Testing zlib compression on strings

zlib_test.rb

#!/usr/bin/env ruby
# untitled.rb

# Created by Paolo Bosetti on 2011-03-30.
# Copyright (c) 2011 University of Trento. All rights reserved.

require "zlib"

str = ""
100.times do |i|
  str << ("%d\t%9.3f\t%9.3f\n" % [i, i.to_f, i.to_f ** 2])
end

level = [Zlib::NO_COMPRESSION, Zlib::BEST_SPEED, Zlib::BEST_COMPRESSION, Zlib::DEFAULT_COMPRESSION] + (0..9).to_a

strz = ""
level.each do |l|
  strz = Zlib::Deflate.deflate(str, l)
  puts "level #{l}: #{str.size} -> #{strz.size}"
end

puts Zlib::Inflate.inflate(strz)