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Bbtree: Fastest Ordered Map
How bbtree, a drop-in replacement for std's BTreeMap, cuts cache misses, instructions and cache coherence traffic, and how it is kept correct.
New
The latest blog posts to take off on Hacker News. 1,420 posts.
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Decompiling Fast Food Tycoon 2: Drawing the World
How a 2001 business sim rendered its rich and detailed cities.
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How close can pure functional programming get to C?
In Why Lean is Faster Than Rust , the author shares an impressive result: a DEFLATE compression library written in Lean 4 , a functional programming language and proof assistant, outperforming an equivalent Rust package that crates.io says has been downloaded over a billion times. From the article:
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UUIDv7: Timestamps aren’t time-ordered and other oddities
When timestamps aren’t time-ordered and other oddities
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Gemma-4-26B-A4B with 39-69% less thinking at same accuracy
This is the fifth model in the ThinkingCap series. We reduced how much Google's gemma-4-26B-A4B-it thinks, without compromising the quality of its answers.
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Growing Trees
Growing procedural trees through competition for light: buds, resource allocation, shoot direction, and branch shedding.
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Docker is weird
I decided to make my own container runtime for fun, and even though I’m still early on, I’ve learned that Docker is weird . Here’s some weird things I learned about Docker.
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LLMs are making formal software verification feasible at a much larger scale
Claude formally proved security properties in the compiled code of 123 open-source libraries. Along the way, it found bugs that had eluded detection for years.
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Crystal 1.22
We are announcing a new Crystal release 1.22.0 with several new features and bug fixes.
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Faster than earcut: triangulating 3.7M map polygons in 489 ms
We published the triangulator of our map engine as earstrip, an ISC-licensed C++ and WebAssembly library. How it came to be: the ear clipper rebuilt one idea at a time and timed on 3.7 million polygons of real map data.
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WorldTUI: I trained a 360M model to pretend to be a terminal
A 360M model that pretends to be a terminal, and remembers what you did
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The compiler was supposed to end programming too
In 1954, IBM said FORTRAN would virtually eliminate coding and debugging. What the numbers say about AI and software work in 2026, and my guess at a developer's Tuesday in 2031.
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Today's PHP security release, and how we're strengthening security
Describing the story behind how critical security vulnerabilities were found and fixed.
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DuckDB 2.0.0 LTS “Cinnamon Teal”
The DuckDB team is happy to announce that today we're releasing DuckDB version 2.0.0 LTS, codenamed “Cinnamon Teal” (Spatula cyanoptera). This is our biggest feature release so far, and it ships a polished version of the Quack protocol, asynchronous I/O, a first-class VARIANT type, agent mode, triggers, an extensible…
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PHP2Shell by Calif Research
A tale of two PHP remote vulnerabilities
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Compromised LiteLLM 1.107.0 on PyPI Installs a Credential Stealer and Backdoor
LiteLLM 1.107.0 on PyPI ships a .pth credential stealer and a sitecustomize.py backdoor that run on every Python start. How the implant got in, what it steals, and indicators of compromise.
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C vs. C#: racing VLC's Gaussian blur
A real VLC video filter, ported line by line to C# and raced against the original C inside VLC 4, then optimized on both sides, with byte-identical output throughout.
78
Using LLM for confidence scoring is a bad idea
LLM-based agents can do a lot of tasks. Or, at least, they can appear to do them. For example, they write code, summarize papers, plan trips, and fill in forms. If you ask one for a probability or a confidence score, it will give you one of those too. I have seen many agent designers use LLMs to generate confidence…
79
Bringing uv and ty together
Experimental uv-ty integration enables first-class support for Python scripts on the CLI and in the editor, and a unified uv check command.
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Security advisory: Critical remote code execution vulnerabilities, update now
PHP is a popular general-purpose scripting language that powers everything from your blog to the most popular websites in the world.
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Advanced coding in low-resource programming languages
Learn how OpenAI is improving ChatGPT across low-resource programming languages, with new evaluations for software engineering, SQLite, and COBOL migration.
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2026 is an exciting year for the Rust compiler (and me)
Matyáš Racek's blog
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Tsrs: A Port of TypeScript to Rust
Cloudflare is collaborating on tsrs, a Rust port of TypeScript that is up to 8x faster and uses 70% less memory.
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NixOS is making me less afraid
Something funny happened a little while ago: I read about FreshRSS, and it sounded nice, so I installed it on a server and started using it . That would not have happened a year ago, but then again, a year ago I didn’t have any NixOS servers.
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The reverts will continue until morale improves
Many readers will be aware that an unusually high number of features have been reverted from the PostgreSQL 19 branch after the beta period began. Having some reverts is not unusual, maybe one per cycle could be expected. But this time around, about 8 to 10 significant features, depending on how you count, have been…
86
I no longer care to work on any Ruby gems so I've archived all my repositories
I’ve decided to archive the source code of my Ruby gems to make it clear that I’m no longer working on them; I’ve written this post to link from them in order to explain why.
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Code is clay now
Artisans, factories and the new material software is made of
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Superlite: A Faster Alternatie to Superpowers
Why I built superlite, an autonomous build workflow for Claude Code that doesn't ask permission every four minutes: how it works, how to use it, and the benchmarks.
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Personal software factories are a waste of time
Why the last thing you should spend time on is your own software factory.
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