nahi

% cat bench_fib_recursive.rb     
require 'benchmark'

def fib_ruby(n)
  if n < 2
    n
  else
    fib_ruby(n - 2) + fib_ruby(n - 1)
  end
end

nahi

forkjoin.rb: https://github.com/headius/forkjoin.rb

# examples/recursive/fibonacci.rb
% jruby -Ilib -v examples/recursive/fibonacci.rb 5 30
jruby 1.7.0.dev (ruby-1.8.7-p352) (2011-11-22 120223b) (Java HotSpot(TM) 64-Bit Server VM 1.7.0_02-ea) [linux-amd64-java]
fib(30) = 832040
1240.000010 [msec]
fib(30) = 832040
703.999996 [msec]
fib(30) = 832040

nahi

import java.util.*;

public class G {
    interface F {
       int calc(int x);
    }

    public static void main(String[] args) {
        F fib = (x) -> (x < 2) ? x : fib.calc(x - 1) + fib.calc(x - 2); // fibonacci
        Comparator<String> reverse = (a, b) -> -1; // reverse sort

nahi

% ruby -ropenssl -e 'p OpenSSL::X509::Certificate.new(File.read("lib/mechanize/test_case.rb")).public_key.e' 
1
% ruby -ropenssl -e 'puts OpenSSL::X509::Certificate.new(File.read("lib/mechanize/test_case.rb")).to_text'             
Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number: 0 (0x0)
        Signature Algorithm: sha1WithRSAEncryption
        Issuer: CN=nobody, DC=example
        Validity

nahi

% uname -a
Linux ubuntu 3.0.0-12-generic #20-Ubuntu SMP Fri Oct 7 14:56:25 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
% for a in {1..10}; do time JAVA_HOME=/home/nahi/java/jdk1.6.0_29 jruby165 -e 0; done
JAVA_HOME=/home/nahi/java/jdk1.6.0_29 /home/nahi/java/jruby-1.6.5/bin/jruby -  0.42s user 0.37s system 57% cpu 1.377 total
JAVA_HOME=/home/nahi/java/jdk1.6.0_29 /home/nahi/java/jruby-1.6.5/bin/jruby -  0.54s user 0.10s system 106% cpu 0.596 total
JAVA_HOME=/home/nahi/java/jdk1.6.0_29 /home/nahi/java/jruby-1.6.5/bin/jruby -  0.48s user 0.14s system 120% cpu 0.520 total
JAVA_HOME=/home/nahi/java/jdk1.6.0_29 /home/nahi/java/jruby-1.6.5/bin/jruby -  0.48s user 0.12s system 110% cpu 0.537 total
JAVA_HOME=/home/nahi/java/jdk1.6.0_29 /home/nahi/java/jruby-1.6.5/bin/jruby -  0.50s user 0.08s system 111% cpu 0.519 total
JAVA_HOME=/home/nahi/java/jdk1.6.0_29 /home/nahi/java/jruby-1.6.5/bin/jruby -  0.46s user 0.11s system 97% cpu 0.581 total
JAVA_HOME=/home/nahi/java/jdk1.6.0_29 /home/nahi/java/jruby-1.6.5/bin/jruby -  0.

nahi

require 'date'

class Date
  # Try to read Marshal data of 1.9.3 Date
  # !!CAUTION: COMPLETELY UNTESTED!!!
  if RUBY_VERSION < "1.9.3"
    def marshal_load(ary)
      case ary.size
      when 3
        @ajd, @of, @sg, = ary

nahi

% jruby165 -e 'File.open("longstr.rb", "w") { |f| f << "str = %q(" << ("0" * 1000) << ")\np :sleep\n" }' && jruby165 longstr.rb 
:sleep
% jruby165 -e 'File.open("longstr.rb", "w") { |f| f << "str = %q(" << ("0" * 10000) << ")\np :sleep\n" }' && jruby165 longstr.rb
% jruby165 -e 'File.open("longstr.rb", "w") { |f| f << "\n" << "str = %q(" << ("0" * 10000) << ")\np :sleep\n" }' && jruby165 longstr.rb
:sleep
% 

nahi

require 'benchmark'

TIMES = 5000000

Benchmark.bmbm(40) do |x|
  x.report('hoge[:fuga] = foo') do
    hoge = {}
    foo = :foo
    TIMES.times do
      hoge[:fuga] = foo

nahi

% ruby -e 'p(begin; raise; rescue => e; end)'
nil
% ruby187 -e 'p(begin; raise; rescue => e; end)'
RuntimeError
% jruby --1.9 -e 'p(begin; raise; rescue => e; end)'
RuntimeError
% jruby --1.8 -e 'p(begin; raise; rescue => e; end)'
RuntimeError
% jruby -J-Xbootclasspath/a:$JRUBY_HOME/build_lib/jgrapht-jdk1.5.jar -X-CIR -e 'p(begin; raise; rescue => e; end)'
RuntimeError

nahi

require 'zlib'

class MyInflate
  def initialize(input)
    @z = Zlib::Inflate.new
    @input = input
    @buf = ''
  end

  def read(n)