Find out ruby string generation

profile_string_generation.rb

require 'pp'

def profile
  old_strs = ObjectSpace.count_objects[:T_STRING]
  old_objs = GC.stat[:total_allocated_objects]
  
  yield.tap do
    new_strs = ObjectSpace.count_objects[:T_STRING]
    new_objs = GC.stat[:total_allocated_objects]

    puts <<-STR
Total allocated objects: #{new_objs - old_objs}
Total strings:           #{new_strs - old_strs}
    STR
  end
end