Companion Annex L

Performance Benchmark Specification

This annex defines a reference methodology for measuring the operational performance of Constitutional Execution Infrastructure (CEI). The objective is to enable repeatable, implementation-independent benchmarking using consistent workloads and metrics.

1. Benchmark Objectives

Measure governance decision latency.
Evaluate throughput under sustained load.
Assess replay performance.
Measure projection rebuild efficiency.
Evaluate scalability characteristics.

2. Benchmark Categories

Category	Description
Decision Latency	Time from request admission to governance decision.
Ledger Write	Time required to persist immutable events.
Replay	Events reconstructed per second.
Projection Rebuild	Time to regenerate read models.
API Throughput	Governed requests processed per second.

3. Representative Metrics

Metric	Unit
Average Decision Latency	Milliseconds
P95 Decision Latency	Milliseconds
Replay Rate	Events/Second
Projection Rate	Events/Second
Throughput	Requests/Second

4. Test Environment

Client Load Generator
          │
          ▼
API Gateway
          │
Governance Runtime
          │
Immutable Ledger
      ┌───┴────┐
      ▼        ▼
 Replay    Projection

5. Benchmark Principles

Use deterministic workloads where practical.
Document hardware and software configuration.
Separate warm-up from measured execution.
Report averages together with percentile metrics.
Publish benchmark methodology alongside results.

6. Reporting

Benchmark reports should include workload description, configuration, software version, policy version, observed metrics, and any assumptions or limitations affecting interpretation.

Conclusion

This annex establishes a common framework for comparing CEI implementations while encouraging transparent and reproducible performance reporting.

Next: Companion Annex M — Security Threat Model & Attack Scenarios.

Engineering Evidence

Evidence and verification layer

This document forms part of the CEI publication record. Supporting evidence is organized through the engineering-evidence archive, specifications, architecture documentation and replay verification materials.

Evidence methodology Repository landscape CEI specification Replay verification Architecture map

Document: CEI_Companion_Annex_L_Performance_Benchmark_Specification.html
Edition: First Public Edition
Version: 1.1