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Topics /
Software Engineering
The most popular blog posts about software engineering on Hacker News. 14,544 posts.
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Allocators in Rust
There has been a lot of discussion lately about Rust’s allocator story, and in particular our relationship to jemalloc. I’ve been trying to catch up, and I wanted to try and summarize my understanding and explain for others what is going on. I am trying to be as factually precise in this post as possible. If you see a…
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Control, escape, and meta tricks
Open a Unix or Linux terminal emulator. If you have Terminal.app on macOS, ensure that the "Use Option as Meta Key" option is enabled in its "Preferences" section. Now type foo bar baz followed by meta + b (i.e. alt + b or option + b on modern keyboards). In a typical desktop environment with a typical and modern…
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Hypervisor in 1k Lines
Write your first hypervisor from scratch, in 1K LoC.
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Write Yourself a Haskell in Lisp
For me, the best way to understand something is usually to implement it myself. So when I first started getting serious about Haskell, I implemented (in Common Lisp) a simple lazy functional programming language that used graph rewriting for the interpretation. Then, years later, I mentioned this implementation in a…
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Vim Koans
These koans have been independently translated into Chinese (archived) , thanks to Wanzhang Sheng, and into Spanish (archived) , thanks to Daniel Campoverde Carrión.
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Commit Graph Drawing Algorithms
This article is one chapter of my master thesis entitled “Design and implementation of a graphical user interface for git”. It describes the algorithm I designed to draw the commit graph in my own prototype git client called gitamine. I have adapted the content so that it fits better with this blog. Drawing graphs is…
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Adventures in the land of substrings and RegExps
Few weeks ago a bug was filed against Dart SDK citing "very low performance of String.substring " . Here is a core of microbenchmark developer submitted together with the issue:
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Go on Very Small Hardware
How low we can Go and still do something useful? I recently bought this ridiculously cheap board: I bought it for three reasons. First, I have never dealt (as a programmer) with STM32F0 series. Second, the STM32F10x series is getting old. MCUs belonging to the STM32F0 family are just as cheap if not cheaper and has…
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LLVM Internals: The Bitcode Format
I’ve done a couple of posts on LLVM itself, mostly on things you can do with LLVM or how LLVM represents particular program features.
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Personal Notes on Corman Lisp 3.1 Release
Today, as I announced earlier, the Corman Lisp 3.1 has been released after more than a decade-long break. Somehow it happened that I am one of the active mai...
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What Makes the Zig Programming Language Unique?
Zig lets you run code during compilation. What are the implications?
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Raytracing won't simplify AAA real-time rendering
Realtime rendering and videogame programming mostly, but I love computer science and visuals in all their forms. This is a notepad of my ideas.
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Big Tech Killed the Golden Age of Programming
This post was part of an experiment. It was largely generated by AI, and does not reflect my views. Please see the post How I Tricked Hacker News and Made The Front Page with AI Slop for details! The
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This isn’t the way to speed up Rust compile times
Xe Iaso's personal website.
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Better Than JSON?
You are seeing this because the administrator of this website has set up Anubis to protect the server against the scourge of AI companies aggressively scraping websites . This can and does cause downtime for the websites, which makes their resources inaccessible for everyone.
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OCaml is Pretty Great (2019)
But OCaml is Pretty Great
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Killing the C++ Modules Technical Specification
In my previous post, I mentioned that have serious issues with the current Modules TS as it is written. I have wanted to say more on the subject since my tweets, posts, and general comments are missing quite a bit of context for why I think the implementation is wrong and will be more trouble than it is worth.
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Stop crawling my HTML – use the API
One of the (many) depressing things about the "AI" future in which we're living, is that it exposes just how many people are willing to outsource their critical thinking. Brute force is preferred to thinking about how to efficiently tackle a problem. For some reason, my websites are regularly targetted by "scrapers"…
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Things from Python I'd miss in Go
Let's assume Go has one killer feature – cheap concurrency – not present in any other language with similar serial performance (ruling out say Erlang). And let's agree that it gives Go its perfect niche – and we're only discussing uses of Go outside that niche from now on. So we won't come back to concurrency till the…
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# [derive(Clone)] Is Broken
Not just `#[derive(Clone)]`, but all of the standard trait derives are
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Inventing Monads
I got into a discussion about monads recently. On a search to find some resources to share, I realized that most essays explained them with type signatures and rules. A missing ingredient to grok them, I think, is to understand the intuition behind them. How could you end up inventing monads?
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A guide to Gen AI / LLM vibecoding for expert programmers
I get it, you’re too good to vibe code. You’re a senior developer who has been doing this for 20 years and knows the system like the back of your hand. Or maybe you’re the star individual contributor who is the only person who can ever figure out how to solve the hard problems. Or maybe you’re the professor who…
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Jujutsu worktrees are convenient (2024)
Jujutsu worktrees are very convenient! In git, worktrees are an old concept. The idea is that you can effectively work on your project in 2 different folders …