Evan Phoenix - RubyConf 2007

Evan Phoenix - RubyConf 2007

Last things first,
first things last.
What is the endgame?
In a word..
Evan Phoenix - RubyConf 2007

Total
Evan Phoenix - RubyConf 2007

Total world
Evan Phoenix - RubyConf 2007

Total world domination
Evan Phoenix - RubyConf 2007

For Ruby!
Evan Phoenix - RubyConf 2007

375 days ago...
In a galaxy far far away...
(aka Denver)
Evan Phoenix - RubyConf 2007

Evan Phoenix - RubyConf 2007

Evan Phoenix - RubyConf 2007

The end of Sydney
The beginning of Rubinius
Evan Phoenix - RubyConf 2007

Enormous progress
Evan Phoenix - RubyConf 2007

class Rubinius < Smalltalk
# form
include Ruby::Syntax
# function
include Ruby::Behavior
# elbow grease
include Google.search(“crazy cs papers”)
end
Evan Phoenix - RubyConf 2007

CS Nerd Attack Mode!
(blitznerdo)
Evan Phoenix - RubyConf 2007

Generational
Garbage Collection!
(with heap compaction)
Evan Phoenix - RubyConf 2007

Bytecode execution!
Evan Phoenix - RubyConf 2007

Stackless!
(uses no C stack)
Evan Phoenix - RubyConf 2007

Self-hosted
kernel and compiler!
Evan Phoenix - RubyConf 2007

Pre-compiled files!
(.rbc)
Evan Phoenix - RubyConf 2007

Builtin packaging!
(.rba == .jar)
Evan Phoenix - RubyConf 2007

Oh my!
Evan Phoenix - RubyConf 2007

Audience
Participation
Evan Phoenix - RubyConf 2007

Runtime and Kernel
Evan Phoenix - RubyConf 2007

kernel
noun
a softer, usually edible part of a nut, seed, or fruit stone contained
within its hard shell.
• the seed and hard husk of a cereal, esp. wheat.
• [in sing. ] the central or most important part of
something : this is the kernel of the argument.
• the most basic level or core of an operating system of a
computer, responsible for resource allocation, file management,
and security.
• [as adj. ] Linguistics denoting a basic unmarked linguistic string.
Evan Phoenix - RubyConf 2007

1.8
Evan Phoenix - RubyConf 2007

84,516 lines of C
0 lines of Ruby
Evan Phoenix - RubyConf 2007

1.9
Evan Phoenix - RubyConf 2007

128,786 lines of C
0 lines of Ruby
Evan Phoenix - RubyConf 2007

IronRuby
(pre-alpha1)
Evan Phoenix - RubyConf 2007

48,282 lines of .cs
0 lines of Ruby
Evan Phoenix - RubyConf 2007

JRuby 1.0.2
Evan Phoenix - RubyConf 2007

114,507 lines of .java
0 lines of Ruby
Evan Phoenix - RubyConf 2007

Rubinius
Evan Phoenix - RubyConf 2007

25,398 lines of C
13,946 lines of Ruby
Evan Phoenix - RubyConf 2007

NOT Ruby Ruby
150,000
125,000
100,000
75,000
50,000
25,000
0
1.8 1.9 ironruby jruby rubinius
Evan Phoenix - RubyConf 2007

Junior High
Analysis
Evan Phoenix - RubyConf 2007

1.8 and 1.9
Ruby for C programmers
Evan Phoenix - RubyConf 2007

JRuby
Ruby for Java programmers
Evan Phoenix - RubyConf 2007

IronRuby
Ruby for C# programmers
Evan Phoenix - RubyConf 2007

Rubinius
Ruby for Ruby programmers
Evan Phoenix - RubyConf 2007

Evan Phoenix - RubyConf 2007

Eating your own dog food
==
Feedback loop
Evan Phoenix - RubyConf 2007

Optimized Rubinius
kernel / VM
==
Optimization for all
Ruby code
Evan Phoenix - RubyConf 2007

Evan Phoenix - RubyConf 2007

You’re a Ruby developer,
I’m a Ruby developer
Evan Phoenix - RubyConf 2007

Of the rubists,
by the rubists,
for the rubists
Evan Phoenix - RubyConf 2007

Evan Phoenix - RubyConf 2007

Road, rubber,
all that jazz.
Evan Phoenix - RubyConf 2007

Faster in 24 of 31 tests
(yarv micro benchmarks against 1.8)
Evan Phoenix - RubyConf 2007

Moving quickly
Evan Phoenix - RubyConf 2007

so why isn’t it done?
Evan Phoenix - RubyConf 2007

Architecture/design is
quite important
Evan Phoenix - RubyConf 2007

but hard to create in a
vacuum
Evan Phoenix - RubyConf 2007

Mistakes were made.
Evan Phoenix - RubyConf 2007

“Practice makes perfect”
-- Ryan Davis (RubyConf 2007)
Evan Phoenix - RubyConf 2007

“A person who never made a
mistake never tried anything new”
-- Albert Einstein
“You will do foolish things,
but do this with enthusiasm”
-- Collete
Evan Phoenix - RubyConf 2007

-Ofun
Evan Phoenix - RubyConf 2007

Rarely a burden,
always a treat.
Evan Phoenix - RubyConf 2007

Community
Evan Phoenix - RubyConf 2007

57 committers
17 with 20 or more commits
36 with 100+ lines changed
Evan Phoenix - RubyConf 2007

Weekend patchers
&
Code junkies alike
Evan Phoenix - RubyConf 2007

Free flowing commit bit
Evan Phoenix - RubyConf 2007

Marcus Crafter
Pat Eyler
David Waite
Shane Becker Evan Phoenix - RubyConf 2007

Eric Hodel
Adam Gardiner
Brian Ford
Kevin Clark
Evan Phoenix - RubyConf 2007

Wilson Bilkovich
Ryan Davis
Yehuda Katz Evan Phoenix - RubyConf 2007

Abigail Phoenix
John Hornbeck (official wife)
Fog
(official mascot)
Eero Saynatkari Evan Phoenix - RubyConf 2007

Thanks EY!
Evan Phoenix - RubyConf 2007

Evan Phoenix
<evan@fallingsnow.net>
Evan Phoenix - RubyConf 2007

Evan Phoenix - RubyConf 2007

Backtraces!
An exception has occurred:
User requested termination with Control-C (Interrupt)
Backtrace:
Readline.readline at kernel/core/readline.rb:52
main.__script__ at lib/bin/sirb.rb:78
main.load at kernel/core/compile.rb:78
main.require at kernel/core/compile.rb:129
Array#each at kernel/core/array.rb:526
Integer(Fixnum)#times at kernel/core/integer.rb:19
Array#each at kernel/core/array.rb:526
main.require at kernel/core/compile.rb:112
Array#each at kernel/core/array.rb:526
Integer(Fixnum)#times at kernel/core/integer.rb:19
Array#each at kernel/core/array.rb:526
main.require at kernel/core/compile.rb:111
main.__script__ at kernel/loader.rb:159
Evan Phoenix - RubyConf 2007

C extensions can
misbehave
Evan Phoenix - RubyConf 2007

VALUE test_segfault(VALUE self) {
// Get a pointer to address 4.
char *i = (char*)4;
// Attempt to read from address 4
// which is definitely not allowed.
x = *i;
// Never get this far.
return Qnil;
}
Raises an exception!
Segfault detected in function 0x90a00 (accessing 0x4) (MemorySegmentionError)
SomeExtension#test_segfault at extensions/test/test.c
main.__script__ at extensions/test/test.rb:38
main.load at kernel/core/compile.rb:95
main.__script__ at kernel/loader.rb:122
Evan Phoenix - RubyConf 2007

Time lost to segfaults
1.8 rubinius
200
200
150
100
70
50 30
10
6
2
1 3 5
Evan Phoenix - RubyConf 2007

Memory usage
Evan Phoenix - RubyConf 2007

• 1.8 garbage collector is
simple, but too simple.
• Rubinius uses modern
techniques to decrease
memory usage and increase
throughput
Evan Phoenix - RubyConf 2007

Fork you!
Evan Phoenix - RubyConf 2007

In 1.8...
• Start up a program.
• Require all your code.
• fork() the process.
• Watch your memory double.
Evan Phoenix - RubyConf 2007

In Rubinius...
• Start up a program.
• Require all your code.
• fork() the process.
• Watch (virtually) NO change in the memory
footprint!
Evan Phoenix - RubyConf 2007

Memory change per
additional instance
1 2 3 4
1.8 rubinius
Evan Phoenix - RubyConf 2007

Thank You!
Evan Phoenix - RubyConf 2007