json<->marshal loading in ruby1.8<->ruby1.9

gistfile1.rb

require 'json'

MY_JSON_FILE = File.open('big_json.json').read
MY_MARSHAL_FILE = File.open('big_json.dat').read

class FileLoader

  def load_via_json
    JSON.parse(MY_JSON_FILE)
  end
	
  def load_via_marshal
    Marshal.load(MY_MARSHAL_FILE)
  end

end


def experiment(object, method, times)
  puts "calling #{method} x #{times} times..."
	
  start = Time.now.to_f
  times.times{ object.send(method) }
  finish = Time.now.to_f
	
  duration = finish-start
  puts "foobar: %.2fs (%.2f/s) [%.6f]" % [
    duration, # time taken for n loads
    (times / duration), # loads per second
    (duration / times) # time per load
  ]	
	
  duration / times 
end


results = Hash.new

5.times do
  %w(load_via_json load_via_marshal).each do |m| 
    result = experiment(FileLoader.new, m.intern, 1000) 
    results[m] ||= Array.new
    results[m] << result
  end
end

puts nil
results.each do |k, r|
  avg = r.inject(0){ |memo, v| memo += v } / r.length
  puts "avg: %.6fs | %s" % [avg, k]
end

# /home/paul/testfoo> ll big_json*
# -rw-r--r-- 1 paul paul 335K 2011-07-05 00:09 big_json.dat
# -rw-r--r-- 1 paul paul 330K 2011-07-05 00:10 big_json.json

# http://falbala.23loc.com/~paul/big_json.json

# /home/paul/testfoo> ruby1.9 bench.rb
# calling load_via_json x 1000 times...
# foobar: 3.00s (333.63/s) [0.002997]
# calling load_via_marshal x 1000 times...
# foobar: 3.09s (323.26/s) [0.003093]
# calling load_via_json x 1000 times...
# foobar: 2.96s (337.93/s) [0.002959]
# calling load_via_marshal x 1000 times...
# foobar: 3.10s (322.45/s) [0.003101]
# calling load_via_json x 1000 times...
# foobar: 2.96s (337.70/s) [0.002961]
# calling load_via_marshal x 1000 times...
# foobar: 3.09s (323.62/s) [0.003090]
# calling load_via_json x 1000 times...
# foobar: 2.96s (338.26/s) [0.002956]
# calling load_via_marshal x 1000 times...
# foobar: 3.10s (322.53/s) [0.003100]
# calling load_via_json x 1000 times...
# foobar: 2.97s (336.92/s) [0.002968]
# calling load_via_marshal x 1000 times...
# foobar: 3.09s (323.23/s) [0.003094]
# 
# avg: 0.002968s | load_via_json
# avg: 0.003096s | load_via_marshal

# /home/paul/testfoo> ruby1.8 bench.rb
# calling load_via_json x 1000 times...
# foobar: 3.26s (307.18/s) [0.003255]
# calling load_via_marshal x 1000 times...
# foobar: 2.46s (405.68/s) [0.002465]
# calling load_via_json x 1000 times...
# foobar: 2.71s (368.53/s) [0.002713]
# calling load_via_marshal x 1000 times...
# foobar: 2.47s (404.14/s) [0.002474]
# calling load_via_json x 1000 times...
# foobar: 2.73s (366.47/s) [0.002729]
# calling load_via_marshal x 1000 times...
# foobar: 2.46s (406.39/s) [0.002461]
# calling load_via_json x 1000 times...
# foobar: 2.73s (366.52/s) [0.002728]
# calling load_via_marshal x 1000 times...
# foobar: 2.46s (405.74/s) [0.002465]
# calling load_via_json x 1000 times...
# foobar: 2.74s (364.92/s) [0.002740]
# calling load_via_marshal x 1000 times...
# foobar: 2.49s (401.58/s) [0.002490]
# nil
# avg: 0.002471s | load_via_marshal
# avg: 0.002833s | load_via_json

# /home/paul/testfoo> ruby1.8 -v
# ruby 1.8.7 (2009-06-12 patchlevel 174) [i486-linux]

# /home/paul/testfoo> ruby1.9 -v
# ruby 1.9.0 (2008-06-20 revision 17482) [i486-linux]