Cheap Benchmark

bm.rb

class BM
  def self.bm(name)
    @stats ||= {}
    @stats[name] ||= { time: 0, times_called: 0, avg_time: 0 }
    start_time = Time.zone.now
    yield
    @stats[name][:time] += (Time.zone.now - start_time)
    @stats[name][:times_called] += 1
    @stats[name][:avg_time] = @stats[name][:time].to_f / @stats[name][:times_called]
  end

  def self.stats
    @stats
  end
end

usage.rb

BM.bm 'code description' do
  your_code
  doing_things
end

p BM.stats