String encoding demo

encoding.rb

#!/usr/bin/env ruby

require 'benchmark'

length = 512
iterations = 100000
encodings = Encoding.name_list

Benchmark.bmbm do |r|
  r.report("encode") do
    iterations.times do
      encoding = encodings.sample
      x = File.read("/dev/urandom", length).force_encoding(encoding)
      y = x.dup.force_encoding('ISO-8859-1').encode('UTF-8')
      raise 'unequal' unless y.encode('ISO-8859-1').force_encoding(encoding) == x
    end
  end
end