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The most popular blog posts about systems & performance on Hacker News. 391 posts.
Overview Edit: this post was discussed on hacker news Some of the comments contained valuable reviews of the C code listed below. I’ve appended some edits after the original listing. I’ve been working quite with files and file systems on Linux recently. Mostly from the vantage point of either a shell or a python…
Using NixOS for a more tractable computing setup.
I recently came home to visit with family, but right now as I write this, it's 1:00am and I'm running memtest86+ by myself in the basement.
This post is about building an FPGA based networked key-value-store in the functional hardware description language Clash. I’ll describe my FPGA-tailored hashtable design, the testing framework I built for it, and its performance and resource usage.
This is a complete tutorial for understanding the basics of Linux ext4 file system.
Xe Iaso's personal website.
Digs into a unexpected memory leak when using Zig's FixedBufferAllocator
So after several years of reading oversimplified and flat out incorrect comments about threads and fibers/goroutines/async/etc and fighting this reaction: I’ve decided to write my own still-over-simplified all in one guide to the difference between a couple popular threads and fiber implementations. In order to…
The price of Solid-state drives (SSDs) has dropped significantly over the last few years. It's now possible to buy a 1TB solid-state drive for less than €60. However, at such low price points, there is a catch.
My personal website and blog
A guide on building a tiny Linux (only 789 KB) that requires no MMU and deploying it on a RISC-V system, with custom userspace code.
How to hash, index, profile, multi-thread, and SIMD your way to incredible speeds.
A retrospective on a few months of working on a graduate degree in computer science.
An "amateur hour" Javascript bug is self-DDOSing Twitter, sending infinite requests from users related to — or possibly even causing — Elon Musk's "temporary emergency measures" to stop web scraping.
Two systems I know pretty well, Apache BookKeeper and Apache Kafka, were designed in the era of the spinning disk, the hard-drive or HDD. Hard-drives are good at sequential IO but not so good at random IO because of the relatively high seek times. No wonder then that both Kafka and BookKeeper were d
If I give a programmer a string such as "9223372036854775808" and I ask them to convert it to an integer, they might do the following in C++: std::string s = .... uint64_t val; auto [ptr, ec] = std::from_chars(s.data(), s.data() + s.size(), val); if (ec != std::errc()) {} // I have an error ! // val … Continue reading…
You're probably reading this page because you've attempted to access some part of my blog (Wandering Thoughts) or CSpace , the wiki thing it's part of. Unfortunately you're using a browser version that my anti-crawler precautions consider suspicious, most often because it's too old (most often this applies to versions…
Where would you set the default call handler for macOS? And where in System Settings do you set the default web browser?
In this article I will take a look at the classic concurrent ring buffer and how it can be optimized to increase throughput.
I'm joev, a security engineer 👋 You may know me from my work at Apple or on Metasploit, or from my CVEs.
A small Figma war story.
Since the change of year, I’ve been using Alpine Linux on my main computing device (a new desktop PC that I assembled in December). These are some notes on in, some niceties and caveats.
Since this article contains a lot of interactive demos relying on fairly modern browser technology, let's make sure that everything is OK before continuing.
Another guest post by @NeoMoevius from Twitter. Same as earlier with the Native Urban Terror on FreeBSD article. This time it will be about setting up Home Audio Studio on a FreeBSD 13.1 system. Th…
In this article we will learn how to deploy Keycloak with PostgreSQL on Kubernetes. We will first do everything manually with separate YAMLs and then later with Helm. Our k8s environment will run i…
This function doesn't know the value being multiplied until it is called. The compiler (gcc, O2) emits a generic integer multiply instruction in its loop body.
This is the fastest Arm desktop in the world, yes, even faster than the M2 Ultra Mac Pro. And today, I made it even faster. I upgraded everything: Faster RAM, 128 core CPU, 40 series GPU, I did it all, and we'll see how much we can obliterate the M2 Mac Pro. 128 cores—that's five times more cores, I'm also going to…
Elixir was built on Erlang. Erlang was built to provide "consistently low latency" and a few other audacious goals. Note, this is not a hard realtime constraint. It is soft, squishy and yet, important and real. It makes Erlang unusually suitable to systems where latency matters and where a near-realtime experience is…
A lightweight in-process SQL OLAP engine, powered by ClickHouse.
Apple has just released the first of its new Rapid Security Responses (RSRs) for macOS 13.3.1 Ventura. This is indicated as macOS Rapid Security Response 13.3.1 (a), and is just just over 300 MB to…
