require 'mongoid'
require 'benchmark'
require 'yajl/json_gem'

ENV['MONGOID_ENV'] = 'development'

Mongoid.load!("config/mongoid.yml")

class Facility
  include Mongoid::Document
  include Mongoid::Timestamps

  field :name,            :type => String
  field :location,        :type => String

end

@facilities = Facility.all.limit(50).entries

Benchmark.bm do |x|
  x.report("Mongoid") { @a = @facilities.to_json }
  x.report("Parse  ") { @b = JSON.parse(@a) }
  x.report("Encode ") { @b.to_json }
  x.report("Encode ") { Yajl::Encoder.encode(@facilities) }
end

       user     system      total        real
Mongoid  0.260000   0.000000   0.260000 (  0.262572)
Parse    0.020000   0.000000   0.020000 (  0.021703)
Encode   0.010000   0.000000   0.010000 (  0.006516)
Encode   0.220000   0.000000   0.220000 (  0.238196)