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$LOAD_PATH.unshift File.expand_path(File.dirname(__FILE__) + '/..')
$LOAD_PATH.unshift File.expand_path(File.dirname(__FILE__) + '/../lib')

require 'rubygems'
require 'benchmark'
require 'yajl'
require 'stringio'
begin
  require 'json'
rescue LoadError
end
begin
  require 'psych'
rescue LoadError
end
begin
  require 'active_support'
rescue LoadError
end

filename = ARGV[0] || 'benchmark/subjects/ohai.json'
hash = File.open(filename, 'rb') { |f| Yajl::Parser.new.parse(f.read) }

times = ARGV[1] ? ARGV[1].to_i : 1000
puts "Starting benchmark encoding #{filename} #{times} times\n\n"
Benchmark.bmbm { |x|
  io_encoder = Yajl::Encoder.new
  string_encoder = Yajl::Encoder.new

  x.report("Yajl::Encoder#encode (to an IO)") {
    times.times {
      io_encoder.encode(hash, StringIO.new)
    }
  }
  x.report("Yajl::Encoder#encode (to a String)") {
    times.times {
      output = string_encoder.encode(hash)
    }
  }
  if defined?(JSON)
    x.report("JSON.generate") {
      times.times {
        JSON.generate(hash)
      }
    }
  end
  if defined?(Psych)
    x.report("Psych.to_json") {
      times.times {
        Psych.to_json(hash)
      }
    }
    if defined?(Psych::JSON::Stream)
      x.report("Psych::JSON::Stream") {
        times.times {
          io = StringIO.new
          stream = Psych::JSON::Stream.new io
          stream.start
          stream.push hash
          stream.finish
        }
      }
    end
  end
  if defined?(ActiveSupport::JSON)
    x.report("ActiveSupport::JSON.encode") {
      times.times {
        ActiveSupport::JSON.encode(hash)
      }
    }
  end
}
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