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An introduction to RabbitMQ
What is RabbitMQ? Find out about this open-source message broker in our introduction to the powerful Message Queue tech.
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 6,936 posts.
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Make LLVM Fast Again
Clang is an “LLVM native” C/C++/Objective-C compiler, which aims to deliver amazingly fast compiles […]
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Lepton image compression: saving 22% losslessly from images at 15MB/s
Dash knows your context, your team, and your work, so your team can stay organized, easily find and share knowledge, and keep projects secure, all from one place.
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Why xor eax, eax?
Why do compilers love xor-ing registers so much?
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Docker in Production: A History of Failure
Introduction My first encounter with docker goes back to early 2015. Docker was experimented with to find out whether it could benefit us. At the time it wasn’t possible to run a container [i…
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Postgres LISTEN/NOTIFY does not scale
Learn why Postgres LISTEN/NOTIFY doesn't scale for high-throughput use cases and what architectural alternatives Recall.ai uses in production.
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Dissecting the Apple M1 GPU, Part II
Less than a month ago, I began investigating the Apple M1 GPU in hopes of developing a free and open-source driver. This week, I’ve reached a second milestone: drawing a triangle with my own open-source code. The vertex and fragment shaders are handwritten in machine code, and I interface with the hardware via the…
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Inserting a billion rows in SQLite under a minute
This is a chronicle of my experiment where I set out to insert 1B rows in SQLite
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Asahi Linux 7.1 Progress Report
Porting Linux to Apple Silicon
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Teleforking a Process onto a Different Computer
One day a coworker mentioned that he was thinking about APIs for distributed compute clusters and I jokingly responded “clearly the ideal API would be simply calling telefork() and your process wakes up on every machine of the cluster with the return value being the instance ID”. I ended up captivated by this idea: I…
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MLow: Meta's low bitrate audio codec
At Meta, we support real-time communication (RTC) for billions of people through our apps, including WhatsApp, Instagram, and Messenger. We are working to make RTC accessible by providing a high-q…
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Linux/4004: booting Linux on Intel 4004 for fun, art, and no profit
Dmitry.GR: Slowly booting full Linux on the intel 4004 for fun, art, and absolutely no profit
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BitLocker Lockscreen Bypass
BitLocker is a modern data protection feature that is deeply integrated in the Windows kernel. It is used by many corporations as a means of protecting company secrets in case of theft. Microsoft recommends that you have a Trusted Platform Module which can do some of the heavy cryptographic lifting for you.
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Building the fastest Lua interpreter automatically
This is Part 1 of a series of posts. Part 2 is available here: Building a baseline JIT for Lua automatically It is well-known that writing a good VM for a dynamic language is never an easy job. High
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Every 7.8μs your computer’s memory has a hiccup
I was particularly interested in one of the consequences of how dynamic RAM works. You see, each bit of data is stored by the charge (or lack of it) on a tiny capacitor within the RAM chip. But these capacitors gradually lose their charge over time.
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Speed Is the Killer Feature
Teams consistently overlook speed. Instead, they add more features (which ironically make things slower). Products bloat over time and performance goes downhill.
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M4 Mac mini's efficiency
I had to pause some of my work getting a current-gen AMD graphics card running on the Pi 5 and testing a 192-core AmpereOne server to quickly post on the M4's efficiency. I expected M4 to be better than M1/M2 (I haven't personally tested M3), and I hoped it would at least match the previous total-system-power…
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How Figma's databases team lived to tell the scale
Our nine month journey to horizontally shard Figma’s Postgres stack, and the key to unlocking (nearly) infinite scalability.
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IOS 5's "Cleaning" Behavior
(Screenshot by someone on Twitter two weeks ago. I can’t find the tweet now — sorry.)
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The Raspberry Pi 4 needs a fan
December 2020 Update: Lo and behold, the Pi Foundation tacitly acknowledges the Pi needs a fan in the official case, because now they sell the Case Fan! The Raspberry Pi Foundation's Pi 4 announcement blog post touted the Pi 4 as providing "PC-like level of performance for most users". The Foundation even offers a…
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Undocumented Catalina file access change
It's well known that if you drag a file from Finder and drop it into Terminal, the full path of the file will output in Terminal. The same behavior occurs with copy and paste too. This has always been a very convenient but innocuous operation… until macOS 10.15 Catalina. I've discovered that on Catalina, pasting a…
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Changing std:sort at Google’s scale and beyond
TL;DR; We are changing std::sort in LLVM’s libcxx. That’s a long story of what it took us to get there and all possible consequences, bugs you might encounter with examples from open so…
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Executable Is a SQLite Database
I have been probably obsessed with two things in the last few years: Nix as a tool to explore innovative ideas that require the capability to rebuild the world and replacing ELF with SQLite as an executable format. You might have noticed that these two ideas are well suited to each other.