Phase 04 Plan 01: Metrics and Benchmark Summary

Metrics calculation with SearchResult/BenchmarkResults dataclasses, accuracy functions, cost tracking, and batch benchmark CLI runner

Performance

• Duration: 4 min
• Started: 2026-02-20T13:24:58Z
• Completed: 2026-02-20T13:29:43Z
• Tasks: 3
• Files modified: 5

Accomplishments

• SearchResult and BenchmarkResults dataclasses for structured evaluation data
• Exact match accuracy calculation with account normalization (handles string/float conversion)
• Top-K accuracy for embedding models with configurable K values
• Latency statistics including mean, median, p95 percentiles
• Cost tracking per model with real API pricing (Gemini Flash, Google/Jina embeddings, local MiniLM)
• Batch benchmark runner with warmup queries and rate limit protection
• CLI script for quick testing and full benchmark runs

Task Commits

Each task was committed atomically:

1. Task 1: Create metrics module with dataclass structures and accuracy calculations - bc0e2106 (feat)
2. Task 2: Create batch benchmark runner with test set iteration - db54cb27 (feat)
3. Task 3: Verify benchmark execution with small sample - 33bcf15b (feat)

Files Created/Modified

• src/evaluation/metrics.py - SearchResult, BenchmarkResults dataclasses, accuracy and latency calculations
• src/evaluation/cost_tracker.py - PRICING dict and calculate_cost function for API cost estimates
• src/evaluation/benchmark.py - measure_latency, fetch_test_queries, run_single_query, run_benchmark
• src/evaluation/run_benchmark.py - CLI script with argparse for --limit, --k, --full options
• src/evaluation/__init__.py - Updated exports for new modules

Decisions Made

• Normalize account values by stripping decimal parts (e.g., "6801.0" -> "6801") for accurate comparison
• NULL == NULL counts as correct match for cost_center field
• Split embedding model timing equally since search_all_models executes them together
• 2 warmup queries per benchmark to avoid cold start timing bias
• 0.1s delay between queries for rate limit protection

Deviations from Plan

None - plan executed exactly as written.

Issues Encountered

None - all verifications passed on first attempt.

User Setup Required

None - no external service configuration required.

Next Phase Readiness

• Benchmark infrastructure complete and verified with 5-query test run
• Ready for full benchmark execution and dashboard development in 04-02
• 3648 test query variations available for comprehensive evaluation

Phase: 04-evaluation-dashboard Completed: 2026-02-20

Self-Check: PASSED

All files and commits verified:

• FOUND: src/evaluation/metrics.py
• FOUND: src/evaluation/cost_tracker.py
• FOUND: src/evaluation/benchmark.py
• FOUND: src/evaluation/run_benchmark.py
• FOUND: bc0e2106 (Task 1)
• FOUND: db54cb27 (Task 2)
• FOUND: 33bcf15b (Task 3)