gistfile1.rb

require 'rubygems'
require 'barby'
require 'barby/outputter/cairo_outputter'
require 'rbench'

dimensions = {:height => 70, :margin => 10}
barcode = Barby::Code128C.new('081300010000102771000000000000500000000084')

TIMES = 1000

puts Benchmark.measure {
  TIMES.times do
    File.open('cairo.png', 'w') {|f|
      f.write barcode.to_png(dimensions)
    }
  end
}

require "./chunky_png_outputter"

puts Benchmark.measure {
  TIMES.times do
    File.open('chunky.png', 'w'){|f|
      f.write barcode.to_canvas(dimensions).to_datastream
    }
  end
}


$ ruby cairo.rb 
/Users/miloops/.rvm/gems/ruby-1.9.2-p0/gems/rbench-0.2.3/lib/rbench/group.rb:4: warning: undefining `object_id' may cause serious problems
/Users/miloops/.rvm/gems/ruby-1.9.2-p0/gems/rbench-0.2.3/lib/rbench/report.rb:4: warning: undefining `object_id' may cause serious problems
  4.560000   0.200000   4.760000 (  5.734010)
 63.490000   0.530000  64.020000 ( 70.310717)