Loïc Mathieu
@loicmathieu.fr
Lead Developer @kestra.io, Java & JVM passionate, performance, OSS contributor (mainly Quarkus), Book Author (Quarkus edition ENI), GCP Google Dev Expert.
Like to learn stuff and share what I learned.
https://www.loicmathieu.fr
Like to learn stuff and share what I learned.
https://www.loicmathieu.fr
Pinned
Loïc Mathieu
@loicmathieu.fr
· Jul 4
Java 25: what’s new? | Loic's Blog
Now that Java 25 is features complete (Rampdown Phase One at the day of writing), it’s time to walk through all the functionalities that bring to us, developers, this new version. This article is part...
www.loicmathieu.fr
What's new in Java 25 for us, developers?
(Both in English and French)
#java #java25
www.loicmathieu.fr/wordpress/in...
(Both in English and French)
#java #java25
www.loicmathieu.fr/wordpress/in...
Reposted by Loïc Mathieu
"Mini-LSM--Build a simple key-value storage engine in a week"
This looks like a great learning resource for folks looking to get started with log-structured merge trees in #Rust 🦀, by Alex Chi Z.
👉 skyzh.github.io/mini-lsm/
This looks like a great learning resource for folks looking to get started with log-structured merge trees in #Rust 🦀, by Alex Chi Z.
👉 skyzh.github.io/mini-lsm/
December 4, 2025 at 2:14 PM
"Mini-LSM--Build a simple key-value storage engine in a week"
This looks like a great learning resource for folks looking to get started with log-structured merge trees in #Rust 🦀, by Alex Chi Z.
👉 skyzh.github.io/mini-lsm/
This looks like a great learning resource for folks looking to get started with log-structured merge trees in #Rust 🦀, by Alex Chi Z.
👉 skyzh.github.io/mini-lsm/
Reposted by Loïc Mathieu
Et si vous pouviez contribuer au programme Devoxx 2026 ? 👀
Rejoignez les ✨ Community Reviewers ✨ pour évaluer les propositions soumises, et aider à identifier les tendances émergentes !
Pour participer, inscrivez-vous via ce formulaire ⭢ docs.google.com/forms/d/e/1F...
À très vite 👋
Rejoignez les ✨ Community Reviewers ✨ pour évaluer les propositions soumises, et aider à identifier les tendances émergentes !
Pour participer, inscrivez-vous via ce formulaire ⭢ docs.google.com/forms/d/e/1F...
À très vite 👋
December 4, 2025 at 9:09 AM
Et si vous pouviez contribuer au programme Devoxx 2026 ? 👀
Rejoignez les ✨ Community Reviewers ✨ pour évaluer les propositions soumises, et aider à identifier les tendances émergentes !
Pour participer, inscrivez-vous via ce formulaire ⭢ docs.google.com/forms/d/e/1F...
À très vite 👋
Rejoignez les ✨ Community Reviewers ✨ pour évaluer les propositions soumises, et aider à identifier les tendances émergentes !
Pour participer, inscrivez-vous via ce formulaire ⭢ docs.google.com/forms/d/e/1F...
À très vite 👋
Reposted by Loïc Mathieu
Discover the exciting features of Java 25 in this comprehensive overview by @loicmathieu.fr! Set the pace and adapt to change more easily with #Java25. Check it out here: foojay.io/today/java-2...
🚀 #Foojay #JavaUpdate #DeveloperTools
🚀 #Foojay #JavaUpdate #DeveloperTools
Java 25: What's New?
foojay is the place for all OpenJDK Update Release Information. Learn More.
foojay.io
December 3, 2025 at 1:30 PM
Discover the exciting features of Java 25 in this comprehensive overview by @loicmathieu.fr! Set the pace and adapt to change more easily with #Java25. Check it out here: foojay.io/today/java-2...
🚀 #Foojay #JavaUpdate #DeveloperTools
🚀 #Foojay #JavaUpdate #DeveloperTools
Reposted by Loïc Mathieu
Bonjour, pour rappel, l'ouverture des partenariats se fait aujourd'hui à 14h ! Rendez vous sur notre site partenaire.devlille.fr pour faire votre demande !
Si vous souhaitez plus d'informations, n'hésitez pas à aller voir notre site ou à nous envoyer un mail à [email protected] !
Si vous souhaitez plus d'informations, n'hésitez pas à aller voir notre site ou à nous envoyer un mail à [email protected] !
December 1, 2025 at 9:33 AM
Bonjour, pour rappel, l'ouverture des partenariats se fait aujourd'hui à 14h ! Rendez vous sur notre site partenaire.devlille.fr pour faire votre demande !
Si vous souhaitez plus d'informations, n'hésitez pas à aller voir notre site ou à nous envoyer un mail à [email protected] !
Si vous souhaitez plus d'informations, n'hésitez pas à aller voir notre site ou à nous envoyer un mail à [email protected] !
Reposted by Loïc Mathieu
🤔 Have you ever wondered how #kubernetes caches #etcd?
✍️ I just published a new deep-dive into K8s watch cache: per-resource Cachers, waitUntilFreshAndBlock(), and progress notifications for quiet resources.
pierrezemb.fr/posts/diving...
✍️ I just published a new deep-dive into K8s watch cache: per-resource Cachers, waitUntilFreshAndBlock(), and progress notifications for quiet resources.
pierrezemb.fr/posts/diving...
Diving into Kubernetes' Watch Cache
Understanding how Kubernetes apiserver caches etcd, the 3-second timeout, and K8s 1.34 consistent read feature
pierrezemb.fr
November 12, 2025 at 8:13 AM
🤔 Have you ever wondered how #kubernetes caches #etcd?
✍️ I just published a new deep-dive into K8s watch cache: per-resource Cachers, waitUntilFreshAndBlock(), and progress notifications for quiet resources.
pierrezemb.fr/posts/diving...
✍️ I just published a new deep-dive into K8s watch cache: per-resource Cachers, waitUntilFreshAndBlock(), and progress notifications for quiet resources.
pierrezemb.fr/posts/diving...
Reposted by Loïc Mathieu
ELT or ETL?
ETL transforms before loading, so what lands is already clean and compliant. ELT loads raw first, then transforms in the warehouse, which is faster and more flexible at cloud scale.
Kestra orchestrates either way: youtu.be/VxOmetLBTxE
ETL transforms before loading, so what lands is already clean and compliant. ELT loads raw first, then transforms in the warehouse, which is faster and more flexible at cloud scale.
Kestra orchestrates either way: youtu.be/VxOmetLBTxE
ETL vs ELT: What's The Difference?
YouTube video by Kestra
youtu.be
November 27, 2025 at 4:23 PM
ELT or ETL?
ETL transforms before loading, so what lands is already clean and compliant. ELT loads raw first, then transforms in the warehouse, which is faster and more flexible at cloud scale.
Kestra orchestrates either way: youtu.be/VxOmetLBTxE
ETL transforms before loading, so what lands is already clean and compliant. ELT loads raw first, then transforms in the warehouse, which is faster and more flexible at cloud scale.
Kestra orchestrates either way: youtu.be/VxOmetLBTxE
Reposted by Loïc Mathieu
New Token-Oriented Object Notation (#TOON) Hopes to Cut #LLM #Costs by Reducing Token Consumption
https://www.infoq.com/ne...
https://www.infoq.com/ne...
November 27, 2025 at 5:30 PM
New Token-Oriented Object Notation (#TOON) Hopes to Cut #LLM #Costs by Reducing Token Consumption
https://www.infoq.com/ne...
https://www.infoq.com/ne...
Reposted by Loïc Mathieu
Explore the Art of Performance Tuning! Learn how saving in the #cloud is pointless if your code isn't optimized, from Daniel Witkowski, who highlights that an efficient cloud means nothing if you're wasting code 1000× more.
#CodeEffeciency #PerformanceTuning
foojay.io/today/the-ar...
#CodeEffeciency #PerformanceTuning
foojay.io/today/the-ar...
The Art of Performance Tuning: Why Saving 30% in the Cloud Means Nothing if Your Code Wastes 1000× More
foojay is the place for all OpenJDK Update Release Information. Learn More.
foojay.io
November 28, 2025 at 9:45 AM
Explore the Art of Performance Tuning! Learn how saving in the #cloud is pointless if your code isn't optimized, from Daniel Witkowski, who highlights that an efficient cloud means nothing if you're wasting code 1000× more.
#CodeEffeciency #PerformanceTuning
foojay.io/today/the-ar...
#CodeEffeciency #PerformanceTuning
foojay.io/today/the-ar...
TIL that you can create indices concurrently in Postgres using `CREATE INDEX CONCURRENTLY ` and in MySQL with `ALGORITHM=INPLACE, LOCK=NONE`.
This is tremendously convenient when you use automatic migration on multi-hundred GB tables that happen at startup and don't want this startup to take hours!
This is tremendously convenient when you use automatic migration on multi-hundred GB tables that happen at startup and don't want this startup to take hours!
November 28, 2025 at 8:51 AM
TIL that you can create indices concurrently in Postgres using `CREATE INDEX CONCURRENTLY ` and in MySQL with `ALGORITHM=INPLACE, LOCK=NONE`.
This is tremendously convenient when you use automatic migration on multi-hundred GB tables that happen at startup and don't want this startup to take hours!
This is tremendously convenient when you use automatic migration on multi-hundred GB tables that happen at startup and don't want this startup to take hours!
Reposted by Loïc Mathieu
📝 Blogged: "On Idempotency Keys"
Discussing several options for ensuring exactly-once processing in distributed systems using idempotency keys, from UUIDs to monotonically increasing sequences.
👉 www.morling.dev/blog/on-idem...
Discussing several options for ensuring exactly-once processing in distributed systems using idempotency keys, from UUIDs to monotonically increasing sequences.
👉 www.morling.dev/blog/on-idem...
November 25, 2025 at 4:38 PM
📝 Blogged: "On Idempotency Keys"
Discussing several options for ensuring exactly-once processing in distributed systems using idempotency keys, from UUIDs to monotonically increasing sequences.
👉 www.morling.dev/blog/on-idem...
Discussing several options for ensuring exactly-once processing in distributed systems using idempotency keys, from UUIDs to monotonically increasing sequences.
👉 www.morling.dev/blog/on-idem...
Reposted by Loïc Mathieu
[𝗣𝗔𝗥𝗧𝗘𝗡𝗔𝗥𝗜𝗔𝗧] L’un des principaux freins à l’IA reste le coût.
Clever Cloud s’associe à SpiNNcloud pour une plateforme IA européenne plus performante et plus économe, grâce aux serveurs SpiNNaker2 (jusqu’à 17× moins énergivores).
Tous les détails : www.clever.cloud/fr/blog/pres...
Clever Cloud s’associe à SpiNNcloud pour une plateforme IA européenne plus performante et plus économe, grâce aux serveurs SpiNNaker2 (jusqu’à 17× moins énergivores).
Tous les détails : www.clever.cloud/fr/blog/pres...
SpiNNcloud et Clever Cloud unissent leurs forces pour une plateforme européenne de calcul pour l’IA | Clever Cloud
Partenariat Clever Cloud SpiNNcloud pour une infrastructure IA européenne, économe en énergie et indépendante des fournisseurs non européens.
www.clever.cloud
November 25, 2025 at 1:35 PM
[𝗣𝗔𝗥𝗧𝗘𝗡𝗔𝗥𝗜𝗔𝗧] L’un des principaux freins à l’IA reste le coût.
Clever Cloud s’associe à SpiNNcloud pour une plateforme IA européenne plus performante et plus économe, grâce aux serveurs SpiNNaker2 (jusqu’à 17× moins énergivores).
Tous les détails : www.clever.cloud/fr/blog/pres...
Clever Cloud s’associe à SpiNNcloud pour une plateforme IA européenne plus performante et plus économe, grâce aux serveurs SpiNNaker2 (jusqu’à 17× moins énergivores).
Tous les détails : www.clever.cloud/fr/blog/pres...
Reposted by Loïc Mathieu
A theme that really stood out at @gradle.com's DPE Summit conference is that while developers feel productive using GenAI for coding, this isn't necessarily translating into more features/fixes/customer value for organisations. So I wrote a blog post about it
gradle.com/blog/develop...
gradle.com/blog/develop...
The developer productivity paradox: Why faster coding doesn’t mean faster software delivery
Developers are using Generative AI to crank out code faster than ever before, but somehow, the metrics aren’t showing an overall productivity improvement. So what’s going on?
gradle.com
November 24, 2025 at 11:57 AM
A theme that really stood out at @gradle.com's DPE Summit conference is that while developers feel productive using GenAI for coding, this isn't necessarily translating into more features/fixes/customer value for organisations. So I wrote a blog post about it
gradle.com/blog/develop...
gradle.com/blog/develop...
Reposted by Loïc Mathieu
🎉 We're very happy to announce our new release KeePassXC 2.7.11 and... *drumroll* that the KeePassXC version 2.7.9 has been awarded a CSPN Security Visa by the French National Cybersecurity Agency (ANSSI). 🎉❤️
See our blog post for more information: keepassxc.org/blog/2025-11... #VisaSecu #KeePassXC
See our blog post for more information: keepassxc.org/blog/2025-11... #VisaSecu #KeePassXC
November 24, 2025 at 12:39 AM
🎉 We're very happy to announce our new release KeePassXC 2.7.11 and... *drumroll* that the KeePassXC version 2.7.9 has been awarded a CSPN Security Visa by the French National Cybersecurity Agency (ANSSI). 🎉❤️
See our blog post for more information: keepassxc.org/blog/2025-11... #VisaSecu #KeePassXC
See our blog post for more information: keepassxc.org/blog/2025-11... #VisaSecu #KeePassXC
Reposted by Loïc Mathieu
Le Call for Papers (CFP) pour Devoxx France 2026 est ouvert ! 🙌
⏰ Clôture : 11 janvier 2026 à 23h59 (CET)
👉 Soumettez votre talk sur devoxxfr2026.cfp.dev
Nous avons hâte de découvrir vos idées 💡
⏰ Clôture : 11 janvier 2026 à 23h59 (CET)
👉 Soumettez votre talk sur devoxxfr2026.cfp.dev
Nous avons hâte de découvrir vos idées 💡
November 24, 2025 at 10:23 AM
Le Call for Papers (CFP) pour Devoxx France 2026 est ouvert ! 🙌
⏰ Clôture : 11 janvier 2026 à 23h59 (CET)
👉 Soumettez votre talk sur devoxxfr2026.cfp.dev
Nous avons hâte de découvrir vos idées 💡
⏰ Clôture : 11 janvier 2026 à 23h59 (CET)
👉 Soumettez votre talk sur devoxxfr2026.cfp.dev
Nous avons hâte de découvrir vos idées 💡
Ravi (et un peu fière) d'avoir contribué un article sur les nouveautés de Java 25 (comme tout les 6 mois maintenant)
Programmez! 272 est sorti : Rust, Java 25, datacenter, programmation de jeux, RISC-V,Python, sécurité, choisir la bonne solution de développement multiplateforme
www.programmez.com/magazine-pap...
www.programmez.com/magazine-pap...
November 21, 2025 at 3:31 PM
Ravi (et un peu fière) d'avoir contribué un article sur les nouveautés de Java 25 (comme tout les 6 mois maintenant)
Reposted by Loïc Mathieu
📝 Blogged: "Building a Durable Execution Engine With SQLite"
Exploring the fundamentals of DE, based on a minimal engine built from scratch, using #SQLite as an execution log, and modern #Java (👋 virtual threads).
👉https://www.morling.dev/blog/building-durable-execution-engine-with-sqlite/
Exploring the fundamentals of DE, based on a minimal engine built from scratch, using #SQLite as an execution log, and modern #Java (👋 virtual threads).
👉https://www.morling.dev/blog/building-durable-execution-engine-with-sqlite/
November 20, 2025 at 2:12 PM
Reposted by Loïc Mathieu
SaaS is convenient, but control is non-negotiable. 🛡️
We built Kestra to run anywhere, Cloud, On-Prem, or Air-gapped, because we believe you should own your Orchestrator, not just rent it.
The future of tooling is about sovereignty and choice.
platformengineering.com/features/ret...
We built Kestra to run anywhere, Cloud, On-Prem, or Air-gapped, because we believe you should own your Orchestrator, not just rent it.
The future of tooling is about sovereignty and choice.
platformengineering.com/features/ret...
The Return of On-Premises Tooling in the SaaS & Platform Era - Platform Engineering
Enterprises are returning to on-premises tooling for greater control, sovereignty, and performance in the cloud era.
platformengineering.com
November 20, 2025 at 3:54 PM
SaaS is convenient, but control is non-negotiable. 🛡️
We built Kestra to run anywhere, Cloud, On-Prem, or Air-gapped, because we believe you should own your Orchestrator, not just rent it.
The future of tooling is about sovereignty and choice.
platformengineering.com/features/ret...
We built Kestra to run anywhere, Cloud, On-Prem, or Air-gapped, because we believe you should own your Orchestrator, not just rent it.
The future of tooling is about sovereignty and choice.
platformengineering.com/features/ret...
Reposted by Loïc Mathieu
In this week's blog post, I'll showcase how the meta-agent hot-patches the JVM to record the byte-code transformations of native Java agents: mostlynerdless.de/blog/2025/11...
Who instruments the native instrumenters? - Mostly nerdless
In this weeks blog post, I'll show-case how the meta-agent hot-patches the JVM to record the byte-code transformations of native Java agents
mostlynerdless.de
November 20, 2025 at 8:46 AM
In this week's blog post, I'll showcase how the meta-agent hot-patches the JVM to record the byte-code transformations of native Java agents: mostlynerdless.de/blog/2025/11...
Reposted by Loïc Mathieu
Gemini 3 is now available for developers ✨
Combined with its advanced understanding of the real world, Gemini 3 Pro is our most intelligent model for building complex apps.
goo.gle/43ADuV6
Combined with its advanced understanding of the real world, Gemini 3 Pro is our most intelligent model for building complex apps.
goo.gle/43ADuV6
Start building with Gemini 3
Gemini 3 is introducing advanced agentic coding capabilities, plus Google Antigravity, a new agentic development platform.
goo.gle
November 18, 2025 at 4:22 PM
Gemini 3 is now available for developers ✨
Combined with its advanced understanding of the real world, Gemini 3 Pro is our most intelligent model for building complex apps.
goo.gle/43ADuV6
Combined with its advanced understanding of the real world, Gemini 3 Pro is our most intelligent model for building complex apps.
goo.gle/43ADuV6
Reposted by Loïc Mathieu
A deep dive into Apache Kafka's KRaft protocol
developers.redhat.com/articles/202... - Good article from Federico Valeri
developers.redhat.com/articles/202... - Good article from Federico Valeri
A deep dive into Apache Kafka's KRaft protocol | Red Hat Developer
Learn about the Apache Kafka's KRaft protocol, a consensus algorithm that ensures fault tolerance and consistency in a network of interconnected nodes
developers.redhat.com
November 18, 2025 at 4:27 PM
A deep dive into Apache Kafka's KRaft protocol
developers.redhat.com/articles/202... - Good article from Federico Valeri
developers.redhat.com/articles/202... - Good article from Federico Valeri
Reposted by Loïc Mathieu
Episode 332 - Groquik revient, Emmanuel s'en va #Java #Spring #Quarkus #Infinispan #Gemini #Javelit #développement #IA #modèles #outils #productivité #NTP #JVM #RedHat sur www.youtube.com/watch?v=QZSm... et en podcast lescastcodeurs.com/2025/11/18/l...
www.youtube.com
November 18, 2025 at 10:24 AM
Episode 332 - Groquik revient, Emmanuel s'en va #Java #Spring #Quarkus #Infinispan #Gemini #Javelit #développement #IA #modèles #outils #productivité #NTP #JVM #RedHat sur www.youtube.com/watch?v=QZSm... et en podcast lescastcodeurs.com/2025/11/18/l...
Reposted by Loïc Mathieu
LangChain4j's Planner interface enables users to design & integrate custom agentic patterns allowing for the creation of sophisticated, purpose-driven agentic systems.
Learn more in Mario Fusco's blog post: "Agentic AI Patterns: one size does not fit all"
quarkus.io/blog/agentic...
Learn more in Mario Fusco's blog post: "Agentic AI Patterns: one size does not fit all"
quarkus.io/blog/agentic...
November 18, 2025 at 2:03 PM
LangChain4j's Planner interface enables users to design & integrate custom agentic patterns allowing for the creation of sophisticated, purpose-driven agentic systems.
Learn more in Mario Fusco's blog post: "Agentic AI Patterns: one size does not fit all"
quarkus.io/blog/agentic...
Learn more in Mario Fusco's blog post: "Agentic AI Patterns: one size does not fit all"
quarkus.io/blog/agentic...
Reposted by Loïc Mathieu
Help--my LocalDate isn’t flattened! Just before my Valhalla talk at JFall, I found out that the early access build can flatten LocalDate arrays, but the latest version from Github cannot. Why? Serialization, of course. Read the gory details at https://horstmann.com/un...
November 10, 2025 at 6:52 AM
Help--my LocalDate isn’t flattened! Just before my Valhalla talk at JFall, I found out that the early access build can flatten LocalDate arrays, but the latest version from Github cannot. Why? Serialization, of course. Read the gory details at https://horstmann.com/un...
Reposted by Loïc Mathieu
With our Mail Trigger, you can automate workflows the moment an email arrives, react to alerts, batch summaries, turn customer emails into tickets, or let AI highlight what matters.
quick demo: youtu.be/Kz1w40TbNjQ
quick demo: youtu.be/Kz1w40TbNjQ
Stop Managing Email: Let AI Agents Make Decisions For You
YouTube video by Kestra
youtu.be
November 17, 2025 at 3:48 PM
With our Mail Trigger, you can automate workflows the moment an email arrives, react to alerts, batch summaries, turn customer emails into tickets, or let AI highlight what matters.
quick demo: youtu.be/Kz1w40TbNjQ
quick demo: youtu.be/Kz1w40TbNjQ
Reposted by Loïc Mathieu
⏰ Plus que 10 jours avant l'ouverture du CFP Devoxx 2026 !
Hier : visio du comité de sélection ✅
On est à FOND pour vous préparer une édition 2026 de folie ! 🔥
🎟️ Places dispo : reg.devoxx.fr
Prêts à soumettre vos talks ?
Hier : visio du comité de sélection ✅
On est à FOND pour vous préparer une édition 2026 de folie ! 🔥
🎟️ Places dispo : reg.devoxx.fr
Prêts à soumettre vos talks ?
November 14, 2025 at 3:56 PM
⏰ Plus que 10 jours avant l'ouverture du CFP Devoxx 2026 !
Hier : visio du comité de sélection ✅
On est à FOND pour vous préparer une édition 2026 de folie ! 🔥
🎟️ Places dispo : reg.devoxx.fr
Prêts à soumettre vos talks ?
Hier : visio du comité de sélection ✅
On est à FOND pour vous préparer une édition 2026 de folie ! 🔥
🎟️ Places dispo : reg.devoxx.fr
Prêts à soumettre vos talks ?