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What is a control system anyway?
Hopefully some signal in the noise.
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Catalina is checking notarization of unsigned executables
This is a follow-up to Allan Odgaard's excellent article macOS 10.15: Slow by Design . I want to talk specifically about the first section "Spawning a new Process", because there has been widespread misunderstanding of this. Odgaard provides a simple test to show that the first run of an executable is delayed while…
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BMW Connected Apps Protocol
Stories about my nerd projects
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What's in a Linux Executable?
Executables have been fascinating to me ever since I discovered, as a kid, that they were just files. If you renamed a .exe to something else, you could open it in notepad! And if you renamed somet...
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Running Awk in parallel to process 256M records
TL;DR Awk crunches massive data; a High Performance Computing (HPC) script calls hundreds of Awk concurrently. Fast and scalable in-memory solution on a fat machine.
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API pagination design
Returning all results for a given query could be a challenge for an API, especially if there are thousands of results. It puts a load on a server, on a [...]
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Shell Productivity Tips and Tricks
An introduction to shell productivity features: autocompletion, keyboard shortcuts, history navigation and shell expansions.
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Things I Was Wrong About: Types
I have changed my mind about some topics big and small so far in my life. Today: the value of types for programming.
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Moving my serverless project to Ruby on Rails
Serverless is like a black hole. It promised exciting adventures, but the gravity sucked me in and I spent most of my efforts dealing with its complexity, in...
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What ORMs Have Taught Me: Just Learn SQL (2014)
I’ve come to the conclusion that, for me, ORMs are more detriment than benefit. In short, they can be used to nicely augment working with SQL in a program, but they should not replace it.
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Rust Starter Kit 2020
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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Never use a dependency that you could replace with an afternoon of programming
Never use a dependency that you could replace with an afternoon of programming.
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Why do we need Flask, Celery, and Redis? (2019)
Understanding Flask, Celery, and Redis through Mcdonalds
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Bug #915: Solved
Yesterday I pleaded, Bug #915: please help! It got posted to Hacker News, where Robert Xiao (nneonneo) did some impressive debugging and found the answer.
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Assorted Thoughts on Zig and Rust
I've been using zig for ~4 months worth of side projects, including a toy text editor and an interpreter for a relational language . I've written ~10kloc.
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Programming with Categories
In this course we explain how category theory—a branch of mathematics known for its ability to organize the key abstractions that structure much of the mathematical universe—has become useful for writing elegant and maintainable code. In particular, we'll use examples from the Haskell programming language to motivate…
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Stupid solutions: Live server push without JS
So in my post Is this evil? I covered a way of tracking users with CSS. While thinking about those weird ways of using the web I also started thinking about pushing live data to clients without JS. Or at least maintaining a connection. So WebSockets requires JS. WebRTC requires JS. Even HLS (video streaming), which…
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I made a simple geolocation service
Learn how to create simple Geolocation service without 3rd-party APIs
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SuperRT – Realtime Raytracing on the SNES
Video links for this article: Short trailer Walkthrough and technical details Update 31th May 2021: The source code for SuperRT has now been released. I’m pleased to finally have some results to show for a project I’ve been working on in my spare time for the last year or so. The idea originated when I was trying to…
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Git commit accepts several message flags (-m) to allow multiline commits
Create multiline git commits by using -m multiple times when using git commit
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I'm not feeling the async pressure
An introduction to back pressure in systems and why it matters.
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Double Blind Passwords a.k.a. Horcruxing
Before we get into Horcruxing, here's a quick prologue on online security hygiene. You can skip to the Horcruxing section if it seems redundant. 1. Longer…
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How to write a toy JVM
Exploring JVM specification and trying to write a little code to interpret a Java class like a real JVM.
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The Octo-Bouncer
I started thinking about ball juggling machines in the year 2014. I wrote about my first few attempts at creating them in this blog post from the year 2017. In 2018 I wrote another post about my then newest build. We’re now in the year 2020. And finally, the quest to get a machine to … Continue reading The Octo-Bouncer
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Hallucinations re: the rendering of Cyberpunk 2077
Realtime rendering and videogame programming mostly, but I love computer science and visuals in all their forms. This is a notepad of my ideas.