⚡️ Speed up function _is_separating_line by 18% in PR #110 (trace-deterministic)

[codeflash-ai]

⚡️ This pull request contains optimizations for PR #110

If you approve this dependent PR, these changes will be merged into the original PR branch trace-deterministic.

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

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📄 18% (0.18x) speedup for _is_separating_line in codeflash/code_utils/tabulate.py

⏱️ Runtime : 49.2 microseconds → 41.6 microseconds (best of 509 runs)

📝 Explanation and details

To optimize the functions _is_separating_line_value and _is_separating_line, we can take several steps.

1. Inline and Simplify: Since _is_separating_line_value is quite small and used in a tight loop, inlining the check within _is_separating_line can save function call overhead.
2. Reduce Type Checks: Instead of checking the type multiple times, simplify the boolean logic to ensure clarity and efficiency.
3. Early Exit: If a check fails, we can return immediately.

Here's the optimized version of the given code.

Explanation of Changes.

1. Inline Check: The logic of _is_separating_line_value is inlined within the main function.
2. Simplify Boolean Checks: Combined the type checks and string type verifications into single if-statements.
3. Early Exits: Each condition returns as soon as a match is found, minimizing unnecessary evaluations.

These optimizations target both runtime efficiency and clarity.

✅ Correctness verification report:

Test	Status
⚙️ Existing Unit Tests	🔘 None Found
🌀 Generated Regression Tests	✅ 57 Passed
⏪ Replay Tests	🔘 None Found
🔎 Concolic Coverage Tests	🔘 None Found
📊 Tests Coverage

🌀 Generated Regression Tests Details

import re
from collections import namedtuple

# imports
import pytest  # used for our unit tests
import wcwidth
from codeflash.code_utils.tabulate import _is_separating_line

# unit tests

def test_basic_functionality():
    # Test single element list with separating line
    codeflash_output = _is_separating_line(["\001"])
    # Test single element list without separating line
    codeflash_output = _is_separating_line(["not_a_separator"])
    # Test single element string with separating line
    codeflash_output = _is_separating_line("\001")
    # Test single element string without separating line
    codeflash_output = _is_separating_line("not_a_separator")

def test_multiple_elements_in_list():
    # Test first element is separating line
    codeflash_output = _is_separating_line(["\001", "data"])
    # Test second element is separating line
    codeflash_output = _is_separating_line(["data", "\001"])
    # Test no separating line in list
    codeflash_output = _is_separating_line(["data1", "data2"])

def test_multiple_elements_in_string():
    # Test first character is separating line
    codeflash_output = _is_separating_line("\001data")
    # Test second character is separating line
    codeflash_output = _is_separating_line("d\001ata")
    # Test no separating line in string
    codeflash_output = _is_separating_line("data")

def test_edge_cases():
    # Test empty list
    codeflash_output = _is_separating_line([])
    # Test empty string
    codeflash_output = _is_separating_line("")
    # Test list with empty string
    codeflash_output = _is_separating_line([""])
    # Test list with white space
    codeflash_output = _is_separating_line([" "])
    # Test string with white space
    codeflash_output = _is_separating_line(" ")
    # Test list with mixed data types
    codeflash_output = _is_separating_line([1, "\001"])  # since the first element is not a string
    codeflash_output = _is_separating_line(["\001", 2])  # since the first element is a separating line

def test_large_scale_test_cases():
    # Test large list with separating line in the middle
    codeflash_output = _is_separating_line(["data"] * 10000 + ["\001"] + ["data"] * 10000)
    # Test large list without separating line
    codeflash_output = _is_separating_line(["data"] * 20000)
    # Test large string with separating line in the middle
    codeflash_output = _is_separating_line("data" * 10000 + "\001" + "data" * 10000)
    # Test large string without separating line
    codeflash_output = _is_separating_line("data" * 20000)

def test_mixed_content():
    # Test list with separating line and special characters
    codeflash_output = _is_separating_line(["\001", "@", "#", "$"])
    # Test string with separating line and special characters
    codeflash_output = _is_separating_line("\001@#$")
    # Test list with unicode characters
    codeflash_output = _is_separating_line(["\001", "数据"])
    codeflash_output = _is_separating_line(["数据", "\001"])
    codeflash_output = _is_separating_line(["数据", "信息"])

def test_complex_nested_structures():
    # Test nested list
    codeflash_output = _is_separating_line([[["\001"]]])  # since the first element is not a string or list directly
    # Test list of lists
    codeflash_output = _is_separating_line([[1, 2], ["\001"]])  # since the first element is not a string or list directly
    codeflash_output = _is_separating_line([["\001"], [1, 2]])  # since the first element is a separating line
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.

import re
from collections import namedtuple

# imports
import pytest  # used for our unit tests
import wcwidth
from codeflash.code_utils.tabulate import _is_separating_line

# unit tests

# Basic Functionality
def test_single_element_separating_line_list():
    codeflash_output = _is_separating_line(["\001"])

def test_single_element_separating_line_string():
    codeflash_output = _is_separating_line("\001")

# Non-Separating Lines
def test_single_element_non_separating_line_list():
    codeflash_output = _is_separating_line(["not a separator"])

def test_single_element_non_separating_line_string():
    codeflash_output = _is_separating_line("not a separator")

def test_multiple_elements_without_separating_line_list():
    codeflash_output = _is_separating_line(["data1", "data2"])

def test_multiple_elements_without_separating_line_string():
    codeflash_output = _is_separating_line("data1data2")

# Leading Separating Line
def test_separating_line_first_element_list():
    codeflash_output = _is_separating_line(["\001", "data"])

def test_separating_line_first_element_string():
    codeflash_output = _is_separating_line("\001data")

# Second Element Separating Line
def test_separating_line_second_element_list():
    codeflash_output = _is_separating_line(["data", "\001"])

def test_separating_line_second_element_string():
    codeflash_output = _is_separating_line("d\001")

# Edge Cases
def test_empty_row_list():
    codeflash_output = _is_separating_line([])

def test_empty_row_string():
    codeflash_output = _is_separating_line("")

def test_single_whitespace_character_list():
    codeflash_output = _is_separating_line([" "])

def test_single_whitespace_character_string():
    codeflash_output = _is_separating_line(" ")

def test_multiple_whitespace_characters_list():
    codeflash_output = _is_separating_line(["   "])

def test_multiple_whitespace_characters_string():
    codeflash_output = _is_separating_line("   ")

def test_separating_line_with_whitespace_list():
    codeflash_output = _is_separating_line([" \001 "])

def test_separating_line_with_whitespace_string():
    codeflash_output = _is_separating_line(" \001 ")

# Mixed Data Types
def test_non_string_non_list_input_integer():
    codeflash_output = _is_separating_line(123)

def test_non_string_non_list_input_dict():
    codeflash_output = _is_separating_line({"key": "value"})

# Complex Rows
def test_complex_row_list():
    codeflash_output = _is_separating_line(["data", 123, "\001", None])

def test_complex_row_string():
    codeflash_output = _is_separating_line("data123\001None")

# Large Scale Test Cases
def test_large_list_separating_line_beginning():
    codeflash_output = _is_separating_line(["\001"] + ["data"] * 1000)

def test_large_list_separating_line_end():
    codeflash_output = _is_separating_line(["data"] * 1000 + ["\001"])

def test_large_list_separating_line_middle():
    codeflash_output = _is_separating_line(["data"] * 500 + ["\001"] + ["data"] * 500)

def test_large_string_separating_line_beginning():
    codeflash_output = _is_separating_line("\001" + "data" * 1000)

def test_large_string_separating_line_end():
    codeflash_output = _is_separating_line("data" * 1000 + "\001")

def test_large_string_separating_line_middle():
    codeflash_output = _is_separating_line("data" * 500 + "\001" + "data" * 500)
# 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-pr110-2025-04-03T09.37.17 and push.