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Christian Humer

@chumer.dev

400 followers 190 following 440 posts

Working on Truffle/GraalVM at Oracle Labs. ME/CFS Caretaker and Activist (https://ooe-mecfs.at). Austrian expat in Zurich. https://chumer.dev

ooe-mecfs.at).

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Christian Humer @chumer.dev · Nov 28

Good news everyone! 🎉 After two years of R&D, we've finally merged the Bytecode DSL into master! Truffle now generates bytecode interpreters from AST-like specifications for you. ASTs are dead, long live bytecodes!

Check it out: github.com/oracle/graal...

Conceptual example of the Bytecode DSL. Use any parser you like, create operations using an AST-like builder with custom node-like operations. The DSL generates an automatic bytecode format with optimizations for you.

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Reposted by Christian Humer

TruffleRuby @truffleruby.bsky.social · 22d

TruffleRuby 25.0 is released! 🚀🎉
It can now run native extensions in parallel, just like Ruby code already ran in parallel in Threads on TruffleRuby!
It also features many compatibility improvements and notably support for custom Digest algorithms.
github.com/oracle/truff...

Release TruffleRuby 25.0.0 · oracle/truffleruby

TruffleRuby is a high-performance implementation of the Ruby programming language. It aims to be fully compatible with the standard implementation of Ruby, MRI. More information is available at htt...

github.com

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Christian Humer @chumer.dev · 22d

Just giving people free time is not enough. I think we should foster the culture of volunteering more. Build infrastructure to make it easier and broader. Build spaces to explore. Some of the richest life experiences can come from that and it can make our society stronger and more connected.

Christian Humer @chumer.dev · 22d

I personally think we shouldn't work less hours but we should work less weeks. More time for side projects and volunteering.

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Christian Humer @chumer.dev · 23d

Lots of innovative features in this release. We hope you enjoy them!

Of course, there is so much more:
www.graalvm.org/release-note...

Whats your favorite?

GraalVM Community Edition 25

GraalVM is an advanced JDK with ahead-of-time Native Image compilation.

www.graalvm.org

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Christian Humer @chumer.dev · 23d

Truffle now automatically detects deoptimization cycles. We also found and fixed many such bugs by enabling this feature for our tests!

Learn more here:
github.com/oracle/graal...

github.com

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Christian Humer @chumer.dev · 23d

You can now switch from internal to external isolate mode with untrusted code. Running untrusted code in an external process can provide an additional layer of security.

Also, did I mention that GraalWasm now supports untrusted code execution?

More here: www.graalvm.org/latest/refer...

Embedding Languages

GraalVM is an advanced JDK with ahead-of-time Native Image compilation.

www.graalvm.org

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Christian Humer @chumer.dev · 23d

Polyglot isolates now ship with a new memory isolation technique called Monocle. Monocle is about 4x faster compared to the previous, fence-based mitigation.

My colleagues also published a wonderful paper about this:
www.shwetashinde.org/publications...

www.shwetashinde.org

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Christian Humer @chumer.dev · 23d

The GraalWasm Java Embedding API has gotten a face-lift. It now works more similarly to the Wasm embedding API in JavaScript.

Here is an extensive migration guide:
github.com/oracle/graal...

github.com

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Christian Humer @chumer.dev · 23d

All language and tool Maven artifacts are now OSS licensed! For example, the 'js' Maven artifact is now identical to the 'js-community' counterpart.

If you want extensions like sandboxing, you now need to depend on the 'truffle-enterprise' dependency explicitly.

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Christian Humer @chumer.dev · 23d

GraalVM 25 released today! 🎉

My favorites this release👇

GraalVM @graalvm.org · 23d

GraalVM 25 is here, with lots of updates for native compilation, GraalPy, GraalJS, and WebAssembly.
Faster and better than ever!🐰🚀
Download: www.graalvm.org/downloads/
Release notes: www.graalvm.org/release-note...

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Christian Humer @chumer.dev · Sep 7

That was my total lunar eclipse today here in Zurich. There was a crowd of astrophotographers around. The moon was barely visible for 5 seconds, but the crowd was "ooooohhhh aaaahhh". I love these people.

Christian Humer @chumer.dev · Aug 16

Die Sicherheitsgarantien der USA sind neu. Darf man aber auch nicht überbewerten.

Reposted by Christian Humer

GraalVM @graalvm.org · Jul 24

openHAB, the open source home automation software, has integrated GraalPy!🤖🐍
"Unlike the Jython Scripting add-on, it offers full Python 3.11 support and is future-proof. It can be used as a scripting language in UI, file-based rules, and transformation services"
www.openhab.org/blog/2025-07...

openHAB 5.0 Release

A new major release of openHAB is here! openHAB 5.0 comes with a lot of exciting new features and improvements, including Matter support, a new Python Scripting add-on and a ton of other enhancements.

www.openhab.org

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Christian Humer @chumer.dev · Jun 19

My favourite event of the year, the GraalVM community summit, has a date!

If you are building with GraalVM, Truffle or one of our languages, please make sure to come and tell us about it! In return, you will get a chance to shape where we are headed next!

GraalVM @graalvm.org · Jun 19

GraalVM Community Summit is back!🚀

Join us for two days of team and community collaboration, discussing new directions, and shaping the future of the project!

Learn more and join: www.graalvm.org/community/su...

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Christian Humer @chumer.dev · Jun 6

Ja das gibt's bei uns alles auch. 😔

Christian Humer @chumer.dev · Jun 6

Es sind viel mehr Kinder betroffen als die meisten glauben. Man sammelt aber keine Daten dazu zumindest hier in Ö von Versorgung ganz zu schweigen. Kinder sind leider oft auch schwerer betroffen als Erwachsene. Unsere lokalen Betroffeneninitiativen werden überrannt mit Anfragen.

Reposted by Christian Humer

GraalVM @graalvm.org · Jun 2

Ubuntu now provides the GraalVM JDK with Native Image as a snap for a quick installation: discourse.ubuntu.com/t/leveling-u...

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Christian Humer @chumer.dev · May 12

If you are looking for a high impact research to donate to I can recommend the following charities:

www.weandmecfs.org
www.omfcanada.ngo

Every coin counts.
Thank you!

Christian Humer @chumer.dev · May 12

If you want to join me in protest in Vienna today:
bsky.app/profile/mecf...

Also please go donate to the organizer, they are great!

Ö. Ges. für ME/CFS @mecfs.at · May 11

📣📢Protestaktion 12.Mai📣📢

Seid ihr bereit? Ist das #ME/CFS Awareness-Sackerl und -Shirt zurechtgelegt? Wir freuen uns morgen mit euch Zeichen zu setzen!

📍16:00-18:00
📍Heldenplatz Wien - Erzherzog-Reiterstatue

Alle Infos unter👉 mecfs.at/unversorgts...

#MillionsMissing #unversorgtseit1969

Zu lesen ist “Wir setzen ein Zeichen: 12. Mai 2025, 16:00-18:00, Heldenplatz. ÖG ME/CFS Protestaktion”. Weiters sieht man dunkelblaues Feldbett.

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Christian Humer @chumer.dev · May 12

If you want to learn more about this disease. I found this description quite good:

www.weandmecfs.org/disease

What is ME/CFS? • WE&ME Foundation

Raising awareness, funds and support for #ME/CFS.

www.weandmecfs.org

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Christian Humer @chumer.dev · May 12

Today is World ME/CFS day. My partner has been severely suffering from this disease for almost three years now.

The care and research situation is really dire. It's so bad I even made a sign myself. Probably one of the hardest engineering challenges I had to tackle in a while.

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Reposted by Christian Humer

Adam Bien @adambien.blog · May 11

☕️🎙️"Run Java with Java" an airhacks.fm conversation with @chumer.dev about GraalVM and Espresso is ready to listen 👉 adambien.blog/roller/run_j... #java #airhacks #podcast

airhacks.fm podcast

podcast with adam bien

airhacks.fm

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Christian Humer @chumer.dev · Apr 24

Apple's Pkl team is hiring a core team member working on on their GraalVM/Truffle language. Well if that is not a great opportunity, what is?

github.com/apple/pkl/di...

We are hiring! · apple pkl · Discussion #1048

Are you interested in working on Pkl? Do you know anyone that would be great on the Pkl team? Come help us as we grow our young language! We are looking for another core team member. As a core team...

github.com

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Reposted by Christian Humer

Fabio Niephaus @fniephaus.com · Apr 22

Want to learn more about the new #WebAssembly backend for @graalvm.org and what you can do with #GraalWasm? 🤓

Our #WasmIO25 talk is now on YouTube. Slides are available, too.

Wasm I/O @wasm.io · Apr 22

🧩 The Future of Write Once, Run Anywhere: From Java to WebAssembly by Patrick Ziegler & @fniephaus.com @ Wasm I/O 2025

▶️ Video: youtu.be/Z2SWSIThHXY

🔗 Slides: 2025.wasm.io/slides/the-f... #wasmio25 @graalvm.org

The Future of Write Once, Run Anywhere: From Java to WebAssembly by Patrick Ziegler & Fabio Niephaus

YouTube video by WASM I/O

youtu.be

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Christian Humer @chumer.dev · Apr 20

Assume you have a full Maven Central Dependency Graph. What questions would you ask it?