⚡️ Speed up function merge_cookies by 72%

[codeflash-ai]

📄 72% (0.72x) speedup for merge_cookies in src/requests/cookies.py

⏱️ Runtime : 22.9 milliseconds → 13.3 milliseconds (best of 103 runs)

📝 Explanation and details

To optimize the given Python programs for better performance, we can make use of more efficient data structures and logic flow. The major optimization here includes avoiding repeated lookups and reducing the use of large intermediate lists.

The primary optimizations include.

1. Using a set instead of a list for names_from_jar to provide O(1) average-time complexity for membership checks instead of O(n) with a list.
2. Avoiding the try-except block and direct use of update method in merge_cookies as it results in an unnecessary overhead. Instead, iterating through cookies directly and setting them into cookiejar as the block inside except was used.

These changes should provide more efficient execution while maintaining the original functionality.

✅ Correctness verification report:

Test	Status
⚙️ Existing Unit Tests	🔘 None Found
🌀 Generated Regression Tests	✅ 31 Passed
⏪ Replay Tests	🔘 None Found
🔎 Concolic Coverage Tests	🔘 None Found
📊 Tests Coverage	78.9%

🌀 Generated Regression Tests Details

import pytest  # used for our unit tests
from requests.cookies import RequestsCookieJar, create_cookie
# function to test
from src.requests.compat import cookielib
from src.requests.cookies import merge_cookies

# unit tests

def test_merge_dict_into_empty_cookiejar():
    # Test merging a dictionary into an empty CookieJar
    cookiejar = RequestsCookieJar()
    cookies = {'session_id': 'abc123'}
    codeflash_output = merge_cookies(cookiejar, cookies)

def test_merge_cookiejar_into_empty_cookiejar():
    # Test merging a CookieJar into another empty CookieJar
    cookiejar = RequestsCookieJar()
    other_cookiejar = RequestsCookieJar()
    other_cookiejar.set_cookie(create_cookie('user_id', 'user456'))
    codeflash_output = merge_cookies(cookiejar, other_cookiejar)

def test_empty_cookiejar_and_empty_dict():
    # Test merging an empty dictionary into an empty CookieJar
    cookiejar = RequestsCookieJar()
    cookies = {}
    codeflash_output = merge_cookies(cookiejar, cookies)

def test_empty_cookiejar_and_empty_cookiejar():
    # Test merging an empty CookieJar into another empty CookieJar
    cookiejar = RequestsCookieJar()
    other_cookiejar = RequestsCookieJar()
    codeflash_output = merge_cookies(cookiejar, other_cookiejar)

def test_non_overlapping_cookies():
    # Test merging non-overlapping cookies
    cookiejar = RequestsCookieJar()
    cookiejar.set_cookie(create_cookie('session_id', 'abc123'))
    cookies = {'user_id': 'user456'}
    codeflash_output = merge_cookies(cookiejar, cookies)

def test_overlapping_cookies_no_overwrite():
    # Test merging overlapping cookies with overwrite=False
    cookiejar = RequestsCookieJar()
    cookiejar.set_cookie(create_cookie('session_id', 'abc123'))
    cookies = {'session_id': 'xyz789'}
    codeflash_output = merge_cookies(cookiejar, cookies)

def test_overlapping_cookies_with_overwrite():
    # Test merging overlapping cookies with overwrite=True
    cookiejar = RequestsCookieJar()
    cookiejar.set_cookie(create_cookie('session_id', 'abc123'))
    cookies = {'session_id': 'xyz789'}
    codeflash_output = merge_cookies(cookiejar, cookies)

def test_invalid_cookiejar_input():
    # Test passing a non-CookieJar object as cookiejar
    with pytest.raises(ValueError):
        merge_cookies([], {'session_id': 'abc123'})


def test_large_scale_dict():
    # Test merging a large dictionary of cookies
    cookiejar = RequestsCookieJar()
    cookies = {f'cookie_{i}': f'value_{i}' for i in range(1000)}
    codeflash_output = merge_cookies(cookiejar, cookies)

def test_large_scale_cookiejar():
    # Test merging a large CookieJar object
    cookiejar = RequestsCookieJar()
    other_cookiejar = RequestsCookieJar()
    for i in range(1000):
        other_cookiejar.set_cookie(create_cookie(f'cookie_{i}', f'value_{i}'))
    codeflash_output = merge_cookies(cookiejar, other_cookiejar)

def test_mixed_types_in_dict():
    # Test merging a dictionary with mixed types of values
    cookiejar = RequestsCookieJar()
    cookies = {'session_id': 123, 'user_id': 'user456', 'expiry': None}
    codeflash_output = merge_cookies(cookiejar, cookies)

def test_special_characters_in_cookies():
    # Test merging cookies with special characters in names and values
    cookiejar = RequestsCookieJar()
    cookies = {'sess!on_id': 'abc@123', 'user_id': 'user#456'}
    codeflash_output = merge_cookies(cookiejar, cookies)

def test_none_cookies():
    # Test merging None as cookies
    cookiejar = RequestsCookieJar()
    codeflash_output = merge_cookies(cookiejar, None)

def test_deterministic_behavior():
    # Test that the function behaves deterministically
    cookiejar = RequestsCookieJar()
    cookies = {'session_id': 'abc123'}
    codeflash_output = merge_cookies(cookiejar, cookies)
    codeflash_output = merge_cookies(cookiejar, cookies)



import pytest  # used for our unit tests
from requests.cookies import RequestsCookieJar, create_cookie
from src.requests.compat import cookielib
from src.requests.cookies import merge_cookies

# unit tests

def test_merge_dict_into_empty_cookiejar():
    cookiejar = RequestsCookieJar()
    cookies = {"session_id": "abc123"}
    codeflash_output = merge_cookies(cookiejar, cookies)

def test_merge_dict_into_non_empty_cookiejar():
    cookiejar = RequestsCookieJar()
    cookiejar.set_cookie(create_cookie("user", "john_doe"))
    cookies = {"session_id": "abc123"}
    codeflash_output = merge_cookies(cookiejar, cookies)

def test_merge_cookiejar_into_empty_cookiejar():
    cookiejar = RequestsCookieJar()
    cookies = RequestsCookieJar()
    cookies.set_cookie(create_cookie("session_id", "abc123"))
    codeflash_output = merge_cookies(cookiejar, cookies)

def test_merge_cookiejar_into_non_empty_cookiejar():
    cookiejar = RequestsCookieJar()
    cookiejar.set_cookie(create_cookie("user", "john_doe"))
    cookies = RequestsCookieJar()
    cookies.set_cookie(create_cookie("session_id", "abc123"))
    codeflash_output = merge_cookies(cookiejar, cookies)

def test_empty_dict_as_input():
    cookiejar = RequestsCookieJar()
    cookies = {}
    codeflash_output = merge_cookies(cookiejar, cookies)

def test_empty_cookiejar_as_input():
    cookiejar = RequestsCookieJar()
    cookies = RequestsCookieJar()
    codeflash_output = merge_cookies(cookiejar, cookies)

def test_none_as_input_for_cookies():
    cookiejar = RequestsCookieJar()
    cookies = None
    codeflash_output = merge_cookies(cookiejar, cookies)

def test_duplicate_cookies_no_overwrite():
    cookiejar = RequestsCookieJar()
    cookiejar.set_cookie(create_cookie("session_id", "old_value"))
    cookies = {"session_id": "new_value"}
    codeflash_output = merge_cookies(cookiejar, cookies)

def test_duplicate_cookies_with_overwrite():
    cookiejar = RequestsCookieJar()
    cookiejar.set_cookie(create_cookie("session_id", "old_value"))
    cookies = {"session_id": "new_value"}
    codeflash_output = merge_cookies(cookiejar, cookies)

def test_invalid_cookiejar_type():
    cookiejar = []
    cookies = {"session_id": "abc123"}
    with pytest.raises(ValueError):
        merge_cookies(cookiejar, cookies)


def test_large_number_of_cookies_in_dict():
    cookiejar = RequestsCookieJar()
    cookies = {f"cookie_{i}": f"value_{i}" for i in range(1000)}
    codeflash_output = merge_cookies(cookiejar, cookies)

def test_large_number_of_cookies_in_cookiejar():
    cookiejar = RequestsCookieJar()
    cookies = RequestsCookieJar()
    for i in range(1000):
        cookies.set_cookie(create_cookie(f"cookie_{i}", f"value_{i}"))
    codeflash_output = merge_cookies(cookiejar, cookies)

def test_merging_large_cookiejar_into_another():
    cookiejar = RequestsCookieJar()
    for i in range(1000):
        cookiejar.set_cookie(create_cookie(f"cookie_{i}", f"value_{i}"))
    cookies = RequestsCookieJar()
    for i in range(1000, 2000):
        cookies.set_cookie(create_cookie(f"cookie_{i}", f"value_{i}"))
    codeflash_output = merge_cookies(cookiejar, cookies)

def test_consistent_results_for_same_input():
    cookiejar = RequestsCookieJar()
    cookiejar.set_cookie(create_cookie("session_id", "abc123"))
    cookies = {"user": "john_doe"}
    codeflash_output = merge_cookies(cookiejar, cookies)
    codeflash_output = merge_cookies(cookiejar, cookies)

def test_original_cookiejar_is_mutated():
    cookiejar = RequestsCookieJar()
    cookies = {"session_id": "abc123"}
    merge_cookies(cookiejar, cookies)
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.

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