Anders Olsson cbf652eb1d test: assert bit-identical posteriors across RAYON_NUM_THREADS ...

tests/determinism.rs runs the same deterministic 200-event history
at thread counts {1, 2, 4, 8} via rayon::ThreadPoolBuilder::install
and asserts every (time, posterior) pair has bit-identical mu and
sigma across all configurations.

Cfg-gated to the rayon feature; no-op under --features approx alone.

Verifies the T3 determinism invariant that the ordered-reduce
strategy (per-slice parallel, sequential sum) produces thread-count-
independent results.

Part of T3.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-04-24 13:59:33 +02:00

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