# Simulation scaling baseline 03

This is the first reviewed capture of benchmark workload schema 2,
`full_fidelity_combatant_headless_arrival_v2`. Unlike baselines 01 and 02, the
fixture now gives every synthetic NPC exactly one authoritative combatant
record and rejects missing, duplicate, orphaned, or mismatched coverage. It
also exercises the current state-schema 14 conflict tick.

The machine-readable samples are in
[`simulation_scaling_baseline_03.json`](simulation_scaling_baseline_03.json).
They were captured on the same `Apple_M1_Max_64_GB` host label with Godot 4.7,
seed 8088, 10 warmup ticks, 200 measured ticks, and three samples per case.

## Results

| Case | NPCs | Seeded history | Median us/tick | Ticks/s | Simulated realtime | Arrival share | End JSON |
| --- | ---: | ---: | ---: | ---: | ---: | ---: | ---: |
| Population 6 | 6 | 0 | 114.42 | 8,740.11 | 10,488.1x | 3.4% | 0.06 MiB |
| Population 60 | 60 | 0 | 904.73 | 1,105.30 | 1,326.4x | 3.0% | 0.58 MiB |
| Population 600 | 600 | 0 | 11,033.58 | 90.63 | 108.8x | 2.8% | 5.83 MiB |
| History 600 | 60 | 600 | 992.78 | 1,007.28 | 1,208.7x | 2.8% | 0.72 MiB |
| History 6,000 | 60 | 6,000 | 1,667.58 | 599.67 | 719.6x | 1.7% | 2.06 MiB |

Every sample in every case produced the same final checksum. The 600-person
fixture sustains about 90.6 ticks per second—well above the 50-tick local
reference—while updating all 600 combatants. Indexed manager callbacks reduce
the deterministic immediate-arrival phase to 2.8% of that case; cached
combatant ID ordering separately bounds work inside the simulation phase.

## Versioning decision

Do not compare baseline-03 checksums or timings directly with baselines 01/02.
Those reports predate combat and accidentally retained only the manager's six
initial combatants after replacing the synthetic population. The workload ID
and schema are bumped so this semantic change is explicit. Baselines 01/02
remain useful historical evidence for the population-view optimization, but
baseline 03 is the valid comparison point for future full-fidelity simulation
changes.

This still excludes world scenes, rendering, navigation, and `NpcVisual`.
High/low gameplay-camera frame-time and GPU/memory captures on representative
weak hardware remain a separate presentation ledger task; the data-only result
does not claim rendered 600-NPC support.

## Capture command

```bash
/Applications/Godot.app/Contents/MacOS/Godot \
  --headless --path "$PWD" \
  --script res://tools/benchmark_simulation_scaling.gd -- \
  --host-label=Apple_M1_Max_64_GB \
  --output=res://docs/benchmarks/simulation_scaling_baseline_03.json
```