# Link-Not-Merge VEX Bench

Measures synthetic VEX observation ingest and event emission throughput for the Link-Not-Merge program.

## Scenarios

`config.json` defines workloads with varying statement density and tenant fan-out. Metrics captured per scenario:

- Total latency (ingest + correlation) and p95/max percentiles
- Correlator-only latency and Mongo insert latency
- Observation throughput (observations/sec)
- Event emission throughput (events/sec)
- Peak managed heap allocations

## Running locally

```bash
dotnet run \
  --project src/Bench/StellaOps.Bench/LinkNotMerge.Vex/StellaOps.Bench.LinkNotMerge.Vex/StellaOps.Bench.LinkNotMerge.Vex.csproj \
  -- \
  --csv out/linknotmerge-vex-bench.csv \
  --json out/linknotmerge-vex-bench.json \
  --prometheus out/linknotmerge-vex-bench.prom
```

The benchmark exits non-zero if latency thresholds are exceeded, observation or event throughput drops below configured floors, allocations exceed the ceiling, or regression ratios breach the baseline.