⚡️ Speed up function split_string by 14%

[codeflash-ai]

📄 14% (0.14x) speedup for split_string in evaluation/benchmarks/gaia/scorer.py

⏱️ Runtime : 26.0 milliseconds → 22.8 milliseconds (best of 142 runs)

📝 Explanation and details

To optimize the given program, we can make the following improvements.

1. Compile the Regular Expression: Instead of compiling the regular expression every time the function is called, we can compile it once and store it using an lru_cache. This is based on the assumption that the list of delimiters does not change often.

Here's the updated code.

Changes Made.

• A helper function compile_pattern is added and decorated with lru_cache to ensure the compiled pattern is stored and reused for the same set of delimiters.
• Converted char_list to a tuple before passing to compile_pattern since lru_cache requires its arguments to be hashable.
• This change reduces redundant computation of the pattern every time split_string is called with the same set of delimiters.

✅ Correctness verification report:

Test	Status
⚙️ Existing Unit Tests	🔘 None Found
🌀 Generated Regression Tests	✅ 36 Passed
⏪ Replay Tests	🔘 None Found
🔎 Concolic Coverage Tests	✅ 1 Passed
📊 Tests Coverage	100.0%

🌀 Generated Regression Tests Details

import re

# imports
import pytest  # used for our unit tests
from evaluation.benchmarks.gaia.scorer import split_string

# unit tests

def test_single_delimiter():
    # Test with a single delimiter
    codeflash_output = split_string("a,b,c", [','])

def test_multiple_delimiters():
    # Test with multiple delimiters
    codeflash_output = split_string("a;b,c", [',', ';'])

def test_default_delimiters():
    # Test using default delimiters
    codeflash_output = split_string("a;b,c")

def test_empty_string():
    # Test with an empty string
    codeflash_output = split_string("", [','])

def test_no_delimiters_in_string():
    # Test when there are no delimiters in the string
    codeflash_output = split_string("abc", [','])

def test_consecutive_delimiters():
    # Test with consecutive delimiters
    codeflash_output = split_string("a,,b", [','])

def test_delimiters_at_start_and_end():
    # Test with delimiters at the start and end of the string
    codeflash_output = split_string(",a,b,", [','])

def test_special_regex_characters():
    # Test with special regex characters as delimiters
    codeflash_output = split_string("a.b*c", ['.', '*'])


def test_large_input_string():
    # Test with a large input string
    codeflash_output = split_string("a," * 10000, [','])

def test_large_number_of_delimiters():
    # Test with a large number of delimiters
    codeflash_output = split_string("a" + "," * 10000 + "b", [','])

def test_unicode_characters():
    # Test with unicode characters
    codeflash_output = split_string("a,😊,b", [','])

def test_numerical_delimiters():
    # Test with numerical delimiters
    codeflash_output = split_string("a1b2c", ['1', '2'])

def test_performance_high_complexity():
    # Performance test with high complexity patterns
    codeflash_output = split_string("a" * 10000 + ",b", [','])
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.

import re  # used in the function to test

# imports
import pytest  # used for our unit tests
from evaluation.benchmarks.gaia.scorer import split_string

# unit tests

def test_default_delimiters():
    # Basic functionality with default delimiters
    codeflash_output = split_string("a,b;c")
    codeflash_output = split_string("a;b,c;")

def test_custom_delimiters():
    # Basic functionality with custom delimiters
    codeflash_output = split_string("a|b|c", char_list=['|'])
    codeflash_output = split_string("a.b.c", char_list=['.'])

def test_empty_string():
    # Edge case: empty string
    codeflash_output = split_string("")
    codeflash_output = split_string("", char_list=['|'])

def test_no_delimiters_present():
    # Edge case: no delimiters present in the string
    codeflash_output = split_string("abc")
    codeflash_output = split_string("abc", char_list=['|'])

def test_consecutive_delimiters():
    # Edge case: consecutive delimiters
    codeflash_output = split_string("a,,b;;c")
    codeflash_output = split_string("a||b||c", char_list=['|'])

def test_delimiters_at_start_end():
    # Edge case: delimiters at the start and end of the string
    codeflash_output = split_string(",a,b;")
    codeflash_output = split_string("|a|b|", char_list=['|'])

def test_single_character_string():
    # Edge case: single character string
    codeflash_output = split_string("a")
    codeflash_output = split_string("|", char_list=['|'])

def test_special_characters_in_delimiters():
    # Special characters as delimiters
    codeflash_output = split_string("a.b.c", char_list=['.'])
    codeflash_output = split_string("a*b*c", char_list=['*'])

def test_large_scale_repeated_patterns():
    # Large scale: repeated patterns
    codeflash_output = split_string("a,b;" * 1000)
    codeflash_output = split_string("a|b|" * 1000, char_list=['|'])

def test_large_number_of_delimiters():
    # Large scale: large number of delimiters
    codeflash_output = split_string(",".join(["a"] * 1000))
    codeflash_output = split_string("|".join(["a"] * 1000), char_list=['|'])

def test_very_large_string():
    # Performance: very large string
    large_string = "a," * 500000 + "b"
    codeflash_output = split_string(large_string)

def test_mixed_delimiters():
    # Complex patterns: mixed delimiters
    codeflash_output = split_string("a,b;c|d", char_list=[',', ';', '|'])
    codeflash_output = split_string("a.b|c,d", char_list=['.', '|', ','])
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.

from evaluation.benchmarks.gaia.scorer import split_string

def test_split_string():
    split_string('', char_list=['\x00'])

To edit these changes git checkout codeflash/optimize-split_string-m8wpgcce and push.