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The most popular blog posts about systems & performance on Hacker News. 555 posts.
YJIT’s ability to improve performance by adapting to run-time behavior can increase the speed of our code in a way that dropping down to C can’t. As such, I think we should reconsider the common wisdom that “rewriting our Ruby in C” is the ideal path to performance optimization and take a serious look at “rewriting…
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.
Directfs is now the default in runsc. This feature gives gVisor’s application kernel (the Sentry) secure direct access to the container filesystem, avoiding expensive round trips to the filesystem gofer. Learn more about this feature in the following blog that was originally posted on Google Open Source Blog .
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
Usually, SQLite allows at most one writer to proceed concurrently. The BEGIN CONCURRENT enhancement allows multiple writers to process write transactions simultanously if the database is in "wal" or "wal2" mode, although the system still serializes COMMIT commands.
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…
Go 1.21 adds a new port targeting the WASI preview 1 syscall API
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.
Tycho Andersen
How to hash, index, profile, multi-thread, and SIMD your way to incredible speeds.
Neon’s serverless driver redirects the PostgreSQL TCP wire protocol over WebSockets. This makes ordinary, fully-functional PostgreSQL connections accessible from new environments — including serverless platforms like Cloudflare Workers and Vercel Edge Functions. A key feature of these environments is that state is not…
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?
Understanding the OpenSSH CVE-2023-25136 high vulnerability. Read our analysis with Proof-of-Concept, learn what's vulnerable, and discover remediations.
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.
Ever dealt with glitches in a SaaS platform where your actions don't seem to sync up? That's often a transaction isolation issue in databases. Lets talk about transaction isolation and how they work in Postgres, so you can write reliable and performant code with minimal headache.
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.
