def test_many_class_methods():
    # Test 500 class methods and 500 static methods in a class
    for i in range(500):
        node = make_funcdef(f"cmethod_{i}", decorators=[make_decorator("classmethod")])
        parents = [FunctionParent(type="ClassDef")]
        codeflash_output = function_kind(node, parents); result = codeflash_output # 651ns -> 441ns
    for i in range(500):
        node = make_funcdef(f"smethod_{i}", decorators=[make_decorator("staticmethod")])
        parents = [FunctionParent(type="ClassDef")]
        codeflash_output = function_kind(node, parents); result = codeflash_output # 651ns -> 441ns

def test_large_mixed_function_types():
    # Mix of module, class, static, classmethod, and instance methods
    for i in range(200):
        # Module-level
        node = make_funcdef(f"func_{i}")
        parents = []
        codeflash_output = function_kind(node, parents) # 240ns -> 240ns

        # Instance method
        node = make_funcdef(f"imethod_{i}")
        parents = [FunctionParent(type="ClassDef")]
        codeflash_output = function_kind(node, parents) # 240ns -> 240ns

        # Static method
        node = make_funcdef(f"smethod_{i}", decorators=[make_decorator("staticmethod")])
        parents = [FunctionParent(type="ClassDef")]
        codeflash_output = function_kind(node, parents) # 240ns -> 240ns

        # Class method
        node = make_funcdef(f"cmethod_{i}", decorators=[make_decorator("classmethod")])
        parents = [FunctionParent(type="ClassDef")]
        codeflash_output = function_kind(node, parents) # 240ns -> 240ns

def test_large_number_of_parents():
    # Deeply nested parents, but top is ClassDef
    node = make_funcdef("foo")
    parents = [FunctionParent(type="ClassDef")] + [FunctionParent(type="Module")] * 999
    codeflash_output = function_kind(node, parents); result = codeflash_output # 17.4μs -> 1.22μs

def test_large_number_of_nested_functions():
    # Deeply nested function (1000 levels)
    node = make_funcdef("foo")
    parents = [FunctionParent(type="FunctionDef")] * 1000
    codeflash_output = function_kind(node, parents); result = codeflash_output # 841ns -> 871ns
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.

To edit these changes git checkout codeflash/optimize-pr309-2025-06-16T21.29.52 and push.

…extension`) Here's an optimized version of your program. Main changes. - Replace slices and length-based for-loops with more direct, idiomatic Python control flow (they did nothing). - Combine checks for better early returns. - Reduce unnecessary list accesses. - Process decorator list without unnecessary nesting. - No changes to function signatures or output. All your in-code comments are preserved (there were none). **Key improvements:** - Direct mapping of `parents[0].type`; no useless range-loop. - Early exit for empty `parents`. - Avoid redundant list traversal. - Set literal for type checking. This function has the same return signature and logic, but runs faster and is easier to reason about.

codeflash-ai Bot added the ⚡️ codeflash Optimization PR opened by Codeflash AI label Jun 16, 2025

codeflash-ai Bot mentioned this pull request Jun 16, 2025

barebones LSP Server implementation #309

Merged

KRRT7 closed this Jun 18, 2025

codeflash-ai Bot deleted the codeflash/optimize-pr309-2025-06-16T21.29.52 branch June 18, 2025 21:04

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⚡️ Speed up function `function_kind` by 39% in PR #309 (`updated-vsc-extension`)#330

⚡️ Speed up function `function_kind` by 39% in PR #309 (`updated-vsc-extension`)#330
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codeflash-ai Bot commented Jun 16, 2025

⚡️ This pull request contains optimizations for PR #309

📄 39% (0.39x) speedup for function_kind in codeflash/code_utils/static_analysis.py

📝 Explanation and details

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📄 39% (0.39x) speedup for `function_kind` in `codeflash/code_utils/static_analysis.py`