Spring Boot Tutorial 0/110 lessons ~6 min read Lesson 89
Performance Engineering
Performance engineering is a discipline: define SLOs, measure under load, fix the hottest path, repeat.
Course progress0%
Focus
2 guided sections
Practice signal
Examples included
Career prep
Foundation builder
Introduction
Performance engineering is a discipline: define SLOs, measure under load, fix the hottest path, repeat. Tools: JMH for micro-benchmarks, k6/Gatling for load tests, JFR/async-profiler for production profiling.
Best practices
- Define SLOs (e.g. p95 < 200ms, error rate < 0.1%) before optimising.
- Load test in a prod-shaped staging — small datasets lie.
- Profile under real traffic with async-profiler; don't guess.
- Adopt virtual threads for I/O-bound web apps on Java 21+.
Ready to mark this lesson complete?Track your journey across the entire course.