pytest-benchmark 3.0.0b1

A ``py.test`` fixture for benchmarking code.

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A py.test fixture for benchmarking code. It will group the tests into rounds that are calibrated to the chosen timer. See calibration and FAQ.

• Free software: BSD license

Installation

pip install pytest-benchmark

Documentation

pytest-benchmark.readthedocs.org

Examples

This plugin provides a benchmark fixture. This fixture is a callable object that will benchmark any function passed to it.

Example:

def something(duration=0.000001):
    # Code to be measured
    return time.sleep(duration)

def test_my_stuff(benchmark):
    # benchmark something
    result = benchmark(something)

    # Extra code, to verify that the run completed correctly.
    # Note: this code is not measured.
    assert result is None

You can also pass extra arguments:

def test_my_stuff(benchmark):
    result = benchmark(time.sleep, 0.02)

Screenshots

Normal run:

Compare mode (--benchmark-compare):

Histogram (--benchmark-histogram):

Also, it has nice tooltips.

Development

To run the all tests run:

tox

Credits

• Timing code and ideas taken from: https://bitbucket.org/haypo/misc/src/tip/python/benchmark.py

Changelog

3.0.0b1 (2015-10-13)

• Tests are sorted alphabetically in the results table.

• Failing to import statistics doesn’t create hard failures anymore. Benchmarks are automatically skipped if import failure occurs. This would happen on Python 3.2 (or earlier Python 3).

3.0.0a4 (2015-10-08)

• Changed how failures to get commit info are handled: now they are soft failures. Previously it made the whole test suite fail, just because you didn’t have git/hg installed.

3.0.0a3 (2015-10-02)

• Added progress indication when computing stats.

3.0.0a2 (2015-09-30)

• Fixed accidental output capturing caused by capturemanager misuse.

3.0.0a1 (2015-09-13)

• Added JSON report saving (the --benchmark-json command line arguments).

• Added benchmark data storage(the --benchmark-save and --benchmark-autosave command line arguments).

• Added comparison to previous runs (the --benchmark-compare command line argument).

• Added performance regression checks (the --benchmark-compare-fail command line argument).

• Added possibility to group by various parts of test name (the –benchmark-compare-group-by` command line argument).

• Added historical plotting (the --benchmark-histogram command line argument).

• Added option to fine tune the calibration (the --benchmark-calibration-precision command line argument and calibration_precision marker option).

• Changed benchmark_weave to no longer be a context manager. Cleanup is performed automatically. BACKWARDS INCOMPATIBLE

• Added benchmark.weave method (alternative to benchmark_weave fixture).

• Added new hooks to allow customization:

  • pytest_benchmark_generate_machine_info(config)

  • pytest_benchmark_update_machine_info(config, info)

  • pytest_benchmark_generate_commit_info(config)

  • pytest_benchmark_update_commit_info(config, info)

  • pytest_benchmark_group_stats(config, benchmarks, group_by)

  • pytest_benchmark_generate_json(config, benchmarks, include_data)

  • pytest_benchmark_update_json(config, benchmarks, output_json)

  • pytest_benchmark_compare_machine_info(config, benchmarksession, machine_info, compared_benchmark)

• Changed the timing code to:

  • Tracers are automatically disabled when running the test function (like coverage tracers).

  • Fixed an issue with calibration code getting stuck.

• Added pedantic mode via benchmark.pedantic(). This mode disables calibration and allows a setup function.

2.5.0 (2015-06-20)

• Improved test suite a bit (not using cram anymore).

• Improved help text on the --benchmark-warmup option.

• Made warmup_iterations available as a marker argument (eg: @pytest.mark.benchmark(warmup_iterations=1234)).

• Fixed --benchmark-verbose’s printouts to work properly with output capturing.

• Changed how warmup iterations are computed (now number of total iterations is used, instead of just the rounds).

• Fixed a bug where calibration would run forever.

• Disabled red/green coloring (it was kinda random) when there’s a single test in the results table.

2.4.1 (2015-03-16)

• Fix regression, plugin was raising ValueError: no option named 'dist' when xdist wasn’t installed.

2.4.0 (2015-03-12)

• Add a benchmark_weave experimental fixture.

• Fix internal failures when xdist plugin is active.

• Automatically disable benchmarks if xdist is active.

2.3.0 (2014-12-27)

• Moved the warmup in the calibration phase. Solves issues with benchmarking on PyPy.

  Added a --benchmark-warmup-iterations option to fine-tune that.

2.2.0 (2014-12-26)

• Make the default rounds smaller (so that variance is more accurate).

• Show the defaults in the --help section.

2.1.0 (2014-12-20)

• Simplify the calibration code so that the round is smaller.

• Add diagnostic output for calibration code (--benchmark-verbose).

2.0.0 (2014-12-19)

• Replace the context-manager based API with a simple callback interface. BACKWARDS INCOMPATIBLE

• Implement timer calibration for precise measurements.

1.0.0 (2014-12-15)

• Use a precise default timer for PyPy.

? (?)

• Readme and styling fixes (contributed by Marc Abramowitz)

• Lots of wild changes.