I'm k0kubun (Takashi k0kubun)

Software Engineer, interested in:

- Performance optimization

- Building and contributing to OSS

Oct 2013 - Mar 2015

Cookpad Inc.

Part-time Rails application engineer

Apr 2015 - Feb 2017

Cookpad Inc.

Developer Productivity Group

Mar 2017 - present

Treasure Data Inc.

Highlight

Nov 2017
Final Nominee Ruby Prize 2017 - news
May 2017
Became a Ruby Commiter

Education

Apr 2011 - Mar 2015
BS Computer Science Tokyo Institute of Technology

OPEN SOURCE PROJECTS

Most starred projects

Hamlit
High Performance Haml Implementation, which is the fastest template engine for Ruby
md2key
md2key converts markdown to keynote by GUI scripting with AppleScript
Nocturn
Multi-platform Twitter Client built with React, Redux and Electron
pp
Colored pretty printer for Go language
gitstar-ranking
Rails application to show star ranking of GitHub(not maintained)
LLRB
LLRB is a LLVM-based JIT compiler for Ruby.

Other projects

activerecord-precount
ActiveRecord plugin to kill N+1 COUNT queries
xremap
Configuration management tool embedding mruby
mitamae, itamae-go
Configuration management tool embedding mruby
Barbeque
A multi-tenant job queue system to run job with Docker
hescape
C library for fast HTML escape using SSE instructions
clannad
C language compiler built as LLVM frontend. (work in progress)
rack-user_agent
Rack::Request extension for handling User-Agent

TALKS

RubyConf 2017
Comming Soon
RubyKaigi 2017
LLVM-Based JIT Compiler for CRuby - SpeakerDeck
RubyConf 2016
Evaluate Ruby Without Ruby - SpeakerDeck, YouTube, Togetter
RubyKaigi 2016
Scalable Job Queue System Built with Docker - SpeakerDeck, YouTube
RubyKaigi 2015
High Performance Template Engine - SpeakerDeck
RubyKaigi 2015
How I debugged debugger - SpeakerDeck