ci: run tests in parallel with pytest-xdist#10
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Add pytest-xdist to the dev group and enable parallel test execution. - Local default: `-n auto --dist worksteal` in pytest.ini, so `pytest` fans out across all cores (worksteal rebalances the heavy Water-sweep and fuzz tests). Full suite ~76s -> ~51s locally. - CI: `-n 2` overrides the auto default. GitHub runners have 4 vCPUs and some tests spawn smoothify's own worker pool, so a smaller fan-out avoids oversubscribing the runner. - README: note the parallel default and `-n 0` to serialise for debugging. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Summary
Enable parallel test execution with
pytest-xdist— parallel by default locally, capped at-n 2in CI.pyproject.toml— addpytest-xdist>=3.8.0to the dev group.pytest.ini— local default-n auto --dist worksteal: fans out across all cores, andworkstealrebalances the heavy Water-sweep / fuzz tests so one worker doesn't get stuck with them. Full suite ~76s → ~51s locally.ci.yml) — both test steps pass-n 2, overriding the auto default. GitHub runners have 4 vCPUs and several tests spawn smoothify's own worker pool (num_cores=2/0), so a smaller fan-out avoids oversubscribing the runner.-n 0to serialise for debugging.Verification
-n 2→ override honored (2 workers).-n 2→ 4 notebooks pass.uv.lockis gitignored, so CI resolvespytest-xdistfresh frompyproject.toml.🤖 Generated with Claude Code