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Support configuring --num-workers with an environment variable #21395

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#21407
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Support configuring --num-workers with an environment variable#21395
#21407
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featureparallel checkingtopic-configurationConfiguration files and flags

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@ilevkivskyi
ilevkivskyi
opened on May 1, 2026

Now that we don't have best number of workers auto-detection, this may help people to e.g. set lower number of mypy workers in their CI jobs. And generally seems like a convenient thing to have. Thanks to @cdce8p for idea.

cc @JukkaL

Activity

  1. ilevkivskyi
    added
    feature
    parallel checking
    topic-configurationConfiguration files and flags
    on May 1, 2026

  2. KevinRK29 commented on May 2, 2026

    @KevinRK29
    KevinRK29
    on May 2, 2026
    Collaborator

    Is it just adding a block here to do options.num_workers = int(environ_num_workers)

  3. ilevkivskyi commented on May 2, 2026

    @ilevkivskyi
    ilevkivskyi
    on May 2, 2026
    MemberAuthor

    @KevinRK29 Essentially yes, put it around there (so that it overrides the value from config) + update the FOOTER + update the docs.

  4. ilevkivskyi
    added a commit that references this issue on May 4, 2026

    Add support for configuring `--num-workers` with a env variable (#21407)

    d091daa
  5. ilevkivskyi
    closed this as completedin #21407on May 4, 2026
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