spec_compare

#!/usr/bin/env ruby
spec_commands = {"1.1.12" => "spec", "#does_not_match? version" => "~/p/ruby/rspec/bin/spec"}
base_line = "1.1.12"
number_of_runs = ENV['NUMBER_OF_RUNS'] || 50

class Array
  def average
    @average ||= self.inject{|sum,v| sum + v} / size.to_f
  end
end

run_results = {} 
totals = {}
spec_commands.each do |version, bin|
  command = "#{bin} #{ARGV.join(' ')}"
  puts "Running the spec #{version} #{number_of_runs} times: #{command}"
  run_results[version] = []
  number_of_runs.times do |i|
    print "."
    STDOUT.flush
    `#{command}` =~ /Finished in (.+) seconds/
    run_results[version] << $1.to_f
  end
  puts ""
end

puts "Average Run Time"
spec_commands.each do |version, _|
  min, max = [run_results[base_line].average, run_results[version].average].sort 
  percentage = ((max - min) / min) * 100.0
  diff = (min == run_results[version].average) ? "faster" : "slower"
  puts "#{version} - #{run_results[version].average} seconds (#{percentage}% #{diff} than #{base_line})"
end

truth.rb

describe "Truth" do
  5000.times do |i|
    it "should not be false" do
      true.should_not be_false
    end
  end
end