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CRuby Committers 
Who’s Who in 2014
CRuby Committers 
84 
accounts 
(including a bot)
Active Committer 
(committed since 2013/06/01) 
50 
(including a bot)
Committers as 
Speakers 
15 
(including 3 keynote speakers)
SEP 18 
First Day (Today)
nagachika 
Tomoyuki Chikanaga (@nagachika) 
Groovenauts, Inc. 
CRuby Committer/ 2.1 branch maintainer 
ruby-trunk-changes 
RubyPrize 2013 ← NEW!!
nagachika 
Tomoyuki Chikanaga (@nagachika) 
Groovenauts, Inc. 
CRuby Committer/ 2.1 branch maintainer 
ruby-trunk-changes 
RubyPrize 2013 ← NEW!! 
Speaker Icon 
svn account 
bio 
Update from “Who’s Who in 2013”
ko1 
Koichi Sasada 
Heroku, Inc. 
Ruby’s VM 
Speed Freak 
RGenGC 
Incremental GC ← NEW!!
ko1 
Photo by @hsbt 
newlyweds ← NEW!!
nari 
Narihiro Nakamura 
Mr. GC 
Lazy Sweep/Bitmap Marking 
Symbol GC ← NEW!!
SEP 19 
2nd Day
matz 
Yukihiro "Matz" Matsumoto 
The Creator of Ruby 
Language Designer 
mruby
matz 
Title Collector 
Charman - Ruby Association 
Fellow - NaCl 
Chief architect, Ruby - Heroku 
Research institute fellow - Rakuten 
Charman - NPO mruby Forum 
Senior researcher - Kadokawa Ascii Research Lab 
Visiting Professor - Shimane University 
Honable member - Matsue City 
…
matz 
r44436 
version.h 
bump up version to 2.2.0 ← NEW!! 
-#define RUBY_VERSION "2.1.0" +#define RUBY_VERSION "2.2.0"
kazu 
Kazuhiro NISHIYAMA 
Mr. ‘fix typo’ 
97 / 143 ≒ 68% ‘fix typo’ ratio
kazu 
proofreading ‘ruby-trunk-changes’
hsbt 
Hiroshi SHIBATA 
GMO Pepabo, Inc. 
Administrator of *.ruby-lang.org (www, bugs, ML) 
Test edge ruby (trunk) on rails
sorah 
Shota Fukumori 
Cookpad Inc. 
test/unit maintainer →(dropped from stdlib) 
parallel test
kouji 
Kouji Takao 
Readline extension maintainer 
MacRuby committer 
Ruby Programming Shounendan ← NEW!! 
http://smalruby.jp/
ktsj 
Kazuki Tsujimoto 
Nomura Research Institute, Ltd. 
VM Bug Hunter 
Pattern Matching (pattern-match) 
Power Assert(test-unit-power_assert) ← NEW!!
SEP 20 
3rd Day
tenderlove 
Aaron Patterson 
AT&T → RedHat, Inc. ← NEW!! 
psych/dl/fiddle maintainer 
Rails Committer 
Takoyaki Kamen?
keiju 
Keiju Ishitsuka 
Ruby’s godfather 
irb author & maintainer
seki 
Masatoshi SEKI 
dRuby/rinda/erb auther & maintainer
zzak 
zzak 
Documentation maintainer 
rubygems, rake, rdoc contributor 
Conference freak ← NEW!? 
England, Singapore, Mexico, Scotland, Taiwan, Japan, 
Philippines, India, Australia, South Africa, Belgium
kou 
Kouhei Sutou 
ClearCode Inc. 
rexml/rss/xmlrpc maintainer 
Groonga ← NEW!!
tmm1 
Aman Gupta 
GitHub, Inc. 
Memory Optimizations 
Inspection/Profiler/Debugger 
Hash#[] Optimization ← NEW!! 
ObjectSpace.dump_all ← NEW!!
NEXT 
ko1’s Keynote 
“Build-up Ruby interepreter - What 
is easy and what is diffi゙cult?” 
TO BE CONTINUED...

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CRuby_Committers_Whos_Who_in_2014