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perf(physics): reuse reset-complete transition scratch

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Mirror retail's ten-deep LIFO transition lifetime, retain all query scratch with complete reset contracts, and remove Tier-0 enum boxing without changing collision decisions. Fresh and retained engines are bit-identical across the expanded oracle, while measured transition profiles now allocate 0 bytes per resolve.
This commit is contained in:
Erik 2026-07-25 14:37:02 +02:00
parent 2effba5127
commit 16d182c2f0
19 changed files with 3037 additions and 1228 deletions
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18
docs/plans/2026-07-24-modern-runtime-architecture.md
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@ -2,8 +2,8 @@
**Date:** 2026-07-24
**Status:** Slices A–H and I0 are complete. Slices F–L were explicitly
approved 2026-07-24; Slice I1 is active.
**Status:** Slices A–H and I0–I1 are complete. Slices F–L were explicitly
approved 2026-07-24; Slice I2 is active.
**Scope:** Reconcile and sequence the existing Modern Pipeline (`MP`) and
Linux/headless (`LH`) tracks using the 2026-07-24 connected performance audit.
@ -1193,12 +1193,16 @@ seven-checkpoint lifecycle/reconnect gate pass with graceful shutdown.
The final ordinary-production minute on exact `14fbe92b` sustained 519.7 FPS:
CPU p50/p95/p99 1.869/2.306/2.484 ms and GPU
1.096/1.108/1.136 ms. Working/private memory was 652.1/928.3 MiB.
Frame-thread allocation is now 22.34 KiB median; allocation-tick evidence and
the four-mover baseline assign that remainder primarily to reset-complete
`Transition` collision/query scratch. I0 has pinned the retail oracle and
fixtures, so I1 is the current execution point. Evidence:
Frame-thread allocation at the G5 checkpoint was 22.34 KiB median. I1 has now
replaced fresh per-resolve transition graphs and query temporaries with
reset-complete retained scratch: player, remote, projectile, camera, and
grounded walkable-publication profiles each measure 0 B/resolve, while
fresh-vs-reused output and body state remain bit-identical. I2 immutable flat
collision assets are the current execution point. Evidence:
[`../research/2026-07-25-slice-g5-production-profile.md`](../research/2026-07-25-slice-g5-production-profile.md)
and
[`../research/2026-07-25-slice-i1-transition-scratch.md`](../research/2026-07-25-slice-i1-transition-scratch.md)
and
[`2026-07-25-modern-runtime-slice-i.md`](2026-07-25-modern-runtime-slice-i.md).
The intended order is therefore:
@ -1212,7 +1216,7 @@ honest metrics + committed baselines (A — exit criteria block C)
-> incremental render scene (F)
-> delta GPU submission (G)
-> residual frame cleanup (H-a, H-b, H-c)
-> flat collision assets (I — CURRENT at I1)
-> flat collision assets (I — CURRENT at I2)
-> presentation-independent runtime (J — §0.3 authorization)
-> Linux/headless/multi-session (K)
-> evidence-gated GPU jobs (L)