⚡️ Speed up function get_binary_stdin by 14%

[codeflash-ai]

📄 14% (0.14x) speedup for get_binary_stdin in src/click/_compat.py

⏱️ Runtime : 39.7 microseconds → 34.8 microseconds (best of 172 runs)

📝 Explanation and details

To optimize the given program, we can make a few changes. The original program is already efficient, but there are some minor improvements that can be made, such as removing unnecessary type casting and minimizing function calls.

Here is the optimized version of the program.

Changes Made.

1. if _is_binary_reader(stream, False) directly returns the stream without casting since it's known to be binary.
2. Removed unnecessary t.cast(t.BinaryIO, stream) since the type is already correctly inferred.
3. Combined type check and error handling in _is_binary_reader to ensure streamlined logic.
4. Ensured backward compatibility while avoiding redundant checks.

This maintains the original intent and logic of the code but with slight performance improvements.

✅ Correctness verification report:

Test	Status
⚙️ Existing Unit Tests	🔘 None Found
🌀 Generated Regression Tests	✅ 26 Passed
⏪ Replay Tests	🔘 None Found
🔎 Concolic Coverage Tests	🔘 None Found
📊 Tests Coverage	100.0%

🌀 Generated Regression Tests Details

from __future__ import annotations

import sys
import typing as t
from io import BytesIO, StringIO

# imports
import pytest  # used for our unit tests
from src.click._compat import get_binary_stdin


def _is_binary_reader(stream: t.IO[t.Any], closed: bool) -> bool:
    return isinstance(stream, BytesIO)
from src.click._compat import get_binary_stdin

# unit tests

def test_standard_input_as_text_stream(monkeypatch):
    # Mock sys.stdin as a text stream
    mock_stdin = StringIO("text input")
    monkeypatch.setattr(sys, 'stdin', mock_stdin)
    
    with pytest.raises(RuntimeError):
        get_binary_stdin()

def test_standard_input_as_binary_stream(monkeypatch):
    # Mock sys.stdin as a binary stream
    mock_stdin = BytesIO(b"binary input")
    monkeypatch.setattr(sys, 'stdin', mock_stdin)
    
    codeflash_output = get_binary_stdin()

def test_standard_input_with_buffer_attribute(monkeypatch):
    # Mock sys.stdin as a text stream with a buffer attribute
    class MockTextStreamWithBuffer:
        def __init__(self):
            self.buffer = BytesIO(b"binary buffer")
    
    mock_stdin = MockTextStreamWithBuffer()
    monkeypatch.setattr(sys, 'stdin', mock_stdin)
    
    codeflash_output = get_binary_stdin()

def test_standard_input_without_buffer_attribute(monkeypatch):
    # Mock sys.stdin as a text stream without a buffer attribute
    class MockTextStreamWithoutBuffer:
        pass
    
    mock_stdin = MockTextStreamWithoutBuffer()
    monkeypatch.setattr(sys, 'stdin', mock_stdin)
    
    with pytest.raises(RuntimeError):
        get_binary_stdin()

def test_closed_standard_input_stream(monkeypatch):
    # Mock sys.stdin as a closed stream
    mock_stdin = BytesIO(b"binary input")
    mock_stdin.close()
    monkeypatch.setattr(sys, 'stdin', mock_stdin)
    
    with pytest.raises(RuntimeError):
        get_binary_stdin()

def test_standard_input_as_mock_stream(monkeypatch):
    # Mock sys.stdin as a mock stream that raises an exception
    class MockStream:
        def read(self):
            raise IOError("Mock error")
    
    mock_stdin = MockStream()
    monkeypatch.setattr(sys, 'stdin', mock_stdin)
    
    with pytest.raises(RuntimeError):
        get_binary_stdin()

def test_non_standard_input_stream_types(monkeypatch):
    # Mock sys.stdin as a non-standard stream type
    mock_stdin = object()
    monkeypatch.setattr(sys, 'stdin', mock_stdin)
    
    with pytest.raises(RuntimeError):
        get_binary_stdin()

def test_large_input_data(monkeypatch):
    # Mock sys.stdin with large input data
    large_data = b"a" * 1000
    mock_stdin = BytesIO(large_data)
    monkeypatch.setattr(sys, 'stdin', mock_stdin)
    
    codeflash_output = get_binary_stdin()

def test_non_readable_standard_input(monkeypatch):
    # Mock sys.stdin as a non-readable stream
    class MockNonReadableStream:
        def read(self):
            raise IOError("Stream not readable")
    
    mock_stdin = MockNonReadableStream()
    monkeypatch.setattr(sys, 'stdin', mock_stdin)
    
    with pytest.raises(RuntimeError):
        get_binary_stdin()

def test_standard_input_with_delayed_availability(monkeypatch):
    # Mock sys.stdin as a stream that becomes available after a delay
    class MockDelayedStream:
        def __init__(self):
            self.available = False
        
        def read(self):
            if not self.available:
                raise IOError("Stream not available yet")
            return b"binary input"
    
    mock_stdin = MockDelayedStream()
    monkeypatch.setattr(sys, 'stdin', mock_stdin)
    
    mock_stdin.available = True
    with pytest.raises(RuntimeError):
        get_binary_stdin()

def test_standard_input_with_special_characters(monkeypatch):
    # Mock sys.stdin with special characters
    special_data = b"\x00\x01\x02binary\x03\x04\x05"
    mock_stdin = BytesIO(special_data)
    monkeypatch.setattr(sys, 'stdin', mock_stdin)
    
    codeflash_output = get_binary_stdin()

def test_standard_input_with_different_encodings(monkeypatch):
    # Mock sys.stdin with different text encodings
    class MockEncodedStream:
        def __init__(self):
            self.buffer = BytesIO("encoded text".encode("utf-16"))
    
    mock_stdin = MockEncodedStream()
    monkeypatch.setattr(sys, 'stdin', mock_stdin)
    
    codeflash_output = get_binary_stdin()

def test_standard_input_with_side_effects(monkeypatch):
    # Mock sys.stdin and verify no side effects
    mock_stdin = BytesIO(b"binary input")
    monkeypatch.setattr(sys, 'stdin', mock_stdin)
    
    codeflash_output = get_binary_stdin()

def test_standard_input_with_non_blocking_mode(monkeypatch):
    # Mock sys.stdin in non-blocking mode
    mock_stdin = BytesIO(b"binary input")
    monkeypatch.setattr(sys, 'stdin', mock_stdin)
    
    codeflash_output = get_binary_stdin()

def test_standard_input_with_buffered_io(monkeypatch):
    # Mock sys.stdin with buffered I/O
    class MockBufferedStream:
        def __init__(self):
            self.buffer = BytesIO(b"buffered binary input")
    
    mock_stdin = MockBufferedStream()
    monkeypatch.setattr(sys, 'stdin', mock_stdin)
    
    codeflash_output = get_binary_stdin()
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.

from __future__ import annotations

import io
import sys
import typing as t

# imports
import pytest  # used for our unit tests
from src.click._compat import get_binary_stdin


def _is_binary_reader(stream: t.IO[t.Any], is_buffer: bool) -> bool:
    # Mock implementation for testing purposes
    return isinstance(stream, io.BufferedReader)
from src.click._compat import get_binary_stdin

# unit tests

def test_binary_stdin_already_binary(monkeypatch):
    # Mock sys.stdin to be a binary stream
    mock_stdin = io.BytesIO(b"binary data")
    monkeypatch.setattr(sys, 'stdin', mock_stdin)

    # Test that get_binary_stdin returns the binary stream
    codeflash_output = get_binary_stdin()

def test_binary_stdin_with_buffer(monkeypatch):
    # Mock sys.stdin to be a text stream with a binary buffer
    mock_stdin = io.TextIOWrapper(io.BytesIO(b"binary data"))
    monkeypatch.setattr(sys, 'stdin', mock_stdin)

    # Test that get_binary_stdin returns the binary buffer
    codeflash_output = get_binary_stdin()

def test_stdin_not_binary_no_buffer(monkeypatch):
    # Mock sys.stdin to be a non-binary stream with no buffer
    class CustomStream:
        def read(self):
            return "text data"
    mock_stdin = CustomStream()
    monkeypatch.setattr(sys, 'stdin', mock_stdin)

    # Test that get_binary_stdin raises RuntimeError
    with pytest.raises(RuntimeError):
        get_binary_stdin()

def test_stdin_not_binary_with_non_binary_buffer(monkeypatch):
    # Mock sys.stdin to be a text stream with a non-binary buffer
    class CustomStream:
        def __init__(self):
            self.buffer = io.StringIO("text data")
    mock_stdin = CustomStream()
    monkeypatch.setattr(sys, 'stdin', mock_stdin)

    # Test that get_binary_stdin raises RuntimeError
    with pytest.raises(RuntimeError):
        get_binary_stdin()


def test_stdin_non_standard_stream(monkeypatch):
    # Mock sys.stdin to be a non-standard stream
    class CustomStream:
        def read(self):
            return "text data"
    mock_stdin = CustomStream()
    monkeypatch.setattr(sys, 'stdin', mock_stdin)

    # Test that get_binary_stdin raises RuntimeError
    with pytest.raises(RuntimeError):
        get_binary_stdin()

def test_stdin_mocked_stream(monkeypatch):
    # Mock sys.stdin to be a mocked binary stream
    mock_stdin = io.BytesIO(b"binary data")
    monkeypatch.setattr(sys, 'stdin', mock_stdin)

    # Test that get_binary_stdin returns the binary stream
    codeflash_output = get_binary_stdin()

def test_large_scale_input(monkeypatch):
    # Mock sys.stdin to be a large binary file stream
    large_data = b"binary data" * 1000
    mock_stdin = io.BytesIO(large_data)
    monkeypatch.setattr(sys, 'stdin', mock_stdin)

    # Test that get_binary_stdin returns the large binary stream
    codeflash_output = get_binary_stdin()

def test_edge_case_buffer_is_none(monkeypatch):
    # Mock sys.stdin to have a buffer attribute that is None
    class CustomStream:
        buffer = None
    mock_stdin = CustomStream()
    monkeypatch.setattr(sys, 'stdin', mock_stdin)

    # Test that get_binary_stdin raises RuntimeError
    with pytest.raises(RuntimeError):
        get_binary_stdin()


def test_stdin_is_none(monkeypatch):
    # Mock sys.stdin to be None
    monkeypatch.setattr(sys, 'stdin', None)

    # Test that get_binary_stdin raises RuntimeError
    with pytest.raises(RuntimeError):
        get_binary_stdin()

def test_stdin_is_non_stream_type(monkeypatch):
    # Mock sys.stdin to be an integer
    monkeypatch.setattr(sys, 'stdin', 42)

    # Test that get_binary_stdin raises RuntimeError
    with pytest.raises(RuntimeError):
        get_binary_stdin()
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.

from src.click._compat import get_binary_stdin

def test_get_binary_stdin():
    assert get_binary_stdin() == <_io.BufferedReader name='<stdin>'>

📢 Feedback on this optimization?