Bonsai_term looks very cool. blog.janestreet.com/strace-ui-bo... #ocaml

Using LLMs doesn’t remove the obligation to do your own thinking.

Caml In The Capital is happening again! Our #OCaml meetup is open to anyone: user, researcher, outsider who happens to be interested :) This time, we'll be hosted at the JaneStreet office in London. Please register here if you'd like to attend: www.eventbrite.com/e/caml-in-th...

Modified my elfeed RSS setup to use eww, the built in web browser for Emacs. Massive improvement, loading things is quick enough and no javascript means no ads, but I still get pictures. #emacs

The OCaml Users Survey 2026 is now open! 📊 Share your experience with OCaml - from tools you use to new questions on AI/LLM tooling and debugging. Takes 10-15 minutes, open until May 25th. https://forms.gle/gt5nikqUmoQWeYYQ9

FP-SYD is back in person next month. We have changed the day 1st Monday of each month (4th May) and location is now 1 Denison Street, North Sydney. Thanks to Microsoft for providing the venue. Signup here www.meetup.com/fp-syd/event... #emacs #ocaml #haskell

I wrote up some notes on the #elisp #emacs things I've been working on this month lambdafoo.com/posts/2026-0...

Pleased to say I've tidied up my port of Miasma theme for #Emacs into a proper repo and tagged a 0.1.0 release. github.com/tmcgilchrist... Inspired by recent collaborations with @batsov.net on Emacs modes and his wonderful work on batppuccin.

I like the idea of tangled.org but the current CI setup is more misses than hits right now. Lots of 500 errors trying to run nixery based CI over the weekend.

I’ve already announced this on the forums, but for everyone else www.chrisarmstrong.dev/posts/introd...

I've switched over from tuareg to neocaml for daily work. This mode is great!

Working on a Haskell DWARF library called thorin (tangled.org/tsmc.purely-...) It covers most of the DWARF 4 and 5 spec with a nice writer API for binary and GAS assembly. Needs more testing on real codebases and the weird binaries that gcc/clang produce.

More work on CFI and frame pointers for OCaml, working on getting all this through review and merged. lambdafoo.com/posts/2026-0...

In my own interregnum, but: I’m open to new opportunities. If you’re looking for someone who can lead teams working in AWS/serverless, Typescript or OCaml, and/or take an observability or DevOps lens to their cloud infrastructure, I’d love to chat. I’m based in Sydney for onsite/hybrid/remote

Rather than advent of code, I’m bulk releasing the WIP OCaml libraries I’ve worked on since ICFP. Today it’s ctypes based Capstone bindings github.com/tmcgilchrist.... The project could use some demo applications but it does seem to work for ARM64 code I’ve thrown at it.

The new Ryzen 9950X can chew through llvm and gdb builds no sweat.

I like the idea of Advent of Code, but I always have too many projects I'm already working on.

Soft-launching my OCaml DWARF 5 library Durin (yes LOTR inspired) github.com/tmcgilchrist... since it got posted on news.ycombinator.com/item?id=4611... It is heavily in development, right now focusing on reading DWARF 5 and building debugging tooling for OCaml compiler work. Write support later on

Fun weekend building my son's first PC, we got all the parts right and it booted the first time. 💪 Then we setup Ubuntu for Linux gaming with Proton/Steam. Not exactly the smoothest experience with Ubuntu UI being very laggy but he'll learn more using Linux.

Awesome work!!!!!

All the parts for the new OCaml benchmarking server have arrived. Weekend goal will be putting this all together and setting up Linux.

A pure OCaml implementation of Apache Avro with codec-based design, schema evolution support, and container file format. Version 0.1 released on opam. github.com/tmcgilchrist...

Writing my own DWARF 5 library in OCaml github.com/tmcgilchrist... learning a lot about the spec and how CFI works. Only doing reading at the moment then I’ll tackle writing DWARF.

Shopping for a vintage CRT serial terminal, ideally a DEC VT330 with the lovely orange glow. Need something to hook up to the new benchmarking server. :-)

Experimenting with USDT support in the OCaml runtime and user code. Being able to DTrace and join up OCaml stacks with runtime activity is magical. WIP modifications to OCaml github.com/tmcgilchrist... Of course it works with eBPF but Dtrace has that Solaris cool factor.

Here is a rather lengthy write-up (in English) explaining why I chose #OCaml as my main programming language for my personal and professional projects! xvw.lol/en/articles/... I hope you find this interesting, and I welcome any feedback!

Super excited to have Chris Armstrong talking about OCaml and AWS at FP-SYD tonight.

Wonderful mushroom surprise in my pot plant this morning. Need to lookup what variety it is.

For you Linker and Solaris nerds, the classic Solaris Linking & ELF Blogs are available. Lots of interesting material. www.linker-aliens.org

Hacking Emacs is so rewarding and deeply addictive. I’ve been experimenting with structured navigation using comobobulate and treesitter. Targeting OCaml and Haskell. www.masteringemacs.org/article/comb...

FP-SYD getting started on the topic of SAT solvers.

Of course FP-SYD functional programming group is on tonight. There’s the promise of a SAT talk and a lightning talk. RSVP on www.meetup.com/fp-syd/event...

Also spent some quality time with elisp this weekend improving my Emacs setup with tree-sitter and OCaml. The results are promising, using ocaml-ts-mode plus eglot and ocaml-eglot. I have all the usual LSP goodness plus tree-sitter based navigation built on combobulate.

Why do frame pointers matter for OCaml? I've written up my notes on bringing frame pointers to more platforms. It has been super useful combined with Instruments on macOS, to see exactly what is happening with OCaml programs. lambdafoo.com/posts/2025-0...

Experimenting with OCaml and eBPF. Turns out the basics are there to do interesting things like function counts and GC timings. lambdafoo.com/posts/2025-0...

The curious thing about working on the OCaml compiler is the lag between features getting merged and released. Happily OCaml 5.3 is out and contains some useful performance and debugging improvements. Memory profiling is back with statmemprof, CPU profiling on MacOS works thanks to frame pointers.

Tonight at FP-SYD, we have an OCaml in Production talk by Geoffrey Borough from Axons Talent.

Trying to finish up my work on enabling frame pointers for all OCaml architectures before the end of the year. Why? So we can have nice perf support in OCaml. Currently have amd64 and arm64. RiscV and s390x are in the works.

Dtrace 2024 conference stream is fantastic. Better OCaml support with the recent frame pointers work.

Trying out Bluesky. I’ll be posting things about my work in OCaml and other technical topics. Plus some light content about my hobbies like MTB, surfing and Lego.