Exact (tier E): the same observations in the same order, the same verdicts.
- The judged observations are compacted in fixed blocks (count, prefix, fill) instead of a
serial push_back.
- Both sorts (by d, by reflection) sort (key, index) records, so a comparison reads the two
elements it compares instead of two observations elsewhere in memory; same total order.
- Each reflection is decided on its own observations, so the reflections go side by side in
claimed blocks; the rejection count is an integer sum.
Measured (prototype, GPU): Wilson test 8tyy 3.4 -> 3.0 s, 8a1a 2.8 -> 2.6 s per run (the
sort-on-records part is not in the measured binary yet); md5 identical.
Clean branch rebuilt from scratch (GPU and CPU) and re-verified: p.mtz md5 identical to production on myob/cytc/thau/8a1a/8tyy/8qaw/9gdj (GPU), cytc -N 4, myob/cytc and myob -N 4 (CPU).
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SVmAWnzCmRKAXVUCdc4iNi
leonarski_fandClaude Opus 5.5
70859bcb60