Devoxx Morocco 2025 - Like Spring but faster: The new Java Jedi

Spring dominates the Java landscape, but are you aware of other similar yet different frameworks out there?

Let me show you Quarkus, the new Java Jedi. I'll expose the cape, digging into the inner workings of both Spring Boot and Quarkus, showing how the concepts and conventions familiar to Spring developers actually work. I'll show what Quarkus does with those same concepts and conventions to make it so resource efficient.

If someone asked you if you wanted to save 50% in your Java application operational costs, wouldn't you be interested? Come to this session to learn how!

Transcript

1. @edeandrea Like but faster The new Java Jedi Eric Deandrea Sr. Principal Software Engineer IBM
2. @edeandrea Who’s on Stage Today? Eric Deandrea 🤘 26+ years software development experience Java Champion 🤘 Contributor to Open Source projects Quarkus LangChain4j (& Quarkus LangChain4j) Docling-java Spring Boot, Spring Framework, Spring Security Wiremock Microcks 🤘 Boston Java Users ACM Chapter Vice Chair 🤘 Published author
3. @edeandrea • How Quarkus enables modern Java development & the Kubernetes-native experience • Introduce familiar Spring concepts, constructs, & conventions and how they map to Quarkus • Emphasis on testing patterns & practices https://red.ht/quarkus-spring-devs
4. @edeandrea It’s easier than you think! Eric Deandrea Sr. Principal Software Engineer Test-Driven Development
5. @edeandrea Eric Deandrea, IBM Java Champion | Senior Principal Software Engineer LangChain4j Deep Dive
6. @edeandrea https://youtu.be/spJwsa4KFrU RIP Java
7. @edeandrea The Warmup Issue with Java https://youtu.be/bWmuqh6wHgE (Simon Ritter - Azul Systems)
8. @edeandrea
9. @edeandrea The Quarkus Difference
10. @edeandrea Build Time Runtime Packaging (maven, etc) gradle…) Load config file from file system Parse it Classpath scanning to find annotated classes Attempt to load class to enable/disable features Build its model of the world. Start the management (thread, pool…) @ @ </> How Does a Framework Start?
11. @edeandrea The Quarkus Way Runtime Build Time @ @ </> Package model
12. @edeandrea JVM Build Time @ @ </> Package model Native The Quarkus Way enables Native Compilation
13. @edeandrea Unification of Imperative & Reactive Unification of Imperative and Reactive
14. @edeandrea 🤘Zero-config Live coding 🤘Auto-provision services 🤘Continuous testing 🤘Dev UI 🤘CLI Enhancing Developer Joy
15. @edeandrea IT’S STILL JAVA!
16. @edeandrea Is it a Jedi Mind Trick?
17. @edeandrea What’s the Secret Sauce? 🤘Don’t be dynamic Holly Cummins - https://youtu.be/vnrXXvnqriA
18. @edeandrea What’s the Secret Sauce? 🤘Don’t be dynamic 🤘Dead code elimination / inlining Holly Cummins - https://youtu.be/vnrXXvnqriA
19. @edeandrea What’s the Secret Sauce? 🤘Don’t be dynamic 🤘Dead code elimination / inlining 🤘Extensible build process so libraries can participate 🤘Jandex Indexing (offline reflection) Holly Cummins - https://youtu.be/vnrXXvnqriA
20. @edeandrea What’s the Secret Sauce? 🤘Don’t be dynamic 🤘Dead code elimination / inlining 🤘Extensible build process so libraries can participate 🤘Jandex Indexing (offline reflection) 🤘Don’t make humans tell the computer what it knows Holly Cummins - https://youtu.be/vnrXXvnqriA
21. @edeandrea What’s the Secret Sauce? 🤘Don’t be dynamic 🤘Dead code elimination / inlining 🤘Extensible build process so libraries can participate 🤘Jandex Indexing (offline reflection) 🤘Don’t make humans tell the computer what it knows 🤘Continuous profiling & shaving 🤘Be reactive without forcing humans to do reactive Holly Cummins - https://youtu.be/vnrXXvnqriA
22. @edeandrea
23. @edeandrea Jam Time! https://github.com/quarkusio/spring-quarkus-perf-comparison
24. @edeandrea JVM Native Quarkus Spring Boot Ratio (Quarkus / SB) Spring Boot (w/AOT) Ratio (Quarkus / SB AOT) Quarkus Spring Boot Ratio (Quarkus / SB) Framework version 3.29.0 3.5.7 3.5.7 3.29.0 3.5.7 Build time (s) 13.55 7.92 171.12% 11.27 120.2% 138.18 211.03 64.06% Av. RSS after startup (MB) 201.72 276.27 73.02% 262.31 76.9% 72.87 162.64 44.8% Av. time to 1st req (ms) 3,439.67 5,576.67 61.68% 5,009.67 68.66% 229.33 242.67 94.51% Av. RSS after 1st req (MB) 256.82 319.72 80.33% 303.6 84.59% 81.47 165.31 49.28% Av. throughput (req/sec) 29,666.11 7,970.79 372.19% 7,819.9 379.37% 17,122.59 6,519.28 262.65% Max throughput density (req/sec/MB) 56.24 13.29 423.24% 13.46 417.96% 70.43 18 391.24% Build RSS (GB) 6.2 7.35 84.35% Binary Size (MB) 95.38 158.38 60.22% Don’t Take My Word For It! Some real numbers (8 cores, 14GB RAM, GraalVM CE 21.0.2) https://github.com/quarkusio/benchmarks
25. @edeandrea 🤘 Spring Boot 3 application contents: ◦ 39,979 classes ◦ 85,685 fields ◦ 284,659 methods ◦ Reflection: ◦ 11,219 classes ◦ 2,132 fields ◦ 13,163 methods 🤘 Quarkus 3 application contents: ◦ 25,502 classes ◦ 49,447 fields ◦ 201,782 methods ◦ Reflection: ◦ 7,369 classes ◦ 361 fields ◦ 6,465 methods 🤘 The Quarkus application has: ◦ 14,477 (36%) less classes ◦ 36,238 (42%) less fields ◦ 82,877 (29%) less methods ◦ 3,850 (34%) less classes using reflection ◦ 1,771 (83%) less fields using reflection ◦ 6,698 (51%) less methods using reflection A Real Example https://github.com/quarkusio/benchmarks
26. @edeandrea Success Stories
27. @edeandrea Don’t Take Our Word For It! https://www.redhat.com/en/resources/etat-du-valais-customer-case-study
28. @edeandrea https://quarkus.io/blog/orange-telco-core-network-api-management-with-quarkus
29. @edeandrea https://www.youtube.com/live/YNxz3KaTz5Y
30. @edeandrea https://quarkus.io/blog/tag/user-story Don’t Take Our Word For It!
31. @edeandrea https://quarkus.io/blog/tag/user-story Don’t Take Our Word For It!
32. @edeandrea Additional Resources
33. @edeandrea https://www.redhat.com/en/resources/greener-java-applications-detail Setup 🤘 AWS (us-east-1) 🤘 SLA > 99% 🤘 800 req/sec over 20 days 🤘 50% load The Cost / Carbon Impact
34. @edeandrea https://github.com/quarkusio/quarkus-super-heroes https://quarkus.io/quarkus-workshops/super-heroes Quarkus Superheroes
35. @edeandrea Open Source Open Foundation Open Governance
36. @edeandrea
37. @edeandrea ﺷ ﻜ ﺮ ً ا ﻟ ﻚ ! Merci! Thank You! Slides Rate this talk