json encoding an image 100 times by default

gistfile1.rb

# Loads a random papers image and encodes to to a base64 string and put's it into a json and
# # then decodes it a set amount of times.
 # usage: ruby json_decoding.rb [NUM_RUNS]
 require 'json' 
 require 'base64'

 if ARGV[0]
   n = ARGV[0].to_i
   else
     n = 100
     end
      
      json = JSON.generate({:image => Base64.strict_encode64(File.read("./something.jpg"))})
      n.times do |i|
        JSON.load json
        end
        GC.start