Alex Bradbury

"The Shift of Theseus — Toy Bit Provenance Abstract Domain" I just posted this on the PyPy blog pypy.org/posts/2026/1...

Finally got to put together a complete deck on the state of open models. What they are, licenses, how competitive they are, signs people are using them, distillation's impact, and how we balance the risks and benefits of openness! natolambert.com/slides/2026/...

Recently learned there's a name for the weird and wonderful art style used on the covers and pages of textbooks and some computer manuals from the 1990s. It's called Utopian Scholastic. Think hi-res, well-lit animals, instruments, food and similar against clinical white negative space. Encartawave.

New post on a fun wee series of patches to speed up a popcount function 115x in LLVM: lukelau.me/2026/10/17/t... #riscv #llvm

GitHub is not reliably letting LLVM contributors merge their commits and people have been encountering this for days now discourse.llvm.org/t/psa-projec...

Remembering Johannes Doerfert: "It is with great sadness that we share the news of the passing of Johannes Doerfert. [...] Johannes was one of the most prolific and respected contributors to the LLVM compiler project, and his loss will be deeply felt." blog.llvm.org/posts/2026-0...

Today Igalia turns 25. Ten engineers started it in A Coruña in 2001 with no investors and no managers. There are now close to 200 of us, and everything we build still goes upstream. igalia.com/2026/09/21/T...

Here is the video from this years EuroLLVM where I moderated a panel on LLVM in games tech - it was a fun discussion, hope you'll enjoy it! youtu.be/1SM_wDUEEUg?...

Tired of reading yet another lukewarm take on access to AI models? Want to read some real news instead? Well, you're in luck, because I just made a write-up about the latest release of the award-winning SERV, the world's smallest RISC-V CPU. blog.award-winning.me/2026/06/serv...

LLVM Weekly - #650, June 15th 2026. Seeking new LLVM Foundation board members, AI review of PRs, linking massive binaries in LLD, Hygon X86 processors, Windows x64 unwind v3, SpacemiT X60 scheduling model now default for RISC-V, and more llvmweekly.org/issue/650

american startups thinking they have creative company names don’t even know how far behind they are.

Playing around with workflows for interacting with an agent. Here's a little script that helps mark up files with questions and requests. muxup.com/2026q2/minip...

Playing around with workflows for interacting with an agent. Here's a little script that helps mark up files with questions and requests. muxup.com/2026q2/minip...

I chatted with @duswnchl.bsky.social , based in South Korea, who works at the open-source consultancy, and worker-owned cooperative, @igalia.com. We covered her experience over the last 15 years working on WebKit and Chromium. There is no paywall; give it a read! theconsensus.dev/p/2026/05/20...

I've written up notes on how I use Yocto to build RV32 sysroots and a bootable QEMU image muxup.com/building-32-... (Actually posted the first half last week, but then held off finishing off until I could move over to the new Yocto 6.0 release!)

I've written up notes on how I use Yocto to build RV32 sysroots and a bootable QEMU image muxup.com/building-32-... (Actually posted the first half last week, but then held off finishing off until I could move over to the new Yocto 6.0 release!)

I put together a little set of recipes for generating Debian images for amd64, arm64, armhf, ppc64el, riscv64, s390x, ppc64be, and loong64 that are bootable in qemu-system - all done rootlessly, with the rootless debootstrap wrapper I shared a while ago muxup.com/2026q2/boota...

Landed a set of LLDB & GDB plugins in V8 to help inspect JS states in a live process/coredump together with native states ✨ The initial implementation just supports JS stack trace annotations in bt; support for object inspection is coming up! chromium.googlesource.com/v8/v8.git/+/...

Travelling to Dublin for EuroLLVM today - looks like a great line-up of talks. Hopefully see some of you there!

This must've been one of the most challenging things I've worked on in a while. Thanks Bloomberg for sponsoring my work on this, and everyone who helped shipping a fix in time!

That's a wrap on WASM.io Barcelona! Saúl Cabrera presented "Beyond Performance: 5 Years of Improving JavaScript on WebAssembly" — half a decade of deep work making JS faster inside Wasm runtimes. Great to connect with the WebAssembly community. 2026.wasm.io/sessions/bey... #WebAssembly #WasmIo

Big news! Igalia (@igalia.com) is partnering with @eurosky.social to develop the next generation of the open social web. Let's stop waiting for others to fix our problems and start fixing them ourselves. We can just do things. More: www.eurosky.tech/s/Eurosky-Ig...

Tomorrow at Embedded World! Hall 4, Booth 4-443. Demoing Moonforge — live OTA updates on RPi5 via RAUC — plus a Zephyr BLE app built entirely on upstream code, and WPE WebKit on embedded hardware. Talks: Tue 14:45 Yocto best practices, Thu 15:00 web engines for embedded. #EmbeddedWorld #ew26

Some additional datapoints on per-query energy consumption of LLMs across a selection of newer models, thanks to figures from Lambda's model cards muxup.com/2026q1/minip...

Some additional datapoints on per-query energy consumption of LLMs across a selection of newer models, thanks to figures from Lambda's model cards muxup.com/2026q1/minip...

There are many tools for unprivileged sandboxing on Linux. You should probably go use one of them. But I wrote shandbox to scratch my itch muxup.com/shandbox /home/$user/sandbox shows up as /home/sandbox within the shared sandbox, which otherwise can only access explicitly mapped files/dirs.

The EC is putting together an initiative to develop their strategy for open digital ecosystems. Given its potential to push forward the development and funding of open-source software in Europe and beyond, Igalia submitted a response with some suggestions. Read more: www.igalia.com/2026/02/03/I...

Wrote a blog post about the work I've been doing at @igalia.com to implement the Temporal proposal in JavaScriptCore: blogs.igalia.com/compilers/20...

One of the nice parts of #llvm is that often times you'll find yourself needing to do some sort of non-trivial analysis, but usually there's already a pass for it. Here's how you can reuse a block frequency analysis to make a chess engine 7% faster on #riscv: lukelau.me/2026/01/26/c...

New blog post on the journey of the new --build-sea flag and how SEA injection works joyeecheung.github.io/blog/2026/01...

Thanks for the helpful auto-complete, Gmail.

2% of Golang 2025 survey respondents are deploying their Go software to RISC-V. Take that, s390x! go.dev/blog/survey2...

If you're thinking of applying to PLISS, you've got three days left! pliss.org/2026/registr...

2% of Golang 2025 survey respondents are deploying their Go software to RISC-V. Take that, s390x! go.dev/blog/survey2...

This release contains a bunch of PRs I recently submitted to mark features I contributed to as stable/release candidate. Here is a thread about them 🧵:

A video and notebook on a short Introduction to SMT solvers colab.research.google.com/github/philz... www.youtube.com/watch?v=cI2s...

64% of WebKit non-Apple contributions, 20% of Chromium non-Google, 27% of Servo, 39% of test262, and it goes on. And doing all this as a worker-owned, employee-run cooperative. The world would be a very different place if companies like Igalia were the norm rather than the exception in tech.

Nikita Popov (who sadly isn't on Bluesky) has a great new post. LLVM: The bad parts www.npopov.com/2026/01/11/L...

The move to 'forkserver' as the default start method for ProcessPoolExecutor in Python 3.14 is quite a gotcha docs.python.org/3/whatsnew/3... My code was probably broken on MacOS and Windows anyway due to those platforms defaulting to the 'spawn' method.

If we try to use the benchmark results from InferenceMAX to calculate a Watt-hours per LLM query, what do we get? What potential issues are there with the benchmark for this purpose (or in general)? My new post explores this muxup.com/2026q1/per-q...

If we try to use the benchmark results from InferenceMAX to calculate a Watt-hours per LLM query, what do we get? What potential issues are there with the benchmark for this purpose (or in general)? My new post explores this muxup.com/2026q1/per-q...

LLVM Weekly - #627, January 5th 2026. Twelve years of LLVM Weekly, EuroLLVM CfP closing soon, GNU toolchain in 2025 summary, PCH to speed-up LLVM builds, LLVM ABI lowering library starting to land, and more llvmweekly.org/issue/627