case_comp.rb

require 'benchmark'

Benchmark.bm do |b|
  b.report "upcase         " do
    e = "Collaboratively administrate empowered markets via plug-and-play networks -- http://www.cipsum.com/"
    1_000_000.times { e[0] == e[0].upcase }
  end
  
  b.report " /^[A-Z]/      " do
    e = "Collaboratively administrate empowered markets via plug-and-play networks -- http://www.cipsum.com/"
    1_000_000.times { e =~ /^[A-Z]/ }
  end
  
  b.report "include?       " do
    e = "Collaboratively administrate empowered markets via plug-and-play networks -- http://www.cipsum.com/"
    1_000_000.times {	("A".."Z").include?(e.chr) }
  end
  
  b.report " /^[[:upper:]]/" do
    e = "Collaboratively administrate empowered markets via plug-and-play networks -- http://www.cipsum.com/"
    1_000_000.times { e =~ /^[[:upper:]]/ }
  end
  
  b.report "ord            " do
    e = "Collaboratively administrate empowered markets via plug-and-play networks -- http://www.cipsum.com/"
    1_000_000.times { i = e.ord; i > 64 && i < 91 }
  end
end