happy to announce that, earlier this Fall, our QCE'25 paper "Local Optimization of Quantum Circuits" received a Best Paper award! cs.nyu.edu/~shw8119/25/...

for even more context: Laxman has been exploring the limits of what is possible on single-node parallel machines. This talk is about a recent SPAA paper. They’re getting great scalability up to 8TB on a single node

the famous Nissan Leaf slide returns! Laxman Dhulipala emphasizes the benefits of single-node, shared memory parallelism

one day, my apartment will look like this

Extremely cool work on a mechanically verified garbage collector for OCaml using F* by Sheera Samsu, @kcsrk.info and colleagues at the OCaml Workshop #icfpsplash25

Martin Elsman wraps up the day with Compositional Deep Argument Flattening, a method for summarizing flattening transformations to enable optimizations across compilation unit boundaries

Yanni Lefki (together with Arthur Charguéraud) develop “Binding Boolean Expressions”, a core calculus for generalized pattern matching, guards, and case statements

Samuel Vivien presents his recent work (together with Didier Rémy) on Implicit Modules, an important step towards the long-standing Modular Implicits proposal for OCaml: a way to get the compiler to insert the function you need, automatically

Yong Kiam overviews the design of CakeML and all of the successes of the project over the years!

Viviana Bono tackles representing structured knowledge databases as CDuce types www.cduce.org

Wenhao Tang motivates “Freezing Bidirectional Typing”, a new type inference scheme with some cool 🧊 and spooky 👻 features

Mizuki Arata presents LunarML — an impressive implementation!! It compiles standard ML down to either Lua or JavaScript. Tons of features. Check it out! github.com/minoki/LunarML

John presents new compiler optimization work inside of SML/NJ —

Dave is up! Calling in all the way from the Oregon coast

you can follow the live feed here: www.youtube.com/live/8B4VrU_...

the ML Family Workshop begins in just a few hours! Come find us in Peony NE at 10:30, right next to the dining hall We have a great program with 9 talks! If you are curious about compilers, type systems, module systems, formal proofs, and typed domain modeling, then this is the place for you

in TypeDis (conditionally accepted at POPL!), we develop a type system for enforcing **disentanglement** statically at compile-time. This project was led by Alexandre Moine here at NYU, in close collaboration with Stephanie Balzer at CMU.

Excited to say that we're looking to hire someone to focus on OxCaml education! We're doing enough to change the language that we have a pretty big internal education task ahead of us, and we want to hire someone to focus on it! Please share this with others! www.janestreet.com/join-jane-st...

And if you’re interested in OxCaml, we have a tutorial on Sunday at ICFP walking through it conf.researchr.org/track/icfp-s... (materials will be online for anyone afterwards. Just the minor detail of finishing writing them first)

absolutely thrilled to announce 2 papers (conditionally) accepted at POPL! TypeDis: A Type System for Disentanglement (Moine, Balzer, Xu, Westrick) All for One and One for All: Program Logics for Exploiting Internal Determinism in Parallel Programs (Moine, Westrick, Tassarotti)

parallel Boyer-Moore majority selection is a nice bit of code; here it is in MaPLe. this algorithm seems to be folklore -- the original Boyer-Moore algorithm is sequential, but I've found at least two mentions of the parallel algorithm in the wild: ⬇️

Looking over this paper today about parallel incremental convex hull: www.cs.ucr.edu/~yihans/pape... An interesting connection from computation geometry is that 2D Delaunay triangulations can be computed as a special case of 3D convex hulls...

goals

👀 👀 Singapore here I come! @icfp-conference.bsky.social

another ML Family Workshop 2025 update! Happy to announce that Yong Kiam Tan (tanyongkiam.github.io) will give an invited talk, titled: From CakeML to Proof Checking, and Back Again See the full program here: conf.researchr.org/home/icfp-sp...

ICFP/SPLASH attendees: what's the first thing you're doing in Singapore this October?? my goal: try every single dish on this list 👀 👀 conf.researchr.org/attending/ic... (courtesy of @ilyasergey.bsky.social !)

when I first moved to NYC I started making two lists — places to go, and places I’ve been 🚶🏼‍♂️ now, almost exactly a year later, I’ve been to ~250 places and counting love this city… so much to see

came across this nice writeup for managing uninstalls on Unix-like systems, especially for packages that don't provide any sort of `make uninstall` target: gist.github.com/ruario/a3605...

happy to announce that we have 8 accepted submissions for the ML Family Workshop this year! 🎉 Topics include type systems, type-guided domain modeling, compilers IRs and optimization, module systems, successor MLs, and scripting languages. Check it out! conf.researchr.org/home/icfp-sp...

ICFP/SPLASH 2025 registration is open! If you register soon, you can catch the early registration discount (by August 31). Register for the whole 7 days and only pay for 6! conf.researchr.org/attending/ic...

whoops, committed git sins and merged main into feature branch

aha! so, on apple silicon, it turns out that STP can greatly hinder the performance of store-to-load forwarding, and apple explicitly recommends using single-register stores and loads in tight loops...

Alright so here we have two versions of the same loop, compiled on ARM. The loops are identical except for the spilled locations for temps x10 and x11. On the left, they are non-adjacent (see: two `str` near bottom). On the right, they happen to be adjacent (see: `stp`)

oof, yep, looks like the (seemingly unrelated) compiler optimization somehow caused a temporary to be reassigned from register to stack, with ~20% additional spilling cost

Continuing my mission to feed traveling PhD students Banh Mi in NYC, I had a great time chatting about OCaml and open source with Joe. Joe was one of my favorite speakers at NYC Systems so far. Make sure to check out his talk on youtube!

Upstate NY folks: Cornell will be hosting Upstate PL (www.cs.cornell.edu/upstate-pl/) on Thursday, August 28th. You should come if you're in the area! Talk proposals are due August 4th, registration closes August 18th.

PSA! Please share around! Due to a limited number of submissions, we're extending the OCaml Workshop deadline by a week to July 10th AoE! Functional programmers! Heed my call! We need your submissions!!

🚨 Call for Volunteers: SPLASH/ICFP 2025 🚨 Join the team that makes it all happen! Meet the PL community, attend for free, and help run an amazing conference. Apply now 👉 tinyurl.com/splashifcp25... More info 👉 conf.researchr.org/track/icfp-s...

And to conclude this year's tweets, here is a brief announcement about next year's PLDI! PLDI 2026 will take place in the beautiful 🏔️ Boulder, Colorado 🏔️. We will see you all there! The website is already up (pldi26.sigplan.org) so stay tuned for more updates!

the ICFP 2025 program is coming together! Check out our list of accepted papers: icfp25.sigplan.org/track/icfp-2... and we'll have three keynotes this year! icfp25.sigplan.org/track/icfp-2... ⬇️⬇️⬇️

Some more exciting news! This year we had not one, but two(!) dissertations receiving the SIGPLAN John C. Reynolds Doctoral Dissertation Award at PLDI! The awardees are: Harrison Goldstein from the University of Pennsylvania and Rachit Nigam from Cornell University. More info ⬇️

Last but not least, the SIGPLAN Robin Milner Young Researcher Award was also announced at PLDI. This year, the award went to Işıl Dillig ( @idillig.bsky.social ), whose research has had profound and far-reaching contributions to program analysis, verification, and synthesis ⭐️

If you are a functional programmer in Asia, then it is your obligation, nay your existential imperative to submit to the OCaml workshop this year SPLASH/ICFP is in Asia this year and we have fewer submissions from the western folks because of the distance Submit!!! Plsplsplsplsplz

The 2nd Programming for the Planet workshop will be hybrid and co-located with ICFP/SPLASH in October in Singapore! Our call for papers is out at conf.researchr.org/home/icfp-sp..., submission deadline 3rd July 2025.

We've extended the deadline for the ML Family Workshop -- please help spread the word! New deadline: July 3 If you (or someone you know) is planning to attend ICFP/SPLASH, we encourage you to consider submitting! conf.researchr.org/home/icfp-sp...

taking a go at oxcaml today first attempt: let's try a parallel reduction. Idea is to compute the "sum" of [f(lo), ..., f(hi-1)] in parallel, combining via some associative function g (and corresponding zero element, z).

hey oxcaml folks -- I'm trying to follow the tutorial (oxcaml.org/documentatio...) but getting issues like `Error: Unbound module Parallel_scheduler_work_stealing`. Is there self-contained MWE available somewhere? I feel like I'm probably just missing an opam or dune incantation

It's submission day for ML Family Workshop 2025! conf.researchr.org/home/icfp-sp...

excited that my team at Bloomberg is supporting PhD students in certified programming (and other infra/sec topics too!) through a fellowship. 💻🛡️ includes stipend, tuition, and internship. timely for Rocq and proof assistant folks as science funding tightens. please apply by July 18th! 📬

OxCaml SIMD primitives are looking really nice 👀 > [unboxed vector values] are passed between functions in XMM registers, stored in structures as flat data, … > Within a function, all SIMD vectors live in floating-point registers or 16-byte aligned stack slots. oxcaml.org/documentatio...