bench.rb

#! /usr/bin/ruby

require 'benchmark'
require 'yaml'

open("data1.txt", "w") do |io|
  5000.times do |i|
    io << "abcdefghijklmnopqrstuvwxyz\t#{i}\n"
  end
end

open("data1.yml", "w") do |io|
  5000.times do |i|
    io << "- - abcdefghijklmnopqrstuvwxyz\n  - #{i}\n"
  end
end

open("data2.yml", "w") do |io|
  5000.times do |i|
    io << "- key: abcdefghijklmnopqrstuvwxyz\n  value: #{i}\n"
  end
end

data = []
5000.times do |i|
  data << {"key" => "abcdefghijklmnopqrstuvwxyz", "value" => i}
end
open("data1.obj", "w") do |io|
  Marshal.dump(data, io)
end



def load_txt
  data = []
  open("data1.txt") do |io|
    io.each_line do |line|
      tmp = line.chomp.split(/\t/)
      tmp[1] = tmp[1].to_i
      data << tmp
    end
  end
end

# hash
def load_txt2
  data = []
  open("data1.txt") do |io|
    io.each_line do |line|
      tmp = line.chomp.split(/\t/)
      tmp[1] = tmp[1].to_i
      data << {"key" => tmp[0], "value" => tmp[1]}
    end
  end
end

def load_yml
  data = YAML.load_file("data1.yml")
end

def load_yml2
  data = YAML.load_file("data2.yml")
end

def load_marshal
  open("data1.obj") do |io|
    data = Marshal.load(io)
  end
end

n = 10
Benchmark.bm do |x|
  x.report("txt a") { n.times do; load_txt; end }
  x.report("txt h") { n.times do; load_txt2; end }
  x.report("yml a") { n.times do; load_yml; end }
  x.report("yml h") { n.times do; load_yml2; end }
  x.report("msl h") { n.times do; load_marshal; end }
end

gistfile2.txt

      user     system      total        real
txt a  0.290000   0.010000   0.300000 (  0.307217)
txt h  0.390000   0.010000   0.400000 (  0.419969)
yml a  0.440000   0.010000   0.450000 (  0.449777)
yml h  0.830000   0.010000   0.840000 (  0.869857)
msl h  0.220000   0.010000   0.230000 (  0.226806)