Benchmark sobre uso de memória Ruby Module vs Class

bench.rb

# Gem: https://github.com/SamSaffron/memory_profiler

##### Benchmark vendo memória de um módulo
require "memory_profiler"

MemoryProfiler.start

module Teste
  extend self

  def oi
    "teste"
  end
end

Teste.oi

report = MemoryProfiler.stop
report.pretty_print

Total allocated: 116315 bytes (1926 objects)
Total retained:  2606 bytes (31 objects)


##### Benchmark vendo memória de uma classe
require "memory_profiler"

MemoryProfiler.start

class Teste
  def self.oi
    "teste"
  end
end

Teste.oi

report = MemoryProfiler.stop
report.pretty_print

Total allocated: 102987 bytes (1699 objects)
Total retained:  2502 bytes (29 objects)