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@misrasaurabh1 misrasaurabh1 commented Mar 21, 2025

PR Type

Enhancement


Description

  • Add bubble sort algorithm implementation

  • Update workflow file trigger pattern

  • Remove unused POSTHOG API key environment var


Changes walkthrough 📝

Relevant files
Enhancement
bubble_sort.py
Add bubble sort sorter function                                                   

codeflash/bubble_sort.py

  • Introduces sorter function implementing bubble sort
  • Swaps adjacent elements when out of order
  • Returns the sorted array
  • +8/-0     
    Configuration changes
    codeflash-optimize.yaml
    Update workflow trigger and environment vars                         

    .github/workflows/codeflash-optimize.yaml

  • Limits workflow trigger to codeflash directory
  • Removes POSTHOG_API_KEY from environment variables
  • +1/-2     

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    PR Reviewer Guide 🔍

    Here are some key observations to aid the review process:

    ⏱️ Estimated effort to review: 2 🔵🔵⚪⚪⚪
    🧪 No relevant tests
    🔒 No security concerns identified
    ⚡ Recommended focus areas for review

    Code Quality

    Consider adding a docstring, type hints, or input validation to clarify the behavior and expectations of the bubble sort implementation.

    def sorter(arr):
        for i in range(len(arr)):
            for j in range(len(arr) - 1):
                if arr[j] > arr[j + 1]:
                    temp = arr[j]
                    arr[j] = arr[j + 1]
                    arr[j + 1] = temp
        return arr
    Workflow Trigger

    Confirm that narrowing the pull_request trigger to the codeflash directory covers all intended scenarios and does not inadvertently prevent other relevant changes from triggering the workflow.

    - "codeflash/**"

    @github-actions
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    PR Code Suggestions ✨

    Explore these optional code suggestions:

    CategorySuggestion                                                                                                                                    Impact
    General
    Optimize inner loop range

    Optimize the inner loop to reduce unnecessary comparisons by using the decreasing
    range.

    codeflash/bubble_sort.py [3]

    -for j in range(len(arr) - 1):
    +for j in range(len(arr) - i - 1):
    Suggestion importance[1-10]: 7

    __

    Why: The suggestion correctly optimizes the inner loop by reducing unnecessary comparisons, which can improve performance in a bubble sort. It is directly derived from the existing diff context and enhances functionality.

    Medium
    Append newline at end

    Ensure the file ends with a trailing newline for consistent formatting.

    codeflash/bubble_sort.py [1-8]

    Suggestion importance[1-10]: 2

    __

    Why: The suggestion addresses a minor formatting concern by ensuring a trailing newline, which is a negligible improvement in terms of functionality and code correctness.

    Low

    codeflash-ai bot added a commit that referenced this pull request Mar 21, 2025
    …ort`)
    
    Sure, the given code is an implementation of Bubble Sort, which is inefficient. We can optimize it by using Python's built-in sorting function which is highly optimized.
    
    Here is the optimized version.
    
    
    
    This optimized version utilizes Timsort, which has a time complexity of O(n log n) in the worst case, making the sorting process significantly faster than the original Bubble Sort implementation.
    codeflash-ai bot added a commit that referenced this pull request Mar 21, 2025
    …ort`)
    
    I will optimize the provided code using the built-in `sort` function, which is implemented in C and is much faster than the bubble sort algorithm originally used in the code. Here is the optimized version.
    
    
    
    This change improves both the runtime and the memory requirements of the function, as the built-in `sort` method in Python uses Timsort, which has an average-case time complexity of O(n log n) and is highly optimized. 
    
    Preserving the original behavior per the requirement, the function still returns the sorted array.
    Comment on lines +2 to +8
    for i in range(len(arr)):
    for j in range(len(arr) - 1):
    if arr[j] > arr[j + 1]:
    temp = arr[j]
    arr[j] = arr[j + 1]
    arr[j + 1] = temp
    return arr No newline at end of file
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    Suggested change
    for i in range(len(arr)):
    for j in range(len(arr) - 1):
    if arr[j] > arr[j + 1]:
    temp = arr[j]
    arr[j] = arr[j + 1]
    arr[j + 1] = temp
    return arr
    arr.sort()
    return arr

    @codeflash-ai
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    codeflash-ai bot commented Mar 21, 2025

    ⚡️ Codeflash found optimizations for this PR

    📄 624,321% (6,243.21x) speedup for sorter in codeflash/bubble_sort.py

    ⏱️ Runtime : 281 milliseconds 45.0 microseconds (best of 521 runs)

    📝 Explanation and details

    I will optimize the provided code using the built-in sort function, which is implemented in C and is much faster than the bubble sort algorithm originally used in the code. Here is the optimized version.

    This change improves both the runtime and the memory requirements of the function, as the built-in sort method in Python uses Timsort, which has an average-case time complexity of O(n log n) and is highly optimized.

    Preserving the original behavior per the requirement, the function still returns the sorted array.

    Correctness verification report:

    Test Status
    ⚙️ Existing Unit Tests 🔘 None Found
    🌀 Generated Regression Tests 44 Passed
    ⏪ Replay Tests 🔘 None Found
    🔎 Concolic Coverage Tests 🔘 None Found
    📊 Tests Coverage undefined
    🌀 Generated Regression Tests Details
    import pytest  # used for our unit tests
    from codeflash.bubble_sort import sorter
    
    # unit tests
    
    @pytest.mark.parametrize("input_list, expected_output", [
        # Basic Functionality
        ([3, 1, 2], [1, 2, 3]),  # simple unsorted list
        ([5, 4, 3, 2, 1], [1, 2, 3, 4, 5]),  # reverse sorted list
        ([1, 2, 3], [1, 2, 3]),  # already sorted list
        ([1, 2, 3, 4, 5], [1, 2, 3, 4, 5]),  # already sorted list
        ([3, 2, 1], [1, 2, 3]),  # reverse sorted list
        
        # Edge Cases
        ([], []),  # empty list
        ([1], [1]),  # single element list
        ([2, 1], [1, 2]),  # two elements unsorted
        ([1, 2], [1, 2]),  # two elements sorted
        
        # Lists with Duplicates
        ([1, 1, 1], [1, 1, 1]),  # all elements same
        ([3, 1, 2, 2, 1], [1, 1, 2, 2, 3]),  # some elements same
        ([4, 5, 4, 3, 3, 2, 1], [1, 2, 3, 3, 4, 4, 5]),  # some elements same
        
        # Lists with Negative Numbers
        ([-1, -3, -2, 0, 2, 1], [-3, -2, -1, 0, 1, 2]),  # negative and positive numbers
        ([-3, -1, -2], [-3, -2, -1]),  # all negative numbers
        
        # Lists with Mixed Data Types
        ([1.1, 2.2, 0.5, 3], [0.5, 1.1, 2.2, 3]),  # integers and floats
        ([3, 1.5, 2.5, 1], [1, 1.5, 2.5, 3]),  # integers and floats
        
        # Large Scale Test Cases
        (list(range(1000, 0, -1)), list(range(1, 1001))),  # large list in reverse order
        (list(range(10000, 9000, -1)), list(range(1, 1001))),  # very large list in reverse order
        
        # Performance and Scalability
        (list(range(100000, 99000, -1)), list(range(1, 1001))),  # very large list in reverse order
    ])
    def test_sorter(input_list, expected_output):
        # Test the sorter function with various inputs and expected outputs
        codeflash_output = sorter(input_list)
    # codeflash_output is used to check that the output of the original code is the same as that of the optimized code.
    
    import pytest  # used for our unit tests
    from codeflash.bubble_sort import sorter
    
    # unit tests
    
    # Basic Functionality Tests
    def test_basic_unsorted_list():
        codeflash_output = sorter([3, 1, 2])
        codeflash_output = sorter([5, 3, 8, 6, 2])
    
    def test_basic_sorted_list():
        codeflash_output = sorter([1, 2, 3])
        codeflash_output = sorter([2, 4, 6, 8, 10])
    
    def test_basic_reverse_sorted_list():
        codeflash_output = sorter([3, 2, 1])
        codeflash_output = sorter([10, 8, 6, 4, 2])
    
    # Edge Case Tests
    def test_single_element_list():
        codeflash_output = sorter([1])
        codeflash_output = sorter([42])
    
    def test_empty_list():
        codeflash_output = sorter([])
    
    def test_all_elements_same():
        codeflash_output = sorter([2, 2, 2])
        codeflash_output = sorter([5, 5, 5, 5, 5])
    
    # Lists with Negative Numbers
    def test_mixed_positive_and_negative_numbers():
        codeflash_output = sorter([3, -1, 2, -2])
        codeflash_output = sorter([0, -3, 5, -2, 4])
    
    def test_all_negative_numbers():
        codeflash_output = sorter([-3, -1, -2])
        codeflash_output = sorter([-5, -3, -8, -6, -2])
    
    # Lists with Floating Point Numbers
    def test_mixed_integers_and_floats():
        codeflash_output = sorter([3.1, 2.2, 1.3])
        codeflash_output = sorter([5, 3.5, 8.1, 6.2, 2])
    
    def test_all_floats():
        codeflash_output = sorter([3.3, 1.1, 2.2])
        codeflash_output = sorter([5.5, 3.3, 8.8, 6.6, 2.2])
    
    # Large Scale Test Cases
    def test_large_list():
        large_list = list(range(1000, 0, -1))
        sorted_large_list = list(range(1, 1001))
        codeflash_output = sorter(large_list)
    
    def test_large_performance():
        large_list = list(range(10000, 9000, -1))
        sorted_large_list = list(range(1, 1001))
        codeflash_output = sorter(large_list)
    
    # Lists with Duplicates
    def test_list_with_duplicates():
        codeflash_output = sorter([3, 1, 2, 1])
        codeflash_output = sorter([5, 3, 8, 3, 2, 2])
    
    # Lists with Mixed Data Types (if applicable)
    def test_mixed_data_types():
        with pytest.raises(TypeError):
            sorter([3, '1', 2])
        with pytest.raises(TypeError):
            sorter(['5', 3, '8', 6, '2'])
    
    # Run the tests
    if __name__ == "__main__":
        pytest.main()
    # codeflash_output is used to check that the output of the original code is the same as that of the optimized code.

    To test or edit this optimization locally git merge codeflash/optimize-pr63-2025-03-21T20.46.01

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