Threadify-0.0.3

NAME
threadify.rb

SYNOPSIS
enumerable = %w( a b c d )
enumerable.threadify(2){ ‘process this block using two worker
threads’ }

DESCRIPTION
threadify.rb makes it stupid easy to process a bunch of data using
‘n’
worker threads

INSTALL
gem install threadify

URI
http://rubyforge.org/projects/codeforpeople

SAMPLES

<========< sample/a.rb >========>

~ > cat sample/a.rb

 require 'open-uri'
 require 'yaml'

 require 'rubygems'
 require 'threadify'


 uris =
   %w(
     http://google.com
     http://yahoo.com
     http://rubyforge.org
     http://ruby-lang.org
     http://kcrw.org
     http://drawohara.com
     http://codeforpeople.com
   )


 time 'without threadify' do
   uris.each do |uri|
     body = open(uri){|pipe| pipe.read}
   end
 end


 time 'with threadify' do
   uris.threadify do |uri|
     body = open(uri){|pipe| pipe.read}
   end
 end


 BEGIN {
   def time label
     a = Time.now.to_f
     yield
   ensure
     b = Time.now.to_f
     y label => (b - a)
   end
 }

~ > ruby sample/a.rb

 ---
 without threadify: 3.75206303596497
 ---
 with threadify: 1.37899804115295

<========< sample/b.rb >========>

~ > cat sample/b.rb

 require 'yaml'

 require 'rubygems'
 require 'threadify'

 size = Integer(ARGV.shift || (2 ** 15))

 haystack = Array.new(size){|i| i}
 needle = 2 * (size / 3)

 a, b = 4, 2

 time 'without threadify' do
   a = haystack.each{|value| break value if value == needle}
 end

 time 'with threadify' do
   b = haystack.threadify(16){|value| threadify! value if value ==

needle}
end

 raise if a != b

 y :a => a, :b => b, :needle => needle

 BEGIN {
   def time label
     a = Time.now.to_f
     yield
   ensure
     b = Time.now.to_f
     y label => (b - a)
   end
 }

~ > ruby sample/b.rb

 ---
 without threadify: 0.00630998611450195
 ---
 with threadify: 0.270262956619263
 ---
 :needle: 21844
 :a: 21844
 :b: 21844

HISTORY
0.0.3
- added ability to short-circuit the parallel processing, a.k.a
to ‘break’
from threadify

0.0.2
- don’t use thread.exit, just let the thread die naturally
- add version to Threadify module
- comments :wink:

a @ http://codeforpeople.com/

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