Lots of us from the SSW will be attending @ecoop-conference.bsky.social, come and talk to use at ICOOOLPS, MPLR, the Demo Track, DEBT, ECOOP Academy, and at the poster session! Christoph A. is presenting early ideas of how to make AOT meta-compilation work for dynamic languages. 1/...

Lots of us from the SSW will be attending @ecoop-conference.bsky.social, come and talk to use at ICOOOLPS, MPLR, the Demo Track, DEBT, ECOOP Academy, and at the poster session! Christoph A. is presenting early ideas of how to make AOT meta-compilation work for dynamic languages. 1/...

Pleased to announce that the application deadline for the Fourth ACM Europe Summer School on Distributed and Replicated Environments (DARE 2026) has been extended to 19 June 2026! This extension is made possible thanks to additional funding from ACM and SIGSOFT. dare-milan.github.io

Might have won something. Instead of 10h with @deutschebahn.com, they want me to travel 20h with them... Enjoying 10 trains and busses, instead of 3... Got rebooked "automatically" it seems. Thanks AI!

Today, May 22, my book about ZGC is finally ready and available to order! I can recommend reading it if you want to learn more about the magic nature of ZGC. You can order it here (among many places): www.routledge.com/The-Z-Garbag...

REMINDER: Our call for a professorship in the programming language field ends this Sunday! Make sure your application is in the system on time.

Ugh. Past me underestimated how many experiments future me is going to run. ReBenchDB just overflowed 16bit ints on the number of trials (i.e., experiments per benchmark machine). Is this something to celebrate? The number of collected measurements already requires 24bits...

The program of ICOOOLPS is now online: 2026.ecoop.org/home/ICOOOLP... And today is the last day for early registrations. Interested in programming language implementation, compilation, and optimization? Join us in Brussels! Don't know what to expect? 1/2

The program of ICOOOLPS is now online: 2026.ecoop.org/home/ICOOOLP... And today is the last day for early registrations. Interested in programming language implementation, compilation, and optimization? Join us in Brussels! Don't know what to expect? 1/2

⏳ 7 days left for early registration at #ECOOP2026! Don't miss your chance to hear Sandrine Blazy take us from mechanized semantics to verified compilation, and find out what 15 years of Viper looks like through Peter Müller's eyes. 📍 Brussels, BE | Jun 29–Jul 3 2026.ecoop.org/attending/re...

Towards Least-Privilege WebAssembly Applications: Transparent Interposition for WebAssembly Components Olav Blaak talked about his approach to fine-grained security policies for Wasm components. youtu.be/a3a_le54tW0 This one was another MoreVMs'26 talk.

Towards Least-Privilege WebAssembly Applications: Transparent Interposition for WebAssembly Components Olav Blaak talked about his approach to fine-grained security policies for Wasm components. youtu.be/a3a_le54tW0 This one was another MoreVMs'26 talk.

Lecture 7, and we have a recording. Some said it would be impossible. Others suggested that computers were a mistake in the first place. And sometimes I reminded myself of younger me who observed/predicted that professors have no technical skills any longer. Is it perfect? 1/2

At this point, the expectations from the students to get recordings is zero. Maybe it's a good thing. But, I won't be defeated by technology! Wish me luck 🙈

After the uni's browser-based lecture recording system failed in 6 different ways (it worked last term), I am running out of ideas. I guess ffmpeg is my next best option.

Retaining the Renaissance: Lessons Learned For Maintainable Benchmark Suites Lubomír Bulej talk at MoreVMs'26 about keeping a benchmarking suite relevant, and what we may learn from the Renaissance project. youtu.be/SF3T0YHHZMc

Retaining the Renaissance: Lessons Learned For Maintainable Benchmark Suites Lubomír Bulej talk at MoreVMs'26 about keeping a benchmarking suite relevant, and what we may learn from the Renaissance project. youtu.be/SF3T0YHHZMc

Honored to give my talk at #RubyKaigi this year! Slides are available here: blog.peterzhu.ca/assets/rubyk...

Code Layout Optimization Guided by Temporal Profiling Information by Marko Spasic This MoreVMs'26 talk improves the start up of applications by making sure that the code that's needed next is close by. Especially relevant for larger binaries. youtu.be/57KtH-w37B0

Code Layout Optimization Guided by Temporal Profiling Information by Marko Spasic This MoreVMs'26 talk improves the start up of applications by making sure that the code that's needed next is close by. Especially relevant for larger binaries. youtu.be/57KtH-w37B0

The Promise of Static Profiling: Exploring the Limits by Milan Cugurovic Another MoreVMs'26 talk. This one is on using machine learning to develop compiler heuristics. youtu.be/-14jvsxXb3w

The Promise of Static Profiling: Exploring the Limits by Milan Cugurovic Another MoreVMs'26 talk. This one is on using machine learning to develop compiler heuristics. youtu.be/-14jvsxXb3w

Hi! We build fast verilog simulators using just in time compilation. Our simulator outperforms existing verilog simulators by up to x100. verijit is a project by @cfbolz.bsky.social and Can Joshua Lehmann. Check out out demo video here: www. youtube.com/watch?v=PXgUsEjvAOY

Packrat Parsing at the Speed of Wasm by @dubroy.com Another MoreVMs'26 talk. Sound isn't great unfortunately, but it's still a very interesting topic for anyone building languages for the modern web! youtu.be/C2QxWtqlq9E

Packrat Parsing at the Speed of Wasm by @dubroy.com Another MoreVMs'26 talk. Sound isn't great unfortunately, but it's still a very interesting topic for anyone building languages for the modern web! youtu.be/C2QxWtqlq9E

We are going to put some of the MoreVMs'26 talks online. First up: How Many Compilers Is Too Many? A Look at V8’s History, Tradeoffs, and Architectural Choices By Leszek Swirski from Google's V8 team youtu.be/LpJ79MxplUk

Programování není jen kód, je to kultura! 💻📜 Rektor UK Jiří Zima udělil prestižní Cenu Bedřicha Hrozného za tvůrčí počin a my máme obrovskou radost, že ji získal docent Tomáš Petříček z naší @mff.unikarlova.cuni.cz! 🏆

We are going to put some of the MoreVMs'26 talks online. First up: How Many Compilers Is Too Many? A Look at V8’s History, Tradeoffs, and Architectural Choices By Leszek Swirski from Google's V8 team youtu.be/LpJ79MxplUk

C interpreters underlie many of our most widely used language implementations -- but they're slow. Wouldn't it be great if we could turn them into JIT compiling VMs? This video shows what happens when we do just that to the normal Lua VM (first) and "yklua" (Lua w/JIT, second).

I'm starting at Datadog today!

Just received a Most Notable Paper Award for our paper “Cross-language compiler benchmarking: are we fast yet?” published at the Dynamic Languages Symposium 2016. Congratulations to my co-authors @stefan-marr.de and Hanspeter Mössenböck!

GraalWasm just got faster! 🔥 The new threaded interpreter delivers significantly better interpreter performance. In interpreter benchmarks, total execution time is reduced by 5-40%! Details: github.com/oracle/graal...

New post on the @ohmjs.org blog — Inside Ohm's PEG-to-Wasm compiler → ohmjs.org/blog/2026/03... v18 is now more than 50x faster for real-world grammars while using about 10% of the memory 🔥 …this post goes into the details of how it's built.

Interesting theme that came up in a few talks (incl. mine) was flat/packed tree representations. Michael Vollmer (Univ. of Kent) has done tons of interesting work in this area: recurial.com

Less than a week until ‹Programming› 2026 in Munich (March 16–20)! What’s ahead: - 4 days of deep-dive sessions. - Workshops including MoreVMs, PX/26, SCLIT, VIMPL, and Substrates. - Networking in the heart of Bavaria. We can’t wait to see you there! Final details: 2026.programming-conference.org

I hate having to consult a decoding table when reading dense text. That's as true for abbreviated author names or numbers as it is for "Greek" letters instead of names I may have a chance to remember. It's also true for general abbreviations. A few can be ok. Too many and I'll probably get lost.

Oh wow, someone is scraping researchr and sends "we'll organize your travel" spam. Ugh.

The deadline of the ICOOOLPS workshop is soon! Want to talk about language implementation challenges, experiences, and/or research? It will be in sunny Brussels end of June! 2026.ecoop.org/home/ICOOOLP...

The deadline of the ICOOOLPS workshop is soon! Want to talk about language implementation challenges, experiences, and/or research? It will be in sunny Brussels end of June! 2026.ecoop.org/home/ICOOOLP...

A bit late and not yet finalized, but our program for MoreVMs'26 is online. Early registration deadline is in a few hours, but will remain open afterwards still. Join us in Munich for a day of talks around language implementation! 2026.programming-conference.org/home/MoreVMs...

A bit late and not yet finalized, but our program for MoreVMs'26 is online. Early registration deadline is in a few hours, but will remain open afterwards still. Join us in Munich for a day of talks around language implementation! 2026.programming-conference.org/home/MoreVMs...

Final 24h! Early bird for #prog26 ends tomorrow, Feb 20. Don't miss the art & science of programming in Munich (Mar 16–20)! Register: 2026.programming-conference.org Submit to the Substrates workshop: 2026.programming-conference.org/home/substra...

ISMM (International Symposium on Memory Management) is going to hosted at PLDI'26. Please consider submitting your awesome papers on memory management by 27th March: conf.researchr.org/home/ismm-20...

Overheard some non-technical people: "Oh, that's all AI, I wouldn't touch that." It was about some finance scam app...

Programming Language Implementation: In Theory, We Understand. In Practice, We Wish We Would. In about a month, on March 9th, I'll give my inaugural lecture. I'll probably complain about the complexity of modern programming language implementations... stefan-marr.de/2026/02/prog...

We are organizing the third edition of the "Fuzzing and Software Security Summer School 2026", at NUS on 26th–29th May 2026. We have a stellar set of speakers and will also have a Hackathon. Please share, and/or consider joining! fuzzingsummerschool.github.io/index.html

Programming Language Implementation: In Theory, We Understand. In Practice, We Wish We Would. In about a month, on March 9th, I'll give my inaugural lecture. I'll probably complain about the complexity of modern programming language implementations... stefan-marr.de/2026/02/prog...

Just passed by this fun mural www.cologne-tourism.com/arts-culture...

Python, Is It Being Killed by Incremental Improvements? In October, I gave a talk at SPLASH, which is now online. Is the title click bait? Click the link below, watch the recording, and find out! Spoiler: I think Python has a problem but we can do something about it. stefan-marr.de/2026/01/pyth...

Python, Is It Being Killed by Incremental Improvements? In October, I gave a talk at SPLASH, which is now online. Is the title click bait? Click the link below, watch the recording, and find out! Spoiler: I think Python has a problem but we can do something about it. stefan-marr.de/2026/01/pyth...