fixtures: fix quadratic collection from visibility-ordered fixture lookup - #14950

Draft

RonnyPfannschmidt wants to merge 6 commits into

pytest-dev:mainfrom

RonnyPfannschmidt:exp-14942-index-fixturedefs-by-node

Commits on Aug 28, 2026

fixtures: avoid hashing Nodes when matching fixturedefs

RonnyPfannschmidt
and
Claude Opus 5 (1M context)
committed
ef8ef5d
fixtures: index fixturedefs by visibility instead of scanning

RonnyPfannschmidt
and
Claude Opus 5 (1M context)
committed
79e7b1c
fixtures: cover the whole _arg2fixturedefs mutation surface

RonnyPfannschmidt
and
Claude Opus 5 (1M context)
committed
4fa6967
fixtures: property-test the visibility index against a naive lookup

RonnyPfannschmidt
and
Claude Opus 5 (1M context)
committed
d923768
fixtures: cover legacy baseid visibility, and drop dead _matchfactories

RonnyPfannschmidt
and
Claude Opus 5 (1M context)
committed
a6479fe
fixtures: document the aliasing change and the id() workaround

RonnyPfannschmidt
and
Claude Opus 5 (1M context)
committed
9871f72