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Programming Deflation
When Code Gets Cheaper Every Day
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The latest blog posts to take off on Hacker News. 14,537 posts.
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A dumb introduction to z3
Exploring the world of constraint solvers with very simple examples.
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Which NPM package has the largest version number?
I spent way too much time on this
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Writing an operating system kernel from scratch
Exploring a minimal implementation of a time-sharing kernel on RISC-V, implemented in Zig, on top of OpenSBI.
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Safe C++ proposal is not being continued
One year ago, the Safe C++ proposal was made. The goal was to add a safe subset/context into C++ that would give strong guarantees (memory safety, type safety, …
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RIP pthread_cancel
I posted about adding pthread_cancel use in curl about three weeks ago, we released this in curl 8.16.0 and it blew up right in our faces. Now, with #18540 we are ripping it out again. What happened? short recap pthreads define “Cancelation points”, a list of POSIX functions where a pthread may be cancelled. In…
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How Container Filesystem Works: Building a Docker-Like Container from Scratch
Learn how Linux containers are built from the ground up. Starting with the mount namespace and a root filesystem, see why PID, cgroup, UTS, and network namespaces naturally follow - and how this foundation makes concepts like bind mounts, volumes, and persistence in Docker or Kubernetes much easier to grasp.
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My first impressions of Gleam
What I’ve learned in my first few hours using Gleam for a small project.
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AI coding
In my old age I’ve mostly given up trying to convince anyone of anything. Most people do not care to find the truth, they care about what pumps their bags. Some people go as far as to believe that perception is reality and that truth is a construction. I hope there’s a special place in hell for those people.
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Java 25's new CPU-Time Profiler
Learn all about Java 25's new CPU-time profiler and why it matters in this weeks blog post from the creator himself.
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I used standard Emacs extension-points to extend org-mode
Recently I read this beginners guide to extend Emacs. The guide is perfect for starting out with elisp and it shows a lot of care in teaching how to interact with Emacs.
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UTF-8 is a brilliant design
Exploring the brilliant design of UTF-8 encoding system that represents millions of characters while being backward compatible with ASCII
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A beginner's guide to extending Emacs
How to build a custom completion backend for emacs from scratch.
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Crates.io phishing attempt
Earlier this week, an npm supply chain attack. It’s turn for crates.io, the main public repository for Rust crates (packages). The phishing e-mail looks like this: And it leads to a GitHub login pa...
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Many hard LeetCode problems are easy constraint problems
Use the right tool for the job.
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Death to type classes
Death (XIII) Symbolizes significant change, transformation, and endings, rather than literal physical death. Have you ever seen a Number grazing in the f
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PythonBPF – Writing eBPF Programs in Pure Python
I brag about my newest obsession.
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Rails on SQLite: new ways to cause outages
This post was originally given as a talk for Friendly.rb and Kaigi on Rails. The slides are also available. Between Litestack and the Rails 8 trifecta of Solid Cable, Solid Cache, and Solid Queue, it’s easier than ever to spin up a Rails app that doesn’t need a database service, or a redis service, or a file storage…
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Claude’s memory architecture is the opposite of ChatGPT’s
A breakdown of Claude's memory implementation, how it differs from ChatGPT, and what these opposite approaches reveal about each company's philosophy.
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Conway's Game of Life, but musical
Breed unique melodies with genetic algorithms! Explore Conway's musical life and cultural evolution patterns. Interactive AI music lab
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Hypervisor in 1k Lines
Write your first hypervisor from scratch, in 1K LoC.
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How to use Claude Code subagents to parallelize development
Updated 2026-07-10 for the agent-teams era. Originally published September 2025. A subagent in Claude Code is a separate agent your session spawns to do a...
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Weird CPU architectures, the MOV only CPU (2020)
I like CPU architectures, especially weird, interesting and unusual ones. For example, the Intel iAPX 432 is still something I would love to play around with. Recently, I realized that a working CPU can be made with just a simple Move instruction. For this to work, everything needs to be memory mapped. The ALU…
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Strong Eventual Consistency – The Big Idea Behind CRDTs
Missing the Forest for the Sequence Trees.
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Writing code is easy, reading it isn't
Writing code is easy. Once you have a solution in mind, and have mastered the syntax of your favorite programming language, writing code is easy. Having an LLM write entire functions for you? Even eas
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A critique of package managers
n.b. This is a written version of a dialogue from a YouTube video: 2 Language Creators vs 2 Idiots | The StandupPackage managers (for programming languages) are evil.11 The term “evil” is being used partially hyperbolic to make a point.To start, I need to make a few distinctions between concepts a lot of programmers…
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The Helix Text Editor (2024)
I’ve come to accept that I’m just a sucker for shiny nerd things. I use Rust, despite never having had a professional reason to use it in my life. I switched to Linux in my student years and I’ve never looked back since, even though it constantly breaks and I can’t get my Bluetooth headphones to connect. I have a…
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Hashed sorting is typically faster than hash tables
Benchmarks and theoretical explanation of why and when hashed radix sort beats hash tables.
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Using Claude Code to modernize a 25-year-old kernel driver
As a bit of background, one of my hobbies is helping people recover data from old tape cartridges, such as QIC-80 tapes, which were a rather popular backup medium in the 1990s among individuals, small businesses, BBS operators, and the like. I have a soft spot for tape media; there’s something about the tactile…