⚡️ Speed up function sorter by 117,876%

[codeflash-ai]

📄 117,876% (1,178.76x) speedup for sorter in code_to_optimize/bubble_sort.py

⏱️ Runtime : 4.86 seconds → 4.12 milliseconds (best of 68 runs)

📝 Explanation and details

Here is an optimized version of your program using Python's built-in sort() method which is much faster than bubble sort.
All function signatures and print statements are preserved as requested.

This replaces the O(n²) bubble sort with the highly optimized Timsort algorithm (average/best O(n log n)), greatly improving speed and reducing memory usage since it is in-place.

✅ Correctness verification report:

Test	Status
⚙️ Existing Unit Tests	✅ 13 Passed
🌀 Generated Regression Tests	✅ 54 Passed
⏪ Replay Tests	🔘 None Found
🔎 Concolic Coverage Tests	🔘 None Found
📊 Tests Coverage	undefined

⚙️ Existing Unit Tests Details

- test_bubble_sort.py
- test_bubble_sort_conditional.py
- test_bubble_sort_import.py
- test_bubble_sort_in_class.py
- test_bubble_sort_parametrized.py
- test_bubble_sort_parametrized_loop.py

🌀 Generated Regression Tests Details

import random  # used for generating large random test cases
import string  # used for string sorting test cases
import sys  # used for testing with extreme values

# imports
import pytest  # used for our unit tests
from code_to_optimize.bubble_sort import sorter

# unit tests

# ---------------------------
# Basic Test Cases
# ---------------------------

def test_empty_list():
    # Test sorting an empty list
    arr = []
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_single_element():
    # Test sorting a single element list
    arr = [42]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_already_sorted():
    # Test sorting an already sorted list
    arr = [1, 2, 3, 4, 5]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_reverse_sorted():
    # Test sorting a reverse sorted list
    arr = [5, 4, 3, 2, 1]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_random_order():
    # Test sorting a random order list
    arr = [3, 1, 4, 5, 2]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_duplicates():
    # Test sorting a list with duplicate elements
    arr = [2, 3, 2, 1, 3]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_negative_numbers():
    # Test sorting a list with negative numbers
    arr = [-3, -1, -2, 0, 2, 1]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_mixed_positive_negative():
    # Test sorting a list with both positive and negative numbers
    arr = [3, -1, 0, -2, 2, 1]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

# ---------------------------
# Edge Test Cases
# ---------------------------

def test_all_identical():
    # Test sorting a list where all elements are identical
    arr = [7, 7, 7, 7, 7]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_two_elements_sorted():
    # Test sorting a two-element list that is already sorted
    arr = [1, 2]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_two_elements_unsorted():
    # Test sorting a two-element list that is not sorted
    arr = [2, 1]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_large_and_small_numbers():
    # Test sorting a list with very large and very small numbers
    arr = [sys.maxsize, -sys.maxsize-1, 0, 1, -1]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_floats():
    # Test sorting a list with floating point numbers
    arr = [3.2, 1.5, 4.8, 2.1, -0.5]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_integers_and_floats():
    # Test sorting a list with both integers and floats
    arr = [3, 1.2, 2, 4.5, 0]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_strings():
    # Test sorting a list of strings
    arr = ["banana", "apple", "cherry", "date"]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_strings_with_case():
    # Test sorting a list of strings with different cases
    arr = ["banana", "Apple", "cherry", "Date"]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_unicode_strings():
    # Test sorting a list of unicode strings
    arr = ["éclair", "apple", "Éclair", "banana"]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_list_with_none():
    # Test sorting a list containing None should raise TypeError
    arr = [1, None, 2]
    with pytest.raises(TypeError):
        sorter(arr.copy())

def test_list_with_unorderable_types():
    # Test sorting a list with unorderable types should raise TypeError
    arr = [1, "a", 2]
    with pytest.raises(TypeError):
        sorter(arr.copy())

def test_list_with_nan():
    # Test sorting a list containing float('nan')
    arr = [3, float('nan'), 2]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_mutation_of_input():
    # Test that the sorter function sorts in-place (since it sorts the input list)
    arr = [3, 2, 1]
    sorter(arr)

# ---------------------------
# Large Scale Test Cases
# ---------------------------

def test_large_sorted_list():
    # Test sorting a large already sorted list
    arr = list(range(1000))
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_large_reverse_sorted_list():
    # Test sorting a large reverse sorted list
    arr = list(range(999, -1, -1))
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_large_random_list():
    # Test sorting a large random list
    arr = random.sample(range(1000), 1000)
    expected = sorted(arr)
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_large_list_with_duplicates():
    # Test sorting a large list with many duplicates
    arr = [random.choice([1, 2, 3, 4, 5]) for _ in range(1000)]
    expected = sorted(arr)
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_large_strings_list():
    # Test sorting a large list of random strings
    arr = [''.join(random.choices(string.ascii_letters, k=5)) for _ in range(1000)]
    expected = sorted(arr)
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_large_negative_numbers():
    # Test sorting a large list of negative numbers
    arr = [random.randint(-10000, -1) for _ in range(1000)]
    expected = sorted(arr)
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_large_floats():
    # Test sorting a large list of floats
    arr = [random.uniform(-1000, 1000) for _ in range(1000)]
    expected = sorted(arr)
    codeflash_output = sorter(arr.copy()); result = codeflash_output
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.

import random  # used for generating large random lists
import string  # used for string sorting tests

# imports
import pytest  # used for our unit tests
from code_to_optimize.bubble_sort import sorter

# unit tests

# ------------------- BASIC TEST CASES -------------------

def test_sorter_empty_list():
    # Test sorting an empty list
    arr = []
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_sorter_single_element():
    # Test sorting a list with a single element
    arr = [42]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_sorter_sorted_list():
    # Test sorting an already sorted list
    arr = [1, 2, 3, 4, 5]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_sorter_reverse_sorted_list():
    # Test sorting a reverse sorted list
    arr = [5, 4, 3, 2, 1]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_sorter_duplicates():
    # Test sorting a list with duplicate elements
    arr = [3, 1, 2, 3, 2]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_sorter_negative_numbers():
    # Test sorting a list with negative numbers
    arr = [-3, -1, -2, 0, 2]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_sorter_mixed_positive_negative():
    # Test sorting a list with both positive and negative numbers
    arr = [5, -10, 0, 7, -3]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_sorter_all_equal():
    # Test sorting a list where all elements are equal
    arr = [7, 7, 7, 7]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_sorter_floats():
    # Test sorting a list with floating point numbers
    arr = [2.5, 3.1, 0.0, -1.2]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_sorter_strings():
    # Test sorting a list of strings
    arr = ["banana", "apple", "cherry"]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_sorter_mixed_types_raises():
    # Test sorting a list with incomparable types (should raise TypeError)
    arr = [1, "a", 2]
    with pytest.raises(TypeError):
        sorter(arr.copy())

# ------------------- EDGE TEST CASES -------------------

def test_sorter_large_negative_and_positive():
    # Test sorting with very large and very small integers
    arr = [999999999, -999999999, 0, 123456, -123456]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_sorter_min_max_int():
    # Test sorting with min and max integer values
    import sys
    arr = [sys.maxsize, -sys.maxsize - 1, 0]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_sorter_unicode_strings():
    # Test sorting with unicode strings (including accented characters)
    arr = ["éclair", "apple", "Éclair", "banana"]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_sorter_empty_strings():
    # Test sorting with empty strings
    arr = ["", "a", "b", ""]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_sorter_all_empty_strings():
    # Test sorting with all elements as empty strings
    arr = ["", "", ""]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_sorter_mutation_of_input():
    # Test that the function mutates the input list (since it does so in-place)
    arr = [2, 1]
    sorter(arr)

def test_sorter_with_lists_as_elements_raises():
    # Test sorting a list of lists (should raise TypeError if elements are not comparable)
    arr = [[1,2], [1,1], [2,2]]
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_sorter_with_none_raises():
    # Test sorting a list containing None (should raise TypeError)
    arr = [1, None, 2]
    with pytest.raises(TypeError):
        sorter(arr.copy())

def test_sorter_custom_objects_raises():
    # Test sorting a list of objects that do not support comparison
    class A:
        pass
    arr = [A(), A()]
    with pytest.raises(TypeError):
        sorter(arr.copy())

# ------------------- LARGE SCALE TEST CASES -------------------

def test_sorter_large_random_list():
    # Test sorting a large list of random integers (size 1000)
    arr = random.sample(range(-10000, -9000), 1000)
    expected = sorted(arr)
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_sorter_large_sorted_list():
    # Test sorting a large already sorted list
    arr = list(range(1000))
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_sorter_large_reverse_sorted_list():
    # Test sorting a large reverse sorted list
    arr = list(range(999, -1, -1))
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_sorter_large_duplicates():
    # Test sorting a large list with many duplicates
    arr = [random.choice([1, 2, 3, 4, 5]) for _ in range(1000)]
    expected = sorted(arr)
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_sorter_large_strings():
    # Test sorting a large list of random strings
    arr = [''.join(random.choices(string.ascii_letters, k=5)) for _ in range(1000)]
    expected = sorted(arr)
    codeflash_output = sorter(arr.copy()); result = codeflash_output

def test_sorter_large_floats():
    # Test sorting a large list of random floats
    arr = [random.uniform(-10000, 10000) for _ in range(1000)]
    expected = sorted(arr)
    codeflash_output = sorter(arr.copy()); result = codeflash_output
# 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-sorter-mbg2njsp and push.