Sébastien Deleuze
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seb.deleuze.fr
Sébastien Deleuze
@seb.deleuze.fr
Spring @ Broadcom, #WebAssembly since 2016, ex @mixitconf.org‬ staff. https://seb.deleuze.fr
Pointe du Raz, Bretagne
September 29, 2025 at 12:19 PM
Presqu’île de Crozon, Bretagne
September 27, 2025 at 1:42 PM
Macro @ Le Puy de Sancy
August 23, 2025 at 12:46 PM
I have finished Clair Obscur: Expedition 33 main quest. It is and will probably remain the best game I have ever played. And the soundtrack is amazing. Well done @expedition33.bsky.social, kudos to the team!
August 20, 2025 at 6:15 PM
Ocean shades
July 28, 2025 at 7:55 PM
Good morning from the Luberon
July 13, 2025 at 7:53 AM
Beautiful Vercors ⛰️
May 29, 2025 at 5:38 PM
If you want to watch online and live next week (June 4) my talk "Null Safety in Spring applications with JSpecify and NullAway", make sure to register to IntelliJ IDEA Conf 2025, it is free! lp.jetbrains.com/intellij-ide...
May 28, 2025 at 1:12 PM
The source code of #Spring Petklinik, the new reference #Kotlin fullstack application I have built for my #KotlinConf and #SpringIO talks, is now available at github.com/sdeleuze/spr....

I will continue to refine it.
May 26, 2025 at 6:01 AM
@mp911.de is sharing data points about the new Spring Data AOT repositories that have been announced at @springio.net. Double the benefits of Spring AOT mode 🤩
May 23, 2025 at 8:36 AM
Today, I am presenting 2 talks at @springio.net: Null Safety in Java with JSpecify and NullAway at 9:05 (auditorium) and Next level Kotlin support in Spring Boot 4 at 17:00 (room 6). Lot of demos, don’t miss them!
May 23, 2025 at 5:54 AM
Rod Johnson sharing his love for Spring + Kotlin on #KotlinConf main stage.
May 22, 2025 at 8:38 AM
On my way to Copenhagen for @kotlinconf.com
May 21, 2025 at 8:00 AM
I spent a couple of days working on a new reference application for the talk "Next level Kotlin support in Spring Boot 4" that I will present this week at @kotlinconf.com and @springio.net. Be ready for a few surprises ...
May 20, 2025 at 10:04 AM
AOT Method Profiling JEP status has changed to candidate. openjdk.org/jeps/515

In my latest benchmark with Spring Petclinic, it allows to speedup the warmup compared to the regular JIT (red line versus blue one).

Stabilized peak performance is currently slightly lower, but hopefully will be fixed.
May 15, 2025 at 8:32 AM
Today I am at JPrime conference to present my talk about Runtime Efficiency with Spring. If you are there, don’t be shy, I am available to discuss anything Spring related!
May 14, 2025 at 8:52 AM
Les vidéos de mes 2 talks @devoxx.fr sur l’optimisation d’applications Spring Boot avec Project Leyden (youtu.be/4EAxhhSWgw4?...) et Null Safety (youtu.be/F_Qyo1cCpvY?...) viennent d’être publiées !
May 13, 2025 at 9:54 AM
Beautiful Dolomites
May 6, 2025 at 5:33 AM
Amazing game, highly recommended!
April 28, 2025 at 6:27 AM
You may have missed it, but the @graalvm.org team has recently open-sourced a variant of native image called web image, which compiles Java bytecode to WebAssembly bytecode instead of a native executable.
April 27, 2025 at 1:00 PM
Thanks for sharing. I continue to see a lower stabilized peak performance with AOT profiling and AOT profiling + code compilation with Leyden premain branch (built from last week) with Spring Petclinic. Are you aware and if yes, do you think this gap will be removed at some point?
April 22, 2025 at 1:14 PM
@garnier.wf is ready for his @devoxx.fr talk in front of a packed amphitheatre about OpenID et OAuth2 🤩
April 16, 2025 at 12:38 PM
April 6, 2025 at 10:50 AM
Probably the most impressive and exciting talk I have seen in years! Congrats to @fniephaus.com and Patrick Ziegler for their #wasmio presentation and work on @graalvm.org starting to compile Java applications to WasmGC. Kudos to @thomaswue.dev too.
March 28, 2025 at 4:13 PM
DuckDB doesn’t like foie gras. Make sense ^^. #wasmio
March 28, 2025 at 1:55 PM