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
Cette semaine, j'ai testé l'outil 'mise-en-place' (MEEZ ahn plahs avec l'accent 🇬🇧), et je suis déjà conquis 🤯
Je vais pouvoir remplacer tous mes scripts custom moches que j'avais du mal à maintenir 😅
Mon avis et ce que j'ai bidouillé est à lire ici : codeka.io/2025/12/19/a...
Je vais pouvoir remplacer tous mes scripts custom moches que j'avais du mal à maintenir 😅
Mon avis et ce que j'ai bidouillé est à lire ici : codeka.io/2025/12/19/a...
Adieu `direnv`, Bonjour `mise` - Julien Wittouck
freelance solution & software architect 🏗 - containers 🐋 & linux 🐧 ❤️ - teacher & trainer 🎓 @ univ-lille.fr - speaker 🎙 - Team @Cloud_Nord
codeka.io
December 19, 2025 at 5:14 PM
Cette semaine, j'ai testé l'outil 'mise-en-place' (MEEZ ahn plahs avec l'accent 🇬🇧), et je suis déjà conquis 🤯
Je vais pouvoir remplacer tous mes scripts custom moches que j'avais du mal à maintenir 😅
Mon avis et ce que j'ai bidouillé est à lire ici : codeka.io/2025/12/19/a...
Je vais pouvoir remplacer tous mes scripts custom moches que j'avais du mal à maintenir 😅
Mon avis et ce que j'ai bidouillé est à lire ici : codeka.io/2025/12/19/a...
Reposted by Loïc Mathieu
les recherches sur le stockage éternel sur du verre se multiplient
www.programmez.com/actualites/l...
www.programmez.com/actualites/l...
Le stockage sur verre : l'ultime matériel pour un stockage éternel ?
Microsoft avait dévoilé en 2022 le projet Silica. Il s'agit d'un projet de recherche pour concevoir un verre capable de stocker des données sur une très longue période sans perte de données ou d'altér...
www.programmez.com
December 22, 2025 at 8:02 AM
les recherches sur le stockage éternel sur du verre se multiplient
www.programmez.com/actualites/l...
www.programmez.com/actualites/l...
Reposted by Loïc Mathieu
We are considering raising the framework Java baseline to 25 in Micronaut 5 github.com/micronaut-pr... #java
Considering raising the Java baseline to 25 for Micronaut 5 · micronaut-projects micronaut-core · Discussion #12288
We are considering raising the Java baseline to Java 25 for Micronaut 5. It will also mean raising the Kotlin version to 2.3. Why? We use major version releases to raise the Java baseline, and as a...
github.com
December 22, 2025 at 5:01 PM
We are considering raising the framework Java baseline to 25 in Micronaut 5 github.com/micronaut-pr... #java
Reposted by Loïc Mathieu
Kubernetes 1.35 have been released 🎉
With 3 releases each year, it cannot be easy to know the new features, changes and enhancements.
Let's understand Kubernetes 1.35, Timbernetes, with this changelog in a visual way:
dev.to/aurelievache...
@cncf.io
With 3 releases each year, it cannot be easy to know the new features, changes and enhancements.
Let's understand Kubernetes 1.35, Timbernetes, with this changelog in a visual way:
dev.to/aurelievache...
@cncf.io
Understanding Kubernetes: part 60 – Kubernetes 1.35 Changelog
Serie of sketchnotes about Kubernetes. Explaining in a visual way Kubernetes principles.
dev.to
December 19, 2025 at 11:35 AM
Kubernetes 1.35 have been released 🎉
With 3 releases each year, it cannot be easy to know the new features, changes and enhancements.
Let's understand Kubernetes 1.35, Timbernetes, with this changelog in a visual way:
dev.to/aurelievache...
@cncf.io
With 3 releases each year, it cannot be easy to know the new features, changes and enhancements.
Let's understand Kubernetes 1.35, Timbernetes, with this changelog in a visual way:
dev.to/aurelievache...
@cncf.io
Reposted by Loïc Mathieu
Docker Hardened Images (DHI) is now free and open source (Apache 2.0) 🎉
- hardened, minimal, near-zero CVEs images & helm charts
- SBOM & provenance attestations
www.docker.com/blog/docker-...
@docker.com #SupplyChainSecurity
- hardened, minimal, near-zero CVEs images & helm charts
- SBOM & provenance attestations
www.docker.com/blog/docker-...
@docker.com #SupplyChainSecurity
Hardened Images for Everyone | Docker
Security for everyone. Docker Hardened Images are now free to use, share, and build on with no licensing surprises.
www.docker.com
December 17, 2025 at 2:14 PM
Docker Hardened Images (DHI) is now free and open source (Apache 2.0) 🎉
- hardened, minimal, near-zero CVEs images & helm charts
- SBOM & provenance attestations
www.docker.com/blog/docker-...
@docker.com #SupplyChainSecurity
- hardened, minimal, near-zero CVEs images & helm charts
- SBOM & provenance attestations
www.docker.com/blog/docker-...
@docker.com #SupplyChainSecurity
Reposted by Loïc Mathieu
In this week's blog post, you'll learn that JFR doesn't like arrays in other complex types as fields in custom JFR events, and what types are supported: mostlynerdless.de/blog/2025/12...
Don't use Arrays or other Complex Types in Custom JFR Events - Mostly nerdless
Learn about arrays and complex types in custom JFR events and about all the supported field types in this weeks blog post.
mostlynerdless.de
December 12, 2025 at 7:49 AM
In this week's blog post, you'll learn that JFR doesn't like arrays in other complex types as fields in custom JFR events, and what types are supported: mostlynerdless.de/blog/2025/12...
Not having transactions didn't mean you couldn't implement a lock!
This is how we implement a lock mechanism in Elasticsearch inside Kestra.
www.loicmathieu.fr/wordpress/in...
This is how we implement a lock mechanism in Elasticsearch inside Kestra.
www.loicmathieu.fr/wordpress/in...
Implementing a lock in Elasticsearch | Loic's Blog
At Kestra, the workflow orchestration and scheduling platform I work for, we have two repository implementations: JDBC (with support for H2, MySQL, and Postgres) and Elasticsearch. In JDBC, locking a…
www.loicmathieu.fr
December 11, 2025 at 11:41 AM
Not having transactions didn't mean you couldn't implement a lock!
This is how we implement a lock mechanism in Elasticsearch inside Kestra.
www.loicmathieu.fr/wordpress/in...
This is how we implement a lock mechanism in Elasticsearch inside Kestra.
www.loicmathieu.fr/wordpress/in...
Reposted by Loïc Mathieu
#Google announcing official #MCP support for various Google and #GoogleCloud services
(#BigQuery, #GKE, security, #GoogleMaps...)
cloud.google.com/blog/product...
(#BigQuery, #GKE, security, #GoogleMaps...)
cloud.google.com/blog/product...
December 11, 2025 at 9:40 AM
#Google announcing official #MCP support for various Google and #GoogleCloud services
(#BigQuery, #GKE, security, #GoogleMaps...)
cloud.google.com/blog/product...
(#BigQuery, #GKE, security, #GoogleMaps...)
cloud.google.com/blog/product...
Reposted by Loïc Mathieu
Why write engineering blogs? Here’s how some of our favorite bloggers responded to the question “Why did you start blogging and why do you continue?” writethatblog.substack.com/p/why-write-...
December 10, 2025 at 3:29 PM
Why write engineering blogs? Here’s how some of our favorite bloggers responded to the question “Why did you start blogging and why do you continue?” writethatblog.substack.com/p/why-write-...
Reposted by Loïc Mathieu
Interesting times at @azulsystems.bsky.social
Announcement by @speakjava.bsky.social: "More Java From Azul! ... We see many synergies between how Payara supports Jakarta EE applications and how Azul supports the JDK."
#Java #Azul #Foojay
foojay.io/today/more-j...
#Java #Azul #Foojay
foojay.io/today/more-j...
More Java From Azul!
Strategic acquisition bolsters Azul’s Java platform with complementary products, deep Java expertise and accelerated go-to-market capabilities!
foojay.io
December 11, 2025 at 10:29 AM
Interesting times at @azulsystems.bsky.social
Reposted by Loïc Mathieu
Expand your #Java applications' performance with this new guide on optimizing #MongoDB queries by Farhan Hasin Chowdhury. Boost efficiency and enhance load times now! #Java #MongoDB #Optimization foojay.io/today/optimi...
Optimizing MongoDB Queries in Java Applications
Modern Java applications often struggle with performance bottlenecks that have little to do with the JVM itself. In most cases, the culprit lies deeper in how the application interacts with its databa...
foojay.io
December 10, 2025 at 6:44 AM
Expand your #Java applications' performance with this new guide on optimizing #MongoDB queries by Farhan Hasin Chowdhury. Boost efficiency and enhance load times now! #Java #MongoDB #Optimization foojay.io/today/optimi...
Reposted by Loïc Mathieu
Finding the right memory size for Java apps is tricky but vital for performance. 🧩 @frankdelporte.be’s blog shows how GC logs, JMeter tests, and Azul vs OpenJDK builds reveal key insights. Optimize cost + speed here: https://bit.ly/4pQ0S9H
#Java #Performance
#Java #Performance
Learn More About the Memory Use of Java Applications
Determining the ideal memory size for Java applications can be challenging, but critical to achieve maximum performance.
bit.ly
December 6, 2025 at 4:45 PM
Finding the right memory size for Java apps is tricky but vital for performance. 🧩 @frankdelporte.be’s blog shows how GC logs, JMeter tests, and Azul vs OpenJDK builds reveal key insights. Optimize cost + speed here: https://bit.ly/4pQ0S9H
#Java #Performance
#Java #Performance
Reposted by Loïc Mathieu
📝 Blogged: "You Gotta Push If You Wanna Pull"
Wrote up some thoughts on push vs. pull queries, materialized views, and why data duplication isn't something to fear.
👉 www.morling.dev/blog/you-got...
Wrote up some thoughts on push vs. pull queries, materialized views, and why data duplication isn't something to fear.
👉 www.morling.dev/blog/you-got...
December 7, 2025 at 4:28 PM
📝 Blogged: "You Gotta Push If You Wanna Pull"
Wrote up some thoughts on push vs. pull queries, materialized views, and why data duplication isn't something to fear.
👉 www.morling.dev/blog/you-got...
Wrote up some thoughts on push vs. pull queries, materialized views, and why data duplication isn't something to fear.
👉 www.morling.dev/blog/you-got...
Reposted by Loïc Mathieu
Pretty impressive vector indexing improvements in Elasticsearch by leveraging GPUs! (via @benwtrent.bsky.social) www.elastic.co/search-labs/...
Elasticsearch GPU: vector indexing acceleration with NVIDIA - Elasticsearch Labs
Discover how Elasticsearch achieves nearly 12x higher indexing throughput with GPU-accelerated vector indexing and NVIDIA cuVS.
www.elastic.co
December 5, 2025 at 9:13 AM
Pretty impressive vector indexing improvements in Elasticsearch by leveraging GPUs! (via @benwtrent.bsky.social) www.elastic.co/search-labs/...
Reposted by Loïc Mathieu
JDK 26 has been branched from the main line and is now in Rampdown Phase One: mail.openjdk.org/pipermail/jd...
openjdk.org/projects/jdk/26/
#JDK26 #OpenJDK #Java
openjdk.org/projects/jdk/26/
#JDK26 #OpenJDK #Java
mail.openjdk.org
December 4, 2025 at 6:53 PM
JDK 26 has been branched from the main line and is now in Rampdown Phase One: mail.openjdk.org/pipermail/jd...
openjdk.org/projects/jdk/26/
#JDK26 #OpenJDK #Java
openjdk.org/projects/jdk/26/
#JDK26 #OpenJDK #Java
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 contact@devlille.fr !
Si vous souhaitez plus d'informations, n'hésitez pas à aller voir notre site ou à nous envoyer un mail à contact@devlille.fr !
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 contact@devlille.fr !
Si vous souhaitez plus d'informations, n'hésitez pas à aller voir notre site ou à nous envoyer un mail à contact@devlille.fr !
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...