04
Demo 04 — Project Leyden AOT Cache
Quarkus 3.33.1 / JDK 25 LTS
⏱ ~12 min
JDK 25
Run this demo
View source on GitHub ↗
cd quarkus-demo-04-leyden
chmod +x demo.sh
./demo.shVerified result: 609ms → 148ms (−75%) startup on JDK 25 LTS. Caches parsed + linked classes AND JIT method profiles. First requests after startup get near-peak JIT performance.
Configuration
# application.properties
quarkus.package.jar.aot.enabled=true
# Quarkus automatically switches to aot-jar packaging
mvn verify # runs @QuarkusIntegrationTest → writes app.aot
Three-stage Dockerfile
| Stage | Image | Purpose |
|---|---|---|
| compiler | maven:3.9-eclipse-temurin-25 |
Build JAR |
| trainer | ubi9/openjdk-25 |
Run integration tests → create app.aot |
| runtime | ubi9/openjdk-25-runtime |
Copy JAR + app.aot |
JVM fingerprint must match between trainer and runtime.
Common pitfalls
@QuarkusIntegrationTestnot@QuarkusTest— only integration tests train the cachemvn verifynotmvn package— failsafe plugin only fires in verify phase- Don’t add
-XX:AOTCacheto Dockerfile — Quarkus sets it automatically