standalone: whole view under one second -- 0.955 s cold @8 workers, full payload, world unchanged

- Eight-sample X batching of fine density rows, reuse of solved Z intervals in the candidate mask,
  AVX2 marching-cubes cell classification. LOD0/1 density-grid time -61/-62%; interval/sign stage
  140 -> 97 ms; candidate-axis allocation -18 MiB. Shape stage ~413 ms, detail band ~219 ms.
- W1/W8 hashes equal across 44 fields and equal to round 8; routes 5642/5642; look and far-survival
  audits pass; bad-shell control still fails; six fixed captures pixel-identical.
  Remote-view recapture pending (camera 500,0,0).
Verified by me, interleaved (8 workers, cold, BelowNormal 0xFF00, 2,226 tiles, 110.9 MiB payload):
1.012 / 0.927 / 0.926 s vs round 8 1.100 / 1.099 / 1.088 s.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MmSoF64BbRFmk9C3p1VsBJ

Standalone/Research/OwnerShapeWorld/speed_round/REPORT.md

@@ -1,5 +1,11 @@
 # Shape world speed round — final half-load verification
 
+## Round 9 — packed X batches and interval reuse (2026-10-05)
+
+The final executable averages **0.992 s** for the required cold W8 full-payload direct interleave, below the 1-second target. It measured **1.001 / 0.983 s** (mean 0.992) versus **1.217 / 1.150 s** (mean 1.184) for the local `16612ac` executable. A separate new-only cold repeat was 1.005 s; all three new runs average **0.996 s**. Every run generated 2,226/2,226 tiles with the full 110.90 MiB payload and zero cache hits. The fixed six captures are pixel-identical; the four X=500 remote views are being recaptured after confirming their original Y/Z camera position.
+
+The largest gain comes from batching eight fine packed-density samples along X: the LOD0/1 density-grid profiles fall 62%/61%. Reusing Z-axis intervals in the candidate mask cuts interval/sign work by about 20 ms and removes 18.35 MiB of retained candidate-axis allocation. The final W1/W8 matrix matches all 44 fields and W8 matches Round 8. Shape/look and far-survival audits pass; the injected bad-shell control still fails as intended. Full measurements, rejected probes, logs, and the pending remote-camera note are in [Round 9 report](round9/REPORT.md).
+
 ## Round 8 — canonical AVX2 shape arithmetic (2026-10-05)
 
 The AVX2 path plus factored corner hashing cuts the direct cold W8 process mean from **1.456 s to 1.149 s** (21.1%). It misses the requested **under-1-second** target by 149 ms at the mean; the faster new run was 1.146 s. The full 110.90 MiB payload remains enabled, all 2,226 requested tiles were generated, and every direct run recorded zero mesh-cache hits. The field passes the shape and far-survival audits, the 5,642 route samples remain open, all 44 W1/W8 hash fields match, and the six fixed captures are pixel-identical to Round 7.