Contents

require 'rubygems'
require 'bundler/setup'

require 'benchmark'
require 'chunky_png'

files = ['pixelstream_reference.png', 'operations.png', 'clock.png']

def encode_png(image, constraints = {})
  filesize = nil
  time = Benchmark.realtime { filesize = image.to_blob(constraints).bytesize }
  [filesize, time]
end

files.each do |file|
  filename = File.join(File.dirname(__FILE__), '..', 'spec', 'resources', file)
  image = ChunkyPNG::Canvas.from_file(filename)

  puts "#{file}: #{image.width}x#{image.height} - #{image.palette.size} colors"
  puts "------------------------------------------------"
  puts "<default>         : %8d bytes in %0.4fs" % encode_png(image)
  puts ":no_compression   : %8d bytes in %0.4fs" % encode_png(image, :no_compression)
  puts ":fast_rgba        : %8d bytes in %0.4fs" % encode_png(image, :fast_rgba)
  puts ":fast_rgb         : %8d bytes in %0.4fs" % encode_png(image, :fast_rgb)
  puts ":good_compression : %8d bytes in %0.4fs" % encode_png(image, :good_compression)
  puts ":best_compression : %8d bytes in %0.4fs" % encode_png(image, :best_compression)
  puts
end

Version data entries

9 entries across 8 versions & 3 rubygems

Version	Path
chunky_png-1.3.11	benchmarks/filesize_benchmark.rb
chunky_png-1.3.10	benchmarks/filesize_benchmark.rb
chunky_png-1.3.9	benchmarks/filesize_benchmark.rb
arcabouco-0.2.13	vendor/bundle/gems/chunky_png-1.3.8/benchmarks/filesize_benchmark.rb
arcabouco-0.2.13	vendor/bundle/gems/chunky_png-1.3.6/benchmarks/filesize_benchmark.rb
chunky_png-1.3.8	benchmarks/filesize_benchmark.rb
second_step-0.1.2	secondstep-notify-1.0.0-osx/lib/ruby/lib/ruby/gems/2.2.0/gems/chunky_png-1.3.7/benchmarks/filesize_benchmark.rb
chunky_png-1.3.7	benchmarks/filesize_benchmark.rb
chunky_png-1.3.6	benchmarks/filesize_benchmark.rb