perf_file.rb

#!/usr/bin/env ruby -wW1

$: << '.'
$: << '../lib'
$: << '../ext'

if __FILE__ == $0
  if (i = ARGV.index('-I'))
    x,path = ARGV.slice!(i, 2)
    $: << path
  end
end

require 'optparse'
require 'oj'
require 'perf'

$indent = 0
$iter = 1
$size = 1

opts = OptionParser.new

opts.on("-r", "read")                                       { do_read = true }
opts.on("-c", "--count [Int]", Integer, "iterations")       { |i| $iter = i }
opts.on("-i", "--indent [Int]", Integer, "indent")          { |i| $indent = i }
opts.on("-s", "--size [Int]", Integer, "size in Mbytes")    { |s| $size = s }

opts.on("-h", "--help", "Show this display")                { puts opts; Process.exit!(0) }
files = opts.parse(ARGV)

$obj = {
  'a' => 'Alpha', # string
  'b' => true,    # boolean
  'c' => 12345,   # number
  'd' => [ true, [false, [-123456789, nil], 3.9676, ['Something else.', false], nil]], # mix it up array
  'e' => { 'zero' => nil, 'one' => 1, 'two' => 2, 'three' => [3], 'four' => [0, 1, 2, 3, 4] }, # hash
  'f' => nil,     # nil
  'g' => 12345678901234567890123456789, #_bignum
  'h' => { 'a' => { 'b' => { 'c' => { 'd' => {'e' => { 'f' => { 'g' => nil }}}}}}}, # deep hash, not that deep
  'i' => [[[[[[[nil]]]]]]]  # deep array, again, not that deep
}

json = Oj.dump($obj, :indent => $indent)
cnt = ($size * 1024 * 1024 + json.size) / json.size
cnt = 1 if 0 == $size

filename = 'tmp.json'
File.open(filename, "w") { |f|
  cnt.times do
    Oj.to_stream(f, $obj, :indent => $indent)
  end
}

Oj.default_options = { :mode => :strict, :indent => $indent }

puts '-' * 80
puts "Read from #{cnt * json.size / (1024 * 1024)} Mb file Performance"
perf = Perf.new()
perf.add('Oj.load_file', '') { Oj.load_file(filename) }
perf.add('Oj.load(string)', '') { Oj.load(File.read(filename)) }
perf.add('Oj.load(file)', '') { File.open(filename, 'r') { |f| Oj.load(f) } }
perf.run($iter)