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@mdboom mdboom commented Jun 20, 2025

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@mdboom mdboom requested a review from Copilot June 20, 2025 14:40
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Pull Request Overview

This PR ensures that no warmup iterations run when collecting pystats in the benchmark script and documents that change.

  • Added a flag to disable warmups for pystats runs.
  • Updated the changelog with the new behavior.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File Description
bench_runner/scripts/run_benchmarks.py Added --warmups 0 to extra_args to disable warmup iterations.
CHANGELOG.md Documented the “No warmups on pystats runs” change under Bugfixes.
Comments suppressed due to low confidence (1)

CHANGELOG.md:7

  • [nitpick] The phrasing is a bit awkward; consider rewording to something like: "To avoid missing statistics during warmup runs, warmups are disabled when collecting pystats."
To prevent "missing" some stats collected during warmup runs, they are now

os.environ[LOOPS_FILE_ENV_VAR] = "loops.json"

extra_args = ["--hook", "pystats"]
extra_args = ["--hook", "pystats", "--warmups", "0"]
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[nitpick] The literal "0" here is a magic value; consider defining a named constant (e.g., WARMUPS_DISABLED) or using a configuration variable for clarity and easier updates.

Suggested change
extra_args = ["--hook", "pystats", "--warmups", "0"]
extra_args = ["--hook", "pystats", "--warmups", WARMUPS_DISABLED]

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@mdboom mdboom merged commit 78665ab into faster-cpython:main Jun 20, 2025
5 of 6 checks passed
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