Step up the performance game with Spring Boot and Project Leyden
summary
Fat uber‑jar Spring Boot apps start around 3–5s on a stock JVM; unpacking and using CDS cuts that to roughly 1.5–1.8s and shrinks RSS from ~392MB to ~317MB (~19%); JDK 24’s AOT cache further trims startup to ~1.37s and pairing with Spring AOT reaches ~2.2s in another measurement; Project Leyden’s profiling+code compilation (training run required) produces subsecond startups and up to ~4x speedups. Prerequisites: identical JVM, flat classpath, preserved timestamps, and a training run using spring.context.exit=onRefresh and self-extract jar.
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chapters (16)
- 0:00Performance optimization with Spring Boot
- 0:45Runtime efficiency costs
- 2:12CDS AOT cache and Project Leyden
- 5:26Class Data Sharing setup
- 7:10CDS training and deployment demo
- 9:59CDS startup and memory benchmark
- 13:08Spring AOT optimizations
- 17:05CDS in Cloud Native Build Packs
- 19:39AOT cache vs CDS
- 21:52JVM AOT cache demo
- 25:48Leyden profiling and compilation
- 28:40Leyden load-based training demo
- 34:06Project Leyden performance gains
- 35:52CRaC vs AOT cache comparison
- 41:30Trade-offs and approach selection
- 43:13Q&A
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