Optimization Documentation Index

This directory contains comprehensive optimization analysis for the oh-my-opencode-slim project.

📚 Documents

1. OPTIMIZATION_REPORT.md - Complete Analysis

Size: ~22KB | Read Time: 15-20 minutes

Comprehensive optimization report with 20+ identified opportunities organized by priority:

🔴 P0 - Critical: 3 issues (memory leaks, resource exhaustion, blocking I/O)
🟡 P1 - High Priority: 8 optimizations (performance gains, caching)
🟢 P2 - Medium Priority: 6 improvements (connection pooling, config merging)
🔵 P3 - Low Priority: 7 enhancements (code quality, micro-optimizations)

Key Highlights:

Memory leak in BackgroundTaskManager
LSP client pool without eviction
Synchronous file I/O blocking startup
Inefficient permission generation (O(n²))
Missing cache for agent prompts

Expected Impact: 30-50% memory reduction, 40-60% faster initialization

2. QUICK_WINS.md - Actionable Changes

Size: ~8KB | Read Time: 5 minutes

10 quick optimizations that can be implemented in ~90 minutes total:

Memory Cleanup (15 min) 🔴 - Prevent task accumulation
Prompt Caching (10 min) 🟡 - Eliminate repeated disk I/O
LSP Pool Limit (10 min) 🔴 - Prevent unbounded growth
Log Level Control (20 min) 🟡 - Reduce log spam
Message Extraction (15 min) 🟡 - Optimize hot path
RegExp Pre-compilation (5 min) 🔵 - Micro-optimization
Update Rate Limiting (10 min) 🟡 - Reduce network calls
Build Minification (2 min) 🔵 - Smaller bundle
Node Version (2 min) 🔵 - Runtime consistency
Performance Timing (15 min) 🟢 - Visibility into bottlenecks

Implementation Priority:

Week 1: Critical fixes (memory, resources)
Week 2: High priority (caching, logging)
Week 3+: Polish and monitoring

3. ARCHITECTURE_NOTES.md - Design Insights

Size: ~16KB | Read Time: 10 minutes

Architectural analysis and recommendations:

Current Strengths:

✅ Clean module separation
✅ Strong type safety with TypeScript + Zod
✅ Excellent test coverage (269 tests)
✅ Well-designed plugin architecture

Improvement Areas:

Resource lifecycle management
Circuit breakers for external services
Retry logic with exponential backoff
Event bus for decoupled communication
Health check system

Design Patterns:

Factory Pattern ⭐⭐⭐⭐⭐
Singleton Pattern ⭐⭐⭐⭐
Observer Pattern ⭐⭐⭐⭐⭐
Strategy Pattern ⭐⭐⭐⭐
Builder Pattern ⭐⭐⭐⭐⭐

Recommended Additions:

Object Pool for LSP clients
TTL Cache for configs/prompts
Lazy initialization for optional features
Metrics collection system
Circuit breaker pattern

🎯 Where to Start

For Immediate Impact

Start with: QUICK_WINS.md

Implement the P0 and P1 optimizations from the quick wins document. These provide immediate value with minimal time investment.

Priority order:

Fix memory leak in BackgroundTaskManager (15 min) - Critical
Add LSP connection pool limit (10 min) - Critical
Add prompt caching (10 min) - High impact
Add log level control (20 min) - Quality of life

Total time: ~55 minutes for the most critical fixes

For Deep Understanding

Start with: ARCHITECTURE_NOTES.md

Read the architectural analysis to understand:

Current design patterns and their effectiveness
Recommended architectural patterns (Circuit Breaker, Event Bus, etc.)
Performance architecture patterns (Object Pool, TTL Cache)
Monitoring and observability strategy

Then reference OPTIMIZATION_REPORT.md for detailed implementation guidance.

For Comprehensive Planning

Start with: OPTIMIZATION_REPORT.md

Use this for:

Sprint planning (organized by priority and estimated impact)
Technical debt tracking
Performance budgeting
Team coordination on optimization efforts

📊 Codebase Overview

Language: TypeScript
Runtime: Bun
Framework: OpenCode Plugin API
Build Tool: Bun + TypeScript

Total Lines: 12,065
Source Files: 69 (non-test)
Test Files: 23 (269 tests)
Test Time: 3.24s

Largest Files:

src/background/background-manager.ts (496 LOC)
src/tools/lsp/client.ts (446 LOC)
src/cli/install.ts (401 LOC)
src/utils/tmux.ts (354 LOC)
src/tools/lsp/utils.ts (327 LOC)

🔍 Key Findings Summary

Critical Issues (P0)

Issue	Impact	Effort	File
Memory leak in task manager	High	15 min	background-manager.ts
Unbounded LSP pool growth	High	10 min	lsp/client.ts
Blocking file I/O	Medium	30 min	config/loader.ts

High-Impact Optimizations (P1)

Optimization	Benefit	Effort	File
Cache agent prompts	Eliminate disk I/O	10 min	config/loader.ts
Optimize permission gen	10-50x faster	20 min	index.ts
Message extraction	30-50% faster	15 min	background-manager.ts
Log level control	10-20% faster	20 min	utils/logger.ts

Quick Wins

Total time investment: 90 minutes
Expected improvements:
- 30-50% reduction in memory usage
- 40-60% faster plugin initialization
- 20-30% faster runtime performance
- Elimination of production crashes

🚀 Testing After Changes

# Run all tests
bun test

# Type checking
bun run typecheck

# Lint and format
bun run check

# Build
bun run build

# Development mode
bun run dev

📈 Performance Testing

Recommended Benchmarks

Plugin Initialization
- Target: < 100ms
- Measure: performance.now() around plugin load
Background Task Launch
- Target: < 50ms (fire-and-forget)
- Measure: Time to return task ID
LSP Operations
- Target: < 500ms for goto-definition
- Target: < 1s for find-references
Config Loading
- Target: < 20ms
- Measure: Time from file read to parsed config

Load Testing Scenarios

100 Concurrent Background Tasks
- Should queue properly
- Memory should stay bounded
- No process crashes
10 Simultaneous LSP Clients
- Pool should limit to max size
- Idle clients should be evicted
- No zombie processes
24-Hour Soak Test
- Memory should remain stable
- No resource leaks
- All cleanup timers should fire

🛠️ Tools & Commands

Performance Profiling

# Bun built-in profiler
bun --profile ./dist/index.js

# CPU profiling
bun --cpu-profile ./dist/index.js

Memory Analysis

# Heap snapshot
bun --heap-snapshot ./dist/index.js

# Memory usage
bun --expose-gc ./dist/index.js

Bundle Analysis

# Analyze bundle size
bun build src/index.ts --outfile dist/index.js --analyze

📝 Change Log Template

When implementing optimizations, use this template:

## [Version] - YYYY-MM-DD

### Performance
- Fixed memory leak in BackgroundTaskManager (P0)
- Added LSP connection pool limits (P0)
- Implemented prompt caching (P1)

### Improvements
- Added log level control
- Optimized message extraction
- Pre-compiled RegExp patterns

### Metrics
- Plugin initialization: 250ms → 100ms (60% faster)
- Memory usage (24h): 450MB → 180MB (60% reduction)
- Background task launch: 45ms → 15ms (67% faster)

🤝 Contributing

When adding new optimizations:

Document the issue - What's slow and why
Measure before - Baseline metrics
Implement fix - Code changes
Measure after - Performance improvement
Add tests - Prevent regression
Update docs - Keep this current

📞 Questions?

For questions about these optimizations:

Open an issue on GitHub
Reference the specific document and section
Include performance measurements if available

Last Updated: January 29, 2026
Next Review: After implementing P0 and P1 optimizations

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