object_counter.rb

# Object Counter for use in example on vipulnsward.com about Frozen 
# Strings in Ruby
module ObjectCounter
  def self.count
    GC.disable
    before_count = ObjectSpace.count_objects
    yield
    after_count  = ObjectSpace.count_objects
    after_count.each do |k,v|
      after_count[k] = v.to_i - before_count[k].to_i
    end
    GC.enable
    after_count
  end
end