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We found an undocumented bug in the Apollo 11 guidance computer code
How a specification surfaced a defect in the Apollo flight code.
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 6,942 posts.
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Over the Air: Exploiting Broadcom’s Wi-Fi Stack
Posted by Gal Beniamini, Project ZeroIt’s a well understood fact that platform security is ...
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Attacking UNIX Systems via CUPS
Hello friends, this is the first of two, possibly three (if and when I have time to finish the Windows research) writeups. We will start with targeting GNU/Lin…
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How Discord Stores Billions of Messages Using Cassandra
Discover the latest news and app updates, stories, company insights, and plenty more about Discord, all in one place.
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%CPU utilization is a lie
I deal with a lot of servers at work, and one thing everyone wants to know about their servers is how close they are to being at max utilization. It should be easy, right? Just pull up top or another system monitor tool, look at network, memory and CPU utilization, and whichever one is the highest tells you how close…
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Replacing Kubernetes with systemd (2024)
In this post I go through the journey of overusing Kubernetes and how systemd can actually do most of what I use it for.
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Linux on an 8-bit micro
Dmitry.GR: A successful experiment in running real Linux on an 8-bit AVR.
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Gentoo on Codeberg
News and information from Gentoo Linux
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The browser's main thread is expensive
What comes to mind when you hear "frontend optimization"? For most of us it's things like reducing network requests, shrinking the bundle,…
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A Love Letter to FreeBSD
I’m still the new person here, learning your ways, stumbling over the occasional quirk, smiling when I find the small touches that make you different. You remind me of what computing felt like before the noise. Before hype cycles and performance theatre. Before every tool needed a plugin system and a logo. You are…
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The weird world of Windows file paths
File system paths on Windows are stranger than you might think. On any Unix-derived system, a path is an admirably simple thing: if it starts with a /, it’s a path. Not so on Windows, which serves up a bewildering variety of schemes for composing a path.
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How Discord stores trillions of messages (2023)
Engineer Bo Ingram shares insight into how Discord shoulders its traffic and provides a platform for our users to communicate.
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FreeBSD doesn't have Wi-Fi driver for my old MacBook, so AI built one for me
My old 2016 MacBook Pro has been collecting dust in a cabinet for some time now. The laptop suffers from a “flexgate” problem, and I don’t have any practical use for it. For quite some time, I’ve been thinking about repurposing it as a guinea pig, to play with FreeBSD — an OS that I’d aspired to play with for a long…
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Standardizing WASI: A system interface to run WebAssembly outside the web
WebAssembly is an assembly language for a conceptual machine, not a physical one. This is why it can be run across a variety of different machine architectures. WebAssembly needs a ...
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Zig builds are getting faster
Andrew Kelley famously (or infamously, depending on your views) said "the compiler is too damn slow, that's why we have bugs." 1
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Clocks for Software Engineers
If you have a software background and you want to pick up digital design,then one of the first things you need to learn about early on is the conceptof the c...
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Linux touchpad like a Macbook: goal worth pursuing?
best seo company australia
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Claude Code Found a Linux Vulnerability Hidden for 23 Years
Claude Code has gotten extremely good at finding security vulnerabilities, and this is only the beginning.
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My business card runs Linux
Dmitry.GR: My business card runs Linux (and Ultrix), yours can too. Details, kits, etc...
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The sad state of Linux Wi-Fi
I've been using 802.11 on Linux now for over a decade, and to be honest, it's still a pretty sad experience. It works well enough that I mostly don't care... but when I care, and try to dig deeper, it always ends up in the answer “this is just crap”.
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Stop using gzip
Everytime you download a tar.gz, Zod kills a kitten. Everytime you generate a tar.gz, well, let's keep this family-safe. In 2015, there s...
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Jepsen: NATS 2.12.1
NATS is a popular streaming system. Producers publish messages to streams , and consumers subscribe to those streams, fetching messages from them. Regular NATS streams are allowed to drop messages. However, NATS has a subsystem called JetStream , which uses the Raft consensus algorithm to replicate data among nodes…
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I designed my own fast game streaming video codec – PyroWave
Streaming gameplay from one machine to another over a network is a reasonably popular use case these days. These use cases demand very, very low latency. Every millisecond counts here. We need to: