@jhawthorn.com - John Hawthorn

05 Apr 2026 02:30 +0000

Proud of this patch I landed to Ruby this week which makes constants inside of `class << self` scopes faster both in the interpreter and JITs. It's not the most complicated or even impactful, but something I've wanted to fix for years https://github.com/ruby/ruby/pull/16604

01 Apr 2026 15:39 +0000

I've proposed adding $SECONDS, $RANDOM, and other bash features to Ruby bugs.ruby-lang.org/issues/21976 https://bugs.ruby-lang.org/issues/21976

27 Mar 2026 01:08 +0000

If the catcher sees his shadow there's 6 more weeks of spring training

27 Feb 2026 06:21 +0000

Can't wait for Sunday's game

28 Oct 2025 05:32 +0000

To the uninitiated, this is what every baseball game is like.

19 Oct 2025 20:40 +0000

I made it easier to search Ruby's docs https://www.johnhawthorn.com/2025/searching-ruby-docs/

21 Sep 2025 02:01 +0000

I have a hard time placing exactly what it is, but something about `bat` and other "modern" TUI tools really rubs me the wrong way. They're clearly well made, I think it's more of an aesthetic thing where that is exactly what I was running away from by using command line tools.

01 Aug 2025 19:43 +0000

27 May 2025 01:27 +0000

I'm a nervous flier, but fortunately I've downloaded the new season of Nathan Fielder's show "The Rehearsal" to distract me. No spoilers please, I want to go in blind

01 Apr 2025 18:39 +0000

I've just released unsafe 1.0.0! A gem bringing the power of Rust's unsafe to Ruby! https://github.com/jhawthorn/unsafe

25 Mar 2025 02:35 +0000

One of my favourite things (of many) about rr-project.org is how it actually complements my tendency to be a printf debugger, because it's so easy to start gdb at the point that the output goes wrong. https://rr-project.org/