Phase 4: Local Benchmarking & Metrics

[sharfuddin18]

Phase 4 — Local Benchmarking & Metrics

Purpose

This PR proposes merging:

phase-4-local-benchmarking-metrics

into:

main

This is a Phase 4 validation PR intended to verify that the completed Phase 4 implementation integrates cleanly with the current main branch and that the repository's CI/CD, build, test, security, and deployment automation remains healthy.

Phase 4 Scope

Phase 4 introduces the local benchmarking and metrics infrastructure for comparing:

Raw Ollama baseline
vs.
Codemaster RAG

using:

• TTFT
• TPS
• Context Retrieval Precision
• Per-case benchmark results
• Aggregate metrics
• Raw-vs-RAG paired comparison

Implemented

• Reusable Phase 4 benchmark harness
• Four repository-aware benchmark cases
• Raw Ollama baseline execution path
• Codemaster RAG execution path using the existing Phase 3 hybrid retriever
• Stream-based TTFT measurement
• Ollama metadata-based TPS calculation
• Context Retrieval Precision
• Precision regression tests
• Benchmark result persistence/reload
• Atomic benchmark-result persistence
• Aggregation and median/average metrics
• Raw-vs-RAG paired comparison
• Controlled Ollama/retrieval/metric failure handling
• Phase 4 benchmark documentation
• Benchmark-result directory protection in .gitignore

Important Precision Correction

The final implementation defines Context Retrieval Precision as:

relevant retrieved sources / all retrieved sources

Equivalent to:

len(expected ∩ retrieved) / len(retrieved)

Regression coverage includes:

• partial precision → 1/3
• perfect precision → 1.0
• zero precision → 0.0
• empty retrieval
• empty expected-source set

This prevents the previously identified recall-like calculation from returning an incorrect precision value.

Verification Performed

The Phase 4 branch has undergone a dedicated read-only final audit.

The audit found no unresolved Phase 4 implementation correctness issue.

Verified areas include:

• benchmark harness
• repository-aware cases
• Raw Ollama path
• existing Phase 3 RAG path
• TTFT implementation
• TPS implementation
• retrieval precision
• precision regression tests
• persistence
• aggregation
• paired comparison
• failure handling
• documentation
• branch isolation
• main protection

CI/CD Integration Verification

This PR is intentionally being opened so GitHub can independently evaluate the actual merge candidate through the repository's configured automation.

Please verify all applicable:

• GitHub Actions workflows
• unit/integration tests
• build checks
• lint/static analysis
• dependency validation
• security checks
• CodeQL/security automation
• package/build workflows
• deployment/release-related checks, if triggered by this PR

Do not treat "Able to merge" alone as evidence that CI/CD is healthy.

Live Benchmark Status

A live Ollama benchmark has not been represented as completed.

No fabricated TTFT, TPS, retrieval-precision, or Raw-vs-RAG performance numbers are included in this PR.

The live benchmark remains environment-dependent and should only be reported after genuine Ollama execution.

Merge Safety

This PR is based on the Phase 4 branch:

phase-4-local-benchmarking-metrics

The intended target is:

main

No Phase 4 changes should be merged unless the required automated checks pass.

Review Request

Please use this PR to verify whether Phase 4 can safely integrate with main.

In particular, confirm:

1. All required CI checks pass.
2. Existing repository tests remain healthy.
3. Build/package validation passes.
4. Static/security checks pass.
5. No Phase 4 change introduces a regression.
6. Existing automation remains compatible with the Phase 4 branch.
7. No deployment/release workflow is negatively affected.

Decision

If all required checks pass:

Phase 4 is ready for merge into main.

If any check fails:

Do not merge. Investigate the failure first.