Performance comparison of different ruby serializer methods

serializer_benchmarks.rb

# sudo gem install bson
# sudo gem install bson_ext
# sudo gem install yajl-ruby
# sudo gem install json
# sudo gem install msgpack

require 'rubygems'
require 'benchmark'
require 'yaml'
require 'bson'
require 'json'
require 'yajl'
require 'msgpack'

def encode(msg, format)
  case format
  when :yaml
    str = msg.to_yaml
  when :binary
    str = Marshal.dump(msg)
  when :json
    str = JSON.generate(msg)
  when :yajl
    str = Yajl::Encoder.encode(msg)
  when :bson
    str = BSON.serialize(msg).to_s
  when :msgpack
    str = MessagePack.pack(msg)
  end
  str
end

def decode(str, format)  
  msg = nil
  case format
  when :yaml
    msg = YAML.load(str)
  when :binary
    msg = Marshal.load(str)
  when :json
    msg = JSON.parse(str)
  when :yajl
    msg = Yajl::Parser.parse(str)
  when :bson
    msg = BSON.deserialize(str)
  when :msgpack
    msg = MessagePack.unpack(str)
  end
  msg
end

SAMPLES = 5_000
obj = {
  :name => "Fredrick Smith",
  :quantity => 1_000_000,
  :addresses => {
    :address1 => "12 Heather Street, Parnell, Auckland, New Zealand",
    :address2 => "1 Queen Street, CBD, Auckland, New Zealand"
  }
}

Benchmark.bmbm do |r|
  r.report("Marshal") do
    SAMPLES.times do
      decode(encode(obj, :binary), :binary)
    end
  end

  r.report("JSON (built-in ruby 1.9.2)") do
    SAMPLES.times do
      decode(encode(obj, :json), :json)
    end
  end

  r.report("JSON (using Yajl)") do
    SAMPLES.times do
      decode(encode(obj, :yajl), :yajl)
    end
  end

  r.report("BSON") do
    SAMPLES.times do
      decode(encode(obj, :bson), :bson)
    end
  end

  r.report("YAML") do
    SAMPLES.times do
      decode(encode(obj, :yaml), :yaml)
    end
  end

  r.report("MessagePack") do
    SAMPLES.times do
      msg = decode(encode(obj, :msgpack), :msgpack)
    end
  end

end

# Results
# -------
#                                  user     system      total        real
# Marshal                      0.090000   0.000000   0.090000 (  0.097608)
# JSON (built-in ruby 1.9.2)   0.250000   0.000000   0.250000 (  0.261509)
# JSON (using Yajl)            0.110000   0.020000   0.130000 (  0.121666)
# BSON                         0.260000   0.000000   0.260000 (  0.263860)
# YAML                         1.160000   0.020000   1.180000 (  1.174353)
# MessagePack                  0.030000   0.000000   0.030000 (  0.030526)