# Performance Review Report

**Branch**: chore/v060-tech-debt -> main
**Date**: 2026-03-20
**Commits**: 5 (8f77d44, 7254a63, 4ec4e3d, 056bac9, c1c2861)

## Issues in Your Changes (BLOCKING)

### CRITICAL

No critical performance issues found.

### HIGH

No high-severity performance issues found.

## Issues in Code You Touched (Should Fix)

No should-fix performance issues found in adjacent code.

## Pre-existing Issues (Not Blocking)

No pre-existing performance issues worth flagging in reviewed files.

## Suggestions (Lower Confidence)

- **Sequential schedule processing in tick loop** - `src/services/schedule-executor.ts:281` (Confidence: 65%) -- The `for` loop processes due schedules sequentially with `await this.executeSchedule(schedule, now)`. If many schedules are due simultaneously, they are processed one-at-a-time. However, this is likely intentional to avoid thundering herd effects on SQLite, and the FAIL policy path now uses a synchronous transaction which cannot be parallelized anyway. Low real-world impact since tick intervals are 60s and schedule counts are expected to be small.

- **clearRunningScheduleByTask linear scan** - `src/services/schedule-executor.ts:159` (Confidence: 60%) -- `clearRunningScheduleByTask` iterates all entries in `runningSchedules` Map to find a matching taskId. A reverse lookup Map (taskId -> scheduleId) would make this O(1). However, the Map size is bounded by active schedule count, which is expected to be small, making this a micro-optimization.

## Summary

| Category | CRITICAL | HIGH | MEDIUM | LOW |
|----------|----------|------|--------|-----|
| Blocking | 0 | 0 | 0 | 0 |
| Should Fix | 0 | 0 | 0 | 0 |
| Pre-existing | 0 | 0 | 0 | 0 |

**Performance Score**: 9/10
**Recommendation**: APPROVED

## Analysis Notes

This PR contains three tech debt changes. All three are performance-neutral or performance-positive:

### 1. OutputRepository interface move (#101)
Pure refactor -- moves the `OutputRepository` interface from `src/implementations/output-repository.ts` to `src/core/interfaces.ts`. Zero runtime impact. Import paths change but no behavior or allocation changes.

### 2. BootstrapMode enum replacing boolean flags (#104)
Replaces three separate boolean flags (`skipResourceMonitoring`, `skipScheduleExecutor`, `skipRecovery`) with a single `BootstrapMode` enum (`'server' | 'cli' | 'run'`). The derived boolean values are computed once at the top of `bootstrap()` via simple comparisons. Eliminates the dead-code `getConfig()` function which called `loadConfiguration()` a second time (though it was never invoked, so no actual runtime improvement). Net performance impact: zero -- same branching logic, slightly cleaner code.

### 3. ScheduleExecutor FAIL policy transaction wrapping (#83)
Converts two sequential async operations (`scheduleRepo.update()` + `scheduleRepo.recordExecution()`) into a single synchronous SQLite transaction via `database.runInTransaction()`. This is a **positive performance change**:
- Reduces two separate SQLite write operations (each with implicit transaction overhead) to one explicit transaction with two statements
- Eliminates an async boundary between the update and the execution recording
- better-sqlite3 synchronous transactions are faster than two separate async-wrapped statements
- Atomicity guarantee is the primary motivation, but the performance side effect is beneficial
