Show the heap and stack in action using ruby

ruby_memory_test.rb

class MyClass
  attr_writer :my_value
end

def my_function(i)
  return if i.zero?
  my_stack_var = MyClass.new
  # "Each slot is big enough to hold one Ruby object"
  puts "heap_free_slot -> #{GC.stat[:heap_free_slot]}, stack_size -> #{caller.size}"
  my_function(i-1)
end

my_function(5)

puts "Calling garbage collector..."
GC.start
puts "heap_free_slot -> #{GC.stat[:heap_free_slot]}, stack_size -> #{caller.size}"