Performance Engineering
Performance work is not guesswork. Measure first, optimize second, then re-measure.
What to optimize
- API latency (p50, p95, p99)
- Throughput under load
- Database query performance
- Frontend page load and interaction speed
- Build and deployment times
Practical workflow
- Establish baseline metrics.
- Profile bottlenecks (CPU, memory, I/O, queries).
- Optimize one bottleneck at a time.
- Validate improvements with repeatable tests.
- Set alerts for regressions.