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.
Visit tenderlovemaking.com → RSS feedOn Hacker News Jul 2012 – Sep 2026
Software Engineering 8Tools & Productivity 3Systems & Performance 2Databases & Data 2Web & Frontend 1Security & Privacy 1
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 debug the issue. I’ll…
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 the RubyGems caching…
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 myself. Since then…
I’ve been working on building a compacting garbage collector in Ruby for a while now, and one of the biggest hurdles for implementing a compacting GC is updating references. For example, if Object A points to Object B, but the compacting GC moves Object B, how do we make sure that Object A points to the new location?…
It’s not often I am able to write a patch that not only reduces memory usage, but increases speed as well. Usually I find myself trading memory for speed, so it’s a real treat when I can improve both in one patch. Today I want to talk about the patch I submitted to Ruby in this ticket. It decreases “after boot” memory…
TL;DR: AdequateRecord is a set of patches that adds cache stuff to make ActiveRecord 2x faster
Update (2023-06-28): Added “I required a file, but I want to know what files were actually loaded” I love puts debugging I am a puts debuggerer. I don’t say this to disparage people that use a Real Debugger. I think Real Debuggers are great, I’ve just never taken the time to learn one well. Every time I try to lean…
TL;DR Rails 4.0 will allow you to stream arbitrary data at arbitrary intervals with Live Streaming. HAPPY MONDAY EVERYONE! Besides enabling multi-threading by default, one of the things I really wanted for Rails 4.0 is the ability to stream data to the client. I want the ability to treat the response object as an I/O…
In a previous post, I wrote a bit about how Ruby objects are laid out in memory. Today we’ll use that information to write a program that will allow us to take a Ruby heap dump and visualize the layout and fragmentation of that heap. Ruby Object Layout Recap Just as a recap, Ruby objects are fixed width. That is…