Performance Engineering

Purpose

Performance engineering encompasses load testing, profiling, and optimization to deliver reliable, scalable systems. This skill provides frameworks for choosing the right performance testing approach (load, stress, soak, spike), profiling techniques to identify bottlenecks (CPU, memory, I/O), and optimization strategies for backend APIs, databases, and frontend applications.

Use this skill to validate system capacity before launch, detect performance regressions in CI/CD pipelines, identify and resolve bottlenecks through profiling, and optimize application responsiveness across the stack.

When to Use This Skill

Common Triggers:

• "Validate API can handle expected traffic"
• "Find maximum capacity and breaking points"
• "Identify why the application is slow"
• "Detect memory leaks or resource exhaustion"
• "Optimize Core Web Vitals for SEO"
• "Set up performance testing in CI/CD"
• "Reduce cloud infrastructure costs"