Enjoy my new, artisanal blog post about #JSpecify and #NullAway, a fresh take on null safety in the #Java world. Be warned, may contains #Lombok. Happy weekend you all. info.michael-simons.eu/2025/09/26/j...

TIL: In #Java, List.subList() and List.reversed() are implemented smartly. You may call these methods as many times as you want and in any order, but you don't get a long chain of references which leads to StackOverflowError. The longest chain of views is two: reversed -> subList -> original list.

Lazy constant semantics (preview) rather than StableValue static final List<OrderController> ORDERS = List.ofLazy(POOL_SIZE, _ -> new OrderController()); openjdk.org/jeps/526

Just read an estimation of when JDK’s Stable Values could be final, JDK 28 **at the earliest**.

Nice engineering blog post on some query filtering at scale. There are some lessons in there. They used a "bloofi " multidimensional bloom filters. axiom.co/blog/buildin... lemire.me/en/publicati...

Y'a comme un pattern qui se dégage 🙃

OMG it makes a huge difference. Without even pinning to tier 1 ("dev" mode) we have a new record base startup of 361ms on my M4 MBA. I'm playing with some other tweaks and a longer training run now.

Today I learned that since #JDK 11, there is now in thread dumps - cpu=... : the time the thread spent executing on the CPU. - elapsed=... : the wall clock time passed since the thread was started. bugs.openjdk.org/browse/JDK-8... I’m not proud to have missed that 🤦‍♂️

I just discovered you could type LaTeX in MS Word equations 😱

New toy, "residence graphs": tracking the compilation level for top method in the stack. On the left, normal JIT mode: compilers are busy, intp -> T2 -> T3 code is hot; T4 code slowly takes over. On the right, normal AOT+JIT (Leyden) mode: AOT code carries most of it, JIT happens to plug the holes.

#Java peers...Find out what #JDK enhancement proposals have been integrated in #JDK25 since #JDK21: openjdk.org/projects/jdk...

🚀 Kotlin DataFrame 1.0.0-Beta3 is here! Working with data in Kotlin is now smoother thanks to Parquet and DuckDB support, improved compile-time schema tracking via the Compiler Plugin, and refreshed docs. Read the full release notes 👇 kotl.in/w2eq2c

Free isn’t free: the infrastructure behind open source has real costs, and it’s time we aligned usage with responsibility. This morning we jointly launch a new blog and open letter on sustainable stewardship. www.sonatype.com/blog/from-ab...

Jimmy Kimmel and other late-night comedians have certainly said things about me that I found offensive, even outrageous. It never crossed my mind to call up the networks and say, "Hey, get rid of this guy." Because that's not how America works. play.prx.org/listen?ge=pr...

Video now available for my 2025 #JVMLS talk "Paths to support additional numeric types on the Java platform": youtu.be/xCdJb_zI5us

📢 AssertJ 3.27.5 has been released! This 🛠️ upgrades ByteBuddy to its latest version to ensure smooth compatibility with Java 25 ☕ Happy assertions! github.com/assertj/asse...

USA 🇺🇸 Comedy Central a supprimé l'épisode de South Park où une satire de Charlie Kirk était représentée. Andrew Kolvet, producteur de "The Charlie Kirk Show" demande à Comedy Central de reprendre la diffusion de l'épisode.

With ✨Swift 6.2 ✨, you can now target WebAssembly, including WASI support. Get started here: www.swift.org/documentatio... #Wasm

Brillantissime Gorafi.

Si vous n'avez pas vu passer l'info : À partir du 3 nov, LinkedIn utilisera vos données pour son IA, si vous n'avez pas indiqué votre désaccord. Une option a été ajoutée par rapport à ça et elle est activée par défaut 😶🫠 Perso, je déteste qu'on m'active par défaut une option sur mes données 😤

One kernel per cpu, or multi kernel on a system lwn.net/SubscriberLi... Patches only at this point. Via Mark E. Dawson, Jr x.com/medawsonjr

Sun Hα, 8x disk + limb mosaic, 6700x6700px (~57cm at 300dpi), remastered from 2 week old capture. This is the best Sun Hα shot I have so far. Feels like squeezing the final performance drops from Coronado PST, which is ostensibly visual only instrument, ha! I mean, Hα!

ah i should read the full article - you highlight the limits...yes, linux only ;)

This is not what democracy looks like.

RIP Applets 😢 openjdk.org/jeps/504

With Java 25, there is finally a CPU-time profiler in the OpenJDK. You can read more about this new profiler and some implementation details in my blog series starting with mostlynerdless.de/blog/2025/06... #java25

"Wasm 3.0 Completed" webassembly.org/news/2025-09...

JEP 8366891 Structured Concurrency (Sixth Preview) Submitted (for JDK26, awaiting a proper JEP number) openjdk.org/jeps/8366891

Nice usage of #zstd for tarball via Kelly Sommers on Twitter. x.com/vmg/status/1...

🎓 JEP 500 moved to candidate Title: Prepare to Make Final Mean Final Type: feature Component: core See openjdk.org/jeps/500

Java 25 / JDK 25: General Availability: mail.openjdk.org/pipermail/jd... Features: openjdk.org/projects/jdk... Downloads: jdk.java.net/25/ #Java25 #JDK25 #OpenJDK #Java

Don't worry, there will be a GraalVM 25 release today. It is indeed the case that GraalVM native image offers much better execution performance characteristics.

Oracle detaches #GraalVM from the Java SE train 👀 • JDK 24 = last with Graal JIT / GraalVM in Java SE • Native Image discontinued for #Java SE (-> Leyden) • GraalVM team pivots to non-Java (GraalPy, GraalJS) 👉 Java devs: migrate to C2 JIT & track Leyden AOT work blogs.oracle.com/java/post/de...

Did Oracle just killed #graalvm in favor of #leyden? 😮 "The goals of improving the startup time, time to peak performance, and footprint of Java programs are being pursued further in OpenJDK’s Project Leyden as a standard part of Java." blogs.oracle.com/java/post/de...

@graalvm.org team transitioning focus to non-Java including GraalPy & GraalJS. GraalVM for JDK 24 is the last release under Java SE license. Native Image & co, is being discontinued for Java SE customers. Startup time, time to peak perf, footprint pursued under @openjdk.org’s Project Leyden.

Has Apple finally fixed their slow dynamic linking or what? #babashka now has 6ms or so startup on macOS (15.6). This used to be around 20-25ms. #clojure @graalvm

Seen this on X, #openjdk #Loom using #FFM API to leverage #io_uring : github.com/openjdk/loom...

#iOS26 #java25 #openjdk

Où Thibault, 24 ans, diplôme d’ingénieur en poche, réclame « une dictature soft » après avoir écouté Papacito.

Prenez quelques minutes de votre week-end pour lire le long format de @marieboeton.bsky.social dans La Croix Hebdo sur "ces jeunes Français qui rêvent d'un pouvoir autoritaire". Et faites-le lire, aussi, aux jeunes de votre entourage.

Bilan de la #SécuritéRoutière 2024 : 77 % des tués sont des hommes 75 % des blessés graves sont des hommes 84 % des responsables d’accidents mortels sont des hommes www.onisr.securite-routiere.gouv.fr/etat-de-lins...

Next Tuesday (Sep 16th), #Java 25 will be released and we'll celebrate with a 4-hour live stream on the Java YouTube channel, starting at 15:00 UTC. There will be code, guests, jokes, gaffes, maybe even cake. 😀 (I hear there will be no cake. 😭) Come join us: www.youtube.com/live/duIceCX...

#jdk character shaping / layout is a complex problem. The description here dive in many details of how things work. Yet the magic happens in Harfbuzz, this 3rd party lib is used in many software. github.com/openjdk/jdk/...

Dooh Groovy that adds a `GStringImpl` to a `Set<String>`, code was `theSet += "foo$bar”`. 🤦‍♂️

Javadoc in-editor-rendering still broken (truncated) in @intellijidea.com 2025.2.2 RC after computer goes to sleep… Need to restart IDEA to get it right again.

Let's Take a Look at... JEP 483: Ahead-of-Time Class Loading & Linking! buff.ly/vXDtFq9 #Java #jdk #jep483

🎓 JEP 524 moved to candidate Title: PEM Encodings of Cryptographic Objects (Second Preview) Type: feature Component: security / security See openjdk.org/jeps/524

Interesting. QEMU 10.1 supports WASM and can run inside a browser. 🤔 wiki.qemu.org/ChangeLog/10.1

No more SerialGC in small containers in Java NN? #java openjdk.org/jeps/523

Plus d'infos : www.nasa.gov/news-release...