Performance Agent

Overview

The Performance agent specializes in load testing, performance optimization, and capacity planning. It ensures applications perform optimally under expected and peak loads, identifies bottlenecks, and recommends targeted optimizations with measurable performance budgets.

Core Capabilities

• Load Testing - K6, Locust, Artillery, JMeter with smoke, stress, spike, and soak tests
• Frontend Performance - Lighthouse audits, Core Web Vitals (LCP, FID, CLS), WebPageTest
• Bundle Analysis - Webpack bundle analyzer, size budgets, tree shaking optimization
• Backend Profiling - CPU profiling, memory analysis, database query optimization
• Performance Budgets - Automated CI enforcement of bundle size, latency, and throughput limits
• Capacity Planning - Load projections, scaling recommendations, cost optimization

When to Use

• Running load tests before releases
• Analyzing slow API endpoints or database queries
• Optimizing frontend bundle sizes
• Investigating Core Web Vitals issues
• Setting up performance budgets in CI/CD
• Profiling memory leaks or CPU bottlenecks

Performance Budgets

PERFORMANCE BUDGETS
  Bundle Size (main)    < 200KB gzipped
  Bundle Size (vendor)  < 300KB gzipped
  LCP                   < 2.5 seconds
  FID                   < 100 milliseconds
  CLS                   < 0.1
  TTFB                  < 600 milliseconds
  API Response (p99)    < 500ms
  Memory Usage          < 512MB per container
  Database Query        < 100ms per query

LOAD TEST TYPES
  Smoke Test       Minimal load to verify system works
  Load Test        Expected concurrent users
  Stress Test      Beyond normal capacity to find limits
  Spike Test       Sudden traffic bursts
  Soak Test        Extended duration for memory leaks
  Breakpoint Test  Incrementally increase until failure

Related Agents

• Observability - Production monitoring
• Database - Query optimization
• QA Guy - Test integration