benchmark.rb

#!/usr/bin/env ruby

require 'rubygems'

require 'bundler'
Bundler.require :default

require 'benchmark'

secret = 'APLkbvwfFosYHj3m4dvnE5'

hashes = []

n = 1000

Benchmark.bm do |x|

  x.report 'bcrypt-create' do
                      n.times do
                        hashes << BCrypt::Password.create( secret,
                                                           :cost => 5 )
                      end
                    end

  x.report 'bcrypt-verify' do
                      n.times do
                        raise StandardError unless BCrypt::Password.new( hashes.pop ) == secret
                      end
                    end

end

Gemfile

source 'https://rubygems.org'

gem 'bcrypt-ruby', :require => 'bcrypt'