I really enjoy learning new things in my free time. Lately I’ve been studying this book on Static Program Analysis. The book is very good, but some of the formulas are quite dense so I like to try writing them out in code. The chapter I’m currently reading (chapter 9) has a section on finding possib...

Today Reuters and the Wall Street Journal both reported about rogue AI agents at OpenAI attacking RubyGems.org. https://www.rubyhack.ai/ has an amazing writeup, and you should read it. I just wanted to make a quick post about it because it’s wild. TL;DR: It seems like OpenAI Bots knew about this cac...

I’m at RubyConf this week, and it’s great! I recently read that lobste.rs is now running on SQLite. One part from the post caught my attention: I wish we could say in a test, “Fail if you encounter any full table scans”. Which would have caught the perf issues we experienced during the first deploy....

For quite a few years the Rails project has been working with the Internet Bug Bounty (IBB). The IBB is an organization that awarded cash to security researchers that reported issues to OSS projects participating in the IBB. For quite a while I wasn’t certain about my feelings toward the program bec...

Last weekend we took the ferry to Bainbridge Island to see a Mochi Tsuki event. I read about the history of Japanese immigrants on Bainbridge island. I saw people making mochi, a taiko drummer group, and traditional dances. It was a lot of fun, and I learned a lot. Definitely recommend this event!

I bought a Pixoo64 LED Display to play around with, and I love it! It connects to WiFi and has an on-board HTTP API so you can program it. I made a Ruby client for it that even includes code to convert PNG files to the binary format the sign wants. One cool thing is that the display can be configure...

Did a few cat pics tonight!

At RailsWorld earlier this year, I got nerd sniped by someone. They asked “why can’t Bundler be as fast as uv?” Immediately my inner voice said “YA, WHY CAN’T IT BE AS FAST AS UV????” My inner voice likes to shout at me, especially when someone asks a question so obvious I should have thought of it ...

Happy holidays everyone! Have a great rest of the year!

Went to the Seattle waterfront over the weekend to watch the sunset (at like 4pm lol). Unfortunately it was pretty cloudy out, but I had a good time.

I want to try posting more images to my blog, so here’s my first try. Instagram doesn’t really seem like a good place to post photos anymore, so I figured I’d try on my blog. I’d like to get my blog working with Posse Party at some point, I just need to figure out the API keys, and then I can cross ...

The Apple Photos app sometimes corrupts images when importing from my camera. I just wanted to make a blog post about it in case anyone else runs into the problem. I’ve seen other references to this online, but most of the people gave up trying to fix it, and none of them went as far as I did to deb...

I haven’t blogged in a while, so I figured I should do that. Jet lag has blessed me with some free time this morning, so I figured I would make some content in order to feed the AI bots. I’ve been messing around with pre-allocating files on the file system on macOS. This is useful in cases where you...

My last post detailed one way that CRuby will eliminate some intermediate array allocations when using methods like Array#hash and Array#max. Part of the technique hinges on detecting when someone monkey patches array. Today, I thought we’d dive a little bit in to how CRuby detects and de-optimizes ...

Recently I gave a talk at RailsWorld (hopefully they’ll post the video soon), and part of my presentation was about eliminating allocations in tokenizers. I presented a simple function for measuring allocations: def allocations x = GC.stat(:total_allocated_objects) yield GC.stat(:total_allocated_obj...

Lets mess around with serial ports today! I love doing hardware hacking, and dealing with serial ports is a common thing you have to do when working with embedded systems. Of course I want to do everything with Ruby, and I had found Ruby serial port libraries to be either lacking, or too complex, so...

Lately I’ve been messing around with writing a GraphQL parser called TinyGQL. I wanted to see how fast I could make a GraphQL parser without writing any C extensions. I think I did pretty well, but I’ve learned some tricks for speeding up parsers and I want to share them. Today we’re going to specif...

I’ve been working my way through Engineering a Compiler. I really enjoy the book, but one part has you build an interference graph for doing register allocation via graph coloring. An interference graph is an undirected graph, and one way you can represent an undirected graph is with a bitmap matrix...

I do most of my text editing with MacVim, but when I pair with people I like to use tmate. tmate is just an easy way to connect tmux sessions with a remote person. But this means that I go from coding in a GUI to coding in a terminal. Normally this wouldn’t be a problem, but I had made a Fish alias ...