Cache Node.__hash__ from the immutable nodeid#5
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__hash__ is hot during collection (reordering, set/dict membership); nodeid never changes after construction. Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
Node.__hash__at construction from the immutable_nodeid.Timing (pytest's own
testing/suite)Warm interleaved A/B
pytest testing/ --collect-only -q(12 pairs, alternate order).mainCollected 4286 tests each run.
Note: this suite is only ~4k tests / ~0.5–1.5s collect, so single micro-optimizations are often within run-to-run noise. Larger synthetic suites show clearer wins.
Test plan