JVM Iceberg - Modern Performance Edition

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" summary

Covers practical JVM tooling and concrete gains: use Java Flight Recorder + JDK Mission Control for continuous low‑overhead traces, async‑profiler for pinpoint CPU/allocation hotspots, VisualVM for live inspection and JMH for microbenchmarks; switching JDKs often yields measurable wins (pet‑clinic test ~9% faster, public reports 2–3.5% or even up to ~30% across major jumps, typical upgrade ~6–10%). GraalVM native images give instant startup but long builds; Project Crack / checkpoint‑restore and Project Leaden cut cold starts and restore JIT state; Project Lillipot saves ~5–15% heap. SnapStart works but needs secure‑random care.

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" chapters (11)

1. 0:00Introduction to performance
2. 1:23Overview of JVM tooling
3. 6:51Deep dive into performance tools
4. 12:18Benchmarking with JMH
5. 17:02JDK versions and migration
6. 23:22GraalVM and AOT compilation
7. 30:13Startup optimization projects
8. 39:30Virtual threads and I/O
9. 42:36Memory management optimization
10. 45:46CPU architecture and costs
11. 48:42Conclusion and summary