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Faster CPython Benchmark Infrastructure

πŸ”’ ▢️ START A BENCHMARK RUN

Results

Here are some recent and important revisions. πŸ‘‰ Complete list of results.

Most recent pystats on main (5ec4bf8)

linux x86_64 (linux)

date fork/ref hash/flags vs. 3.12.6: vs. 3.13.0rc2: vs. base:
2025-02-24 python/cd6abe27a2582786da7b cd6abe2 1.132x ↑
πŸ“„πŸ“ˆ
1.090x ↑
πŸ“„πŸ“ˆ
2025-02-24 python/cd6abe27a2582786da7b cd6abe2 (NOGIL) 1.003x ↑
πŸ“„πŸ“ˆ
1.035x ↓
πŸ“„πŸ“ˆ
1.113x ↓
πŸ“„πŸ“ˆπŸ§ 
2025-02-22 python/5ec4bf86b7f4455432ae 5ec4bf8 1.139x ↑
πŸ“„πŸ“ˆ
1.097x ↑
πŸ“„πŸ“ˆ
2025-02-22 python/5ec4bf86b7f4455432ae 5ec4bf8 (NOGIL) 1.026x ↑
πŸ“„πŸ“ˆ
1.012x ↓
πŸ“„πŸ“ˆ
1.102x ↓
πŸ“„πŸ“ˆπŸ§ 
2025-02-21 python/38642bff139bde5c0118 38642bf 1.064x ↑
πŸ“„πŸ“ˆ
1.017x ↑
πŸ“„πŸ“ˆ
2025-02-21 python/38642bff139bde5c0118 38642bf (NOGIL) 1.056x ↓
πŸ“„πŸ“ˆ
1.089x ↓
πŸ“„πŸ“ˆ
1.103x ↓
πŸ“„πŸ“ˆπŸ§ 
2025-02-20 python/d63af9540f6163104699 d63af95 (NOGIL) 1.007x ↓
πŸ“„πŸ“ˆ
1.043x ↓
πŸ“„πŸ“ˆ
1.109x ↓
πŸ“„πŸ“ˆπŸ§ 
2025-02-20 python/d63af9540f6163104699 d63af95 1.117x ↑
πŸ“„πŸ“ˆ
1.073x ↑
πŸ“„πŸ“ˆ

linux x86_64 (vultr)

date fork/ref hash/flags vs. 3.12.6: vs. 3.13.0rc2: vs. base:
2025-02-24 python/cd6abe27a2582786da7b cd6abe2 1.088x ↑
πŸ“„πŸ“ˆ
1.048x ↑
πŸ“„πŸ“ˆ
2025-02-24 python/cd6abe27a2582786da7b cd6abe2 (NOGIL) 1.045x ↓
πŸ“„πŸ“ˆ
1.077x ↓
πŸ“„πŸ“ˆ
1.123x ↓
πŸ“„πŸ“ˆπŸ§ 
2025-02-22 python/5ec4bf86b7f4455432ae 5ec4bf8 1.090x ↑
πŸ“„πŸ“ˆ
1.050x ↑
πŸ“„πŸ“ˆ
2025-02-22 python/5ec4bf86b7f4455432ae 5ec4bf8 (NOGIL) 1.044x ↓
πŸ“„πŸ“ˆ
1.076x ↓
πŸ“„πŸ“ˆ
1.124x ↓
πŸ“„πŸ“ˆπŸ§ 
2025-02-21 mpage/load_fast_borrow_abs 1382cfc (NOGIL) 1.012x ↑
πŸ“„πŸ“ˆ
1.021x ↓
πŸ“„πŸ“ˆ
1.053x ↑
πŸ“„πŸ“ˆπŸ§ 
2025-02-21 python/38642bff139bde5c0118 38642bf 1.089x ↑
πŸ“„πŸ“ˆ
1.048x ↑
πŸ“„πŸ“ˆ
2025-02-21 python/38642bff139bde5c0118 38642bf (NOGIL) 1.039x ↓
πŸ“„πŸ“ˆ
1.071x ↓
πŸ“„πŸ“ˆ
1.118x ↓
πŸ“„πŸ“ˆπŸ§ 
2025-02-21 mpage/load_fast_borrow_abs 1998b35 (NOGIL) 1.002x ↑
πŸ“„πŸ“ˆ
1.031x ↓
πŸ“„πŸ“ˆ
1.043x ↑
πŸ“„πŸ“ˆπŸ§ 
2025-02-20 python/d63af9540f6163104699 d63af95 (NOGIL) 1.040x ↓
πŸ“„πŸ“ˆ
1.072x ↓
πŸ“„πŸ“ˆ
1.123x ↓
πŸ“„πŸ“ˆπŸ§ 
2025-02-20 python/d63af9540f6163104699 d63af95 1.093x ↑
πŸ“„πŸ“ˆ
1.053x ↑
πŸ“„πŸ“ˆ
2025-02-20 DinoV/local_type_cache 15d5533 (NOGIL) 1.042x ↓
πŸ“„πŸ“ˆ
1.074x ↓
πŸ“„πŸ“ˆ
1.000x ↑
πŸ“„πŸ“ˆπŸ§ 
2025-02-20 DinoV/local_type_cache e71a0e9 (NOGIL) 1.048x ↓
πŸ“„πŸ“ˆ
1.080x ↓
πŸ“„πŸ“ˆ
1.007x ↓
πŸ“„πŸ“ˆπŸ§ 
2025-02-20 python/6c450f44c283c61d0e1a 6c450f4 (NOGIL) 1.040x ↓
πŸ“„πŸ“ˆ
1.072x ↓
πŸ“„πŸ“ˆ

* indicates that the exact same versions of pyperformance was not used.

Longitudinal speed improvement

Improvement of the geometric mean of key merged benchmarks, computed with pyperf compare. The results have a resolution of 0.01 (1%).

Configuration speed improvement

Documentation

Running benchmarks from the GitHub web UI

Visit the πŸ”’ benchmark action and click the "Run Workflow" button.

The available parameters are:

  • fork: The fork of CPython to benchmark. If benchmarking a pull request, this would normally be your GitHub username.
  • ref: The branch, tag or commit SHA to benchmark. If a SHA, it must be the full SHA, since finding it by a prefix is not supported.
  • machine: The machine to run on. One of linux-amd64 (default), windows-amd64, darwin-arm64 or all.
  • benchmark_base: If checked, the base of the selected branch will also be benchmarked. The base is determined by running git merge-base upstream/main $ref.
  • pystats: If checked, collect the pystats from running the benchmarks.

To watch the progress of the benchmark, select it from the πŸ”’ benchmark action page. It may be canceled from there as well. To show only your benchmark workflows, select your GitHub ID from the "Actor" dropdown.

When the benchmarking is complete, the results are published to this repository and will appear in the complete table. Each set of benchmarks will have:

  • The raw .json results from pyperformance.
  • Comparisons against important reference releases, as well as the merge base of the branch if benchmark_base was selected. These include
    • A markdown table produced by pyperf compare_to.
    • A set of "violin" plots showing the distribution of results for each benchmark.

The most convenient way to get results locally is to clone this repo and git pull from it.

Running benchmarks from the GitHub CLI

To automate benchmarking runs, it may be more convenient to use the GitHub CLI. Once you have gh installed and configured, you can run benchmarks by cloning this repository and then from inside it:

gh workflow run benchmark.yml -f fork=me -f ref=my_branch

Any of the parameters described above are available at the commandline using the -f key=value syntax.

Collecting Linux perf profiling data

To collect Linux perf sampling profile data for a benchmarking run, run the _benchmark action and check the perf checkbox. Follow this by a run of the _generate action to regenerate the plots.

License

This repo is licensed under the BSD 3-Clause License, as found in the LICENSE file.

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Benchmark results for free-threaded builds of Python

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