docs/performance_guide.md

# Performance Guide

- Embedding dimension: 512 cosine-normalized vectors.
- Enable ONNX Runtime with CPU/GPU providers in air-gapped environment.
- Use TensorRT plan in GPU deployments via local `trtexec` conversion.
- Keep vector index snapshot on SSD-backed storage.
- Target p95 search latency < 150ms with warmed index and local network.