Where does JIT-compiled code live? How does Ruby switch between bytecode and native execution? Why does TracePoint slow everything down? This post answers the JIT questions most Ruby developers have but rarely see explained.
Integrating my BM25 pandas search library, SearchArray, into BEIR, in order to embarass myself in public.
How a bit of algorithm engineering and low-level details can alter what seems like a straightforward trade-off on a blackboard.
When defining a type in Inko , it's allocated on the heap by default. For example (using the syntax for the upcoming 0.18.0 release):
It takes time and a lot of skill to write great code, so surely that code is valuable, right? Wrong. You might love it and nurture it, protecting it from harm, but I’m afraid that code of yours is potentially worthless. Why? Read on.
Karl Seguin's Blog - A mix of coding and creative writing
Exploring Lisp's fine-grained type hierarchy.
Optimizing a math expression parser for speed and memory.
Prototype in Marimo, deploy in Bauplan. Learn how to build production-grade pipelines from notebooks with a Python-native stack. No handoffs, no rewrites.
Exploring the math behind hash collisions.
The Personal blog and musings of Chris Penner, a designer, developer and future opsimath.
The first thing I do every time I need to learn a new codebase is to start drawing the UML diagram of its classes, and usually give up soon after I started. The process of doing it manually is certainly useful, but now with reflections I figure it would be fun to try to generate it instead.
How continuous learning shapes effective software development with LLMs
Read about Qodo scores 71.2% on SWE-bench Verified in our blog.
An important requirement to ensure you can fully access your data in cloud apps forever is making the backend sync server available for local self-hosting. That's what EJECTABLE apps are about.
We used to use software; now software started to use us
9 months ago, I took a gander at PG’s guide to Bel . If you haven’t read it, here’s the premise:
Karl Seguin's Blog - A mix of coding and creative writing
TLDR: man pages support links, but man page readers neither display nor allow allow following them.
Computers are starting to have opinions on how our APIs should look like
Recently, I have been testing how well the newest generations of large language models (such as GPT-5 or Claude 4.5) handle natural language, specifically counting characters, manipulating characters in a sentences, or solving encoding and ciphers. Surprisingly, the newest models were able to solve these kinds of…
Last week I had the pleasure of attending RustForge in Wellington, New Zealand. I gave a talk titled “Wild performance tricks”. You can watch a recording of my talk . If you’d prefer to read rather than watch, the rest of this post will cover more or less the same material. The talk shows some linker benchmarks, which…
Release notes for Ghostty 1.1.0, released on January 30, 2025.
We're excited to announce a major architectural improvement to Atuin Desktop: a completely redesigned runbook execution engine.
With the holiday season reaching its apex, we have a few surprises for those of you that have been patiently waiting. The latest release of Dolphin is stuffed with treats. Our first present is presentation - frame presentation, that is. Two new options have arrived and will help users both…
This story is about concurrent data structures in the context of Ruby. The goal here is to demonstrate how true parallelism can be achieved with global mutable state (which at the time of writing, is not supported by built-in Ruby primitives).
From magical to frustrating in months. Why AI coding agents feel like dial-up internet and what ultra-fast inference could unlock for developer productivity.
One story every computing enthusiast should hear is the lesson ofhow loops and tail-recursion are equivalent. We like recursivefunctions because they’re amen...
