The latest blog posts to take off on Hacker News. 1,423 posts.
I was reading the metr article on how llm code passes test much more often than it is of mergeable quality . They look at the performance of llm s doing programming when the success criterion is “passes all tests” and compare it to when the success criterion is “would get approved by the maintainer”. Unsurprisingly…
Dolphin started out as a GameCube emulator in 2003. In 2008, experimental Wii support was added. And now, in 2026, Dolphin enters the realm of arcade emulation with support for the Sega, Namco, and Nintendo arcade effort, the Triforce, finally arriving. Want to learn more about the Triforce? Check out our deep dive…
We build a computer inside a transformer — executing arbitrary C programs for millions of steps with exponentially faster inference via 2D attention heads.
Erlang's mailbox design is more disciplined than Go's channels: only the owning process can read from a mailbox, and sends are asynchronous. Yet the four failure modes of shared mutable state still show up, just in different shapes.
Quint - Executable specs for reliable systems
I love a good side-project. Like most geeks, I have a tendency to go down rabbit holes when faced with problems - give me a minor inconvenience and I’ll happily spend weeks building something far more elaborate than the situation warrants. There’s joy in having a playground to explore ideas and “what ifs”; Building…
We find that roughly half of test-passing SWE-bench Verified PRs written by recent AI agents would not be merged into main by repo maintainers. A naive interpretation of benchmark scores may lead one to overestimate how useful agents are without more elicitation or human feedback.
How Go 1.26's source-level inliner works, and how it can help you with self-service API migrations.
JavaScript's Date object has been a source of bugs for three decades. Temporal, which just reached Stage 4, is a modern replacement with immutable types, first-class time zone and calendar support, and nanosecond precision. This is the story of how Bloomberg, Igalia, and the TC39 community spent nine years turning…
This one is going to be a quick one as there wasn't anything new discovered. In fact, I feel quite dumb. This is really a tale of " Do your research before acting and know what your goal is, " as you'll end up saving yourself a lot of time. Nobody likes throwing away work they've done either, and there could be…
When Mathematica seems to not to know how to simplify an expression, it may be doing the right thing, being more sophisticated than you expect.
C++26 brings us a small but meaningful cleanup to the language: deprecating ellipsis parameters without a preceding comma. This change, proposed in P3176R1, aims to improve C compatibility, reduce confusion, and pave the way for future language features. The proposal’s name is a playful reference to the Oxford comma …
This post is an expanded version of a presentation I gave at the recent WebAssembly CG meeting in Munich. WebAssembly has come a long way since its first release in 2017. The 1.0 version of WebAssembly was already a great fit for low-level languages like C and C++, and immediately enabled many new kinds of…
A programmer's text editor is their castle
This page contains entries for the year 2026 . Other years are available in the Devlog archive page .
Python loses every public benchmark by 21-875x. I took the exact problems people use to dunk on Python and climbed every rung of the optimization ladder -- from CPython version upgrades to Rust. Real numbers, real code, real effort costs.
Over the course of four weeks in January and February, I built a new programming language using Claude Code. I named it Cutlet after my cat. It’s completely legal to do that. You can find the source code on GitHub , along with build instructions and example programs .
Turing Award winner and former Oxford professor Tony Hoare passed away last Thursday at the age of 92. Hoare is famous for quicksort, ALGO...
I read Ian Whitlock’s article on why he can’t quit Magit and it inspired me to share more about Magit from my perspective. This article will focus on rebasing.
AI's coding ability is outpacing our ability to wield it effectively. That gap closes in levels — 8 of them. Here's the progression from tab complete to autonomous agent teams.
Rahul's Blog
Limousin, Saint-Yrieix-la-perche, Périgord, Université, société, Livres, citations, Nantes, Jumilhac
I touched "every" OS so you don't have to
Literate programming is the idea that code should be intermingled with prose such that an uninformed reader could read a code base as a narrative, and come away with an understanding of how it works and what it does. Although I have long been intrigued by this idea, and have found uses for it in a couple1 of different…
I built a tiny programming language where programs are candy grids, complete with a renderer, photo decoder, AST tree, and execution trace.
AI coding is blurring the lines between engineers, PMs, and designers. In the short-term, it's going to cause havoc. What happens long-term?
It’s looking like I’m going to need to build a reactive engine for work, so I’m going to prepare for that by writing down what I know about them. I want to look at three ways of building reactive engines: push reactivity, pull reactivity, and the hybrid push/pull combination that is used in a bunch of web frameworks…
