pytest-dev / pytest-dev/pytest-xdist

feature request: make `--dist worksteal` the default

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#1,042 3 comments 1 reaction 0 assignees View on GitHub

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Python
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Description

i have been finding that --dist worksteal is generally more performant than --dist load -- sometimes substantially. ideally, --dist worksteal should be the default, since it's simply a better algorithm. this would also address https://github.com/pytest-dev/pytest-xdist/issues/890 by making the other schedulers (loadfile, loadgroup etc) include work stealing.

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by tracing how the --dist option selects between worksteal, load, loadfile, and loadgroup. Read the related issue #890 and compare the stated scheduler behavior and performance claims. Done means the default behavior is clearly defined and the affected scheduler modes are covered consistently.

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Assessment

Tech stack
python
Domain
distributed-systems, performance, testing-qa
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
42/100

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