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How memory maps (mmap) deliver faster file access in Go
Learn how memory maps (mmap) accelerate file I/O, reduce latency, and improve app performance in Unix and Go with real-world benchmarks.
New
The latest blog posts to take off on Hacker News. 1,748 posts.
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A bug that taught me more about PyTorch than years of using it
a loss plateau that looked like my mistake turned out to be a PyTorch bug. tracking it down meant peeling back every layer of abstraction, from optimizer internals to GPU kernels.
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How I stopped worrying and started loving the Assembly
Or why robots are playing DOOM now
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Context engineering is sleeping on the humble hyperlink
The dream of hypermedia can come to fruition in a world where clients can not only parse, but navigate with intent.
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Casey Muratori: I can always tell a good programmer in an interview
How to reliably understand if a candidate is a good programmer, inspired by Casey Muratori
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I spent a year making an ASN.1 compiler in D
In this post I’ll just rambling about ASN.1; parts of the compiler implementation, and some of the tool’s output rather than the tool itself as its still too WIP to really advertise on its own yet.
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Harder, Better, Faster, Stronger Version of Uber H3 in Rust
Since this article will probably have more reach than my usual rambling, It'll be written in English (but let's not make a habit of it).
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Corrosion
Corrosion is distributed service discovery based on Rust, SQLite, and CRDTs.
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PyTorch Monarch
We now live in a world where ML workflows (pre-training, post training, etc) are heterogeneous, must contend with hardware failures, are increasingly asynchronous and highly dynamic. Traditionally, PyTorch has relied...
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Programming with Less Than Nothing
Lambda calculus is for wimps. Real programmers use combinatory logic.
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Clojure Zippers (2021)
In this article, we will discuss zippers in the Clojure language. These are an unusual way to work with collections. Using a zipper, you can traverse a data structure arbitrarily and modify its content as well as search in it. A zipper is a powerful abstraction that pays off over time. However, it is not as…
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Why SSA?
If you’ve read anything about compilers in the last two decades or so, you have almost certainly heard of SSA compilers , a popular architecture featured in many optimizing compilers, including ahead-of-time compilers such as LLVM, GCC, Go, CUDA (and various shader compilers), Swift 1 , and MSVC 2 , and just-in-time…
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Django 6.0 beta 1 released
Posted by Natalia Bidart on Oct. 22, 2025
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I see a future in jj
In December of 2012, I was home for Christmas, reading Hacker News. And that’s when I saw “ Rust 0.5 released ."" I’m a big fan of programming languages, so I…
375
SATisfying Solutions to Difficult Problems
This post covers the same material as my !!Con 2024 talk , for which the slides are here .
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Cryptographic Issues in Cloudflare's Circl FourQ Implementation (CVE-2025-8556)
The vulnerabilities we found in Cloudflare's CIRCL FourQ implementation: invalid-point attacks, Edwards-curve edge cases, and the disclosure that fixed them.
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Designing software for things that rot
Building an iOS fermentation tracker with HACCP-style decision trees for home charcuterie, salami curing, and fermented foods - food safety without internet strangers.
378
Magit Is Amazing
I was reading a post about Jujutsu version control system the other day and that just made me realize how awesome is Magit!
379
Build your own database
A step-by-step guide to building a key-value database from scratch.
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Language Support for Marginalia Search
One of the big ambitions for the search engine this year has been to enable searching in more languages than English, and a pilot project for this has just been completed, allowing experimental support for German, French and Swedish. These changes are now live for testing, but with an extremely small corpus of…
382
Should LLMs just treat text content as an image?
Several days ago, DeepSeek released a new OCR paper. OCR, or “optical character recognition”, is the process of converting an image of text — say, a scanned…
383
Building a message queue with only two UNIX signals
Have you ever asked yourself what if we could replace any message broker with a very simple one using only two UNIX signals? Well, I'm not surprised if you
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The death of thread per core
Programming language async runtimes are very focused on handling asynchronous, possibly long running tasks, that might yield for a variety of reasons, that...
385
Claude Code on the web
Today, we're introducing Claude Code on the web, a new way to delegate coding tasks directly from your browser. Now in beta as a research preview, you can assign multiple coding tasks to Claude that run on Anthropic-managed cloud infrastructure, perfect for tackling bug backlogs, routine fixes, or...
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Getting DeepSeek-OCR working on an Nvidia Spark via brute force with Claude Code
DeepSeek released a new model yesterday: DeepSeek-OCR, a 6.6GB model fine-tuned specifically for OCR. They released it as model weights that run using PyTorch and CUDA. I got it running …
387
BERT is just a single text diffusion step
A while back, Google DeepMind unveiled Gemini Diffusion, an experimental language model that generates text using diffusion. Unlike traditional GPT-style models …
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Forth: The programming language that writes itself
An exploration of the evolution and meaning of the Forth programming language and its context in history.
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Improving PixelMelt's Kindle Web Deobfuscator
A few days ago, someone called PixelMelt published a way for Amazon's customers to download their purchased books without DRM. Well… sort of. In their post "How I Reversed Amazon's Kindle Web Obfuscation Because Their App Sucked" they describe the process of spoofing a web browser, downloading a bunch of JSON files…