Crappy benchmark thrown together while working on Topaz IO buffering

ridiculous-ruby-benchmark.rb

class Garbage
  def write(n)
    out.write(n.to_s)
    out.print ' '
    out.print 't'
    out.print 'i'
    out.print 'm'
    out.print 'e'
    out.print 's'
    out.write('. ')
  end

  def out
    @out ||= IO.new(2)
  end
end

def main
  multiplier = Float(ARGV.first || 1)
  $stderr.puts "Using multiplier = #{multiplier}"

  timings = []

  2.times do |t|
    start = Time.now
    Integer(1_000_000 * multiplier).times do |n|
      garbage_var = (2 ** 2) + n
      garbage_writer = Garbage.new.write(garbage_var)
      garbage_writer.to_s
    end
    timings << Time.now - start
  end

  $stderr.puts <<-EOF

  WARMUP:   #{timings.first}
  DURATION: #{timings.last}
  EOF
end

if $0 == __FILE__
  main
end