Skip to content
View jhawthorn's full-sized avatar


@rails @github @ruby @pry @sparklemotion @microsoft @TEAMBUTT @maintainers @trilogy-libraries
Block or Report

Block or report jhawthorn

Block user

Prevent this user from interacting with your repositories and sending you notifications. Learn more about blocking users.

You must be logged in to block users.

Please don't include any personal information such as legal names or email addresses. Maximum 100 characters, markdown supported. This note will be visible to only you.
Report abuse

Contact GitHub support about this user’s behavior. Learn more about reporting abuse.

Report abuse

👋 Hi! I'm John Hawthorn

I'm a staff software engineer on the Ruby Architecture team here at GitHub :octocat:.

I'm a 💎 Ruby committer and on the 🚋 Rails core team. I like to spend as much time as possible working on performance. Hopefully I've made your code run faster too 🤗

Some of my open source projects:

🔍 fzy is a fast and simple fuzzy text finder for the terminal. I wote fzy wanting a faster and more consistent algorithm than was available at the time, other tools have since adopted my algorithm. Fun fact: If you press t to find files in a GitHub repo that's fzy!

🗑 discard provides a simple soft-delete pattern for ActiveRecord.

🖼️ meh is a fast image viewer for X11 using raw XLib.

I dabble in electronics ⚡:

⌨️ I designed a USB controller to modernize Model M keyboards.

⌨️ I hand wired an ergodox-style keyboard

☕ I built an MQTT-enabled temperature controller for my espresso machine


  1. fzy fzy Public

    🔍 A simple, fast fuzzy finder for the terminal

    C 2.9k 123

  2. ruby/ruby ruby/ruby Public

    The Ruby Programming Language

    Ruby 21.5k 5.2k

  3. rails/rails rails/rails Public

    Ruby on Rails

    Ruby 54.8k 21.3k

  4. discard discard Public

    🃏🗑 Soft deletes for ActiveRecord done right

    Ruby 2k 77

  5. pub_grub pub_grub Public

    A ruby port of the PubGrub version solver

    Ruby 146 11

  6. rapidjson-ruby rapidjson-ruby Public

    A fast JSON library for Ruby

    Ruby 36 5