mew

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A tool for microbenchmarking Python code, powered by Google Benchmark.

import mew


@mew.benchmark
def bench_sorted(state: mew.State) -> None:
    data = list(range(1000, 0, -1))
    for _ in state:
        sorted(data)

$ mew run
mew · host=laptop cpus=10 @ 3200MHz scaling=enabled
Benchmark                              │     Iters │       Real │        CPU
────────────────────────────────────────────────────────────────────────────
benchmarks/bench_sort.py::bench_sorted │ 1,000,000 │   32.10 ns │   32.05 ns
  • Decorate: @mew.benchmark, @mew.parametrize, @mew.product register one benchmark or a benchmark family.
  • Run: mew run discovers bench_*.py files, streams results to a formatted table, JSON, or a JSONL archive.
  • Profiling: mew run --sample (in-process pyinstrument) and --profile-memory (memray allocations) in the same run; mew profile for native C frames via xctrace / py-spy / perf.
  • Compare: mew compare head.json baseline.json --regression-threshold 5% --exit-non-zero-on-regression for CI jobs.

Installation

$ uv add mew-bench                 # or: pip install mew-bench
$ uv add 'mew-bench[cpu,memory]'   # opt-in profilers

Requires Python 3.11+. A pre-built wheel is installed where available; otherwise the C++ extension is compiled via CMake + nanobind.

Docs

License

This project is licensed under the Apache-2.0 license.

Project links

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Latest release

1 maintainer

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Avatar for njunge from gravatar.com njunge

Credits

Author: Nicholas Junge

GitHub Statistics

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The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License expression

Apache-2.0
View SPDX License List

Requires

Python >=3.11

Provides Extra

cpu memory

Tags

benchmarking microbenchmark performance profiling

Classifiers

Report project as malware

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Publisher: release.yml on nicholasjng/mew

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