tap or not tap

gistfile1.rb

#!/usr/bin/env ruby
require 'benchmark'

N = 1000000

class TestingObjectTap
  def ugly  
    results = {}  
    [:x, :y, :z].each do |letter|  
      results[letter] = rand(100)  
    end  
    results  
  end  
  def sexy  
    returning({}) do |results|  
      [:x, :y, :z].each do |letter|  
        results[letter] = rand(100)  
      end  
    end  
  end  
  def returning(obj)  
    yield(obj)  
    obj  
  end
  def w_tap  
    {}.tap do |results|  
      [:x, :y, :z].each do |letter|  
        results[letter] = rand(100)  
      end  
    end  
  end  
end

Benchmark.bmbm do |x|

  object = TestingObjectTap.new

  x.report('ugly') { N.times {
    object.ugly
  } }
    
  x.report('sexy') { N.times {
    object.sexy
  } }

  x.report('sexy') { N.times {
    object.w_tap
  } }
  
end

#            user     system      total        real
# ugly   2.820000   0.030000   2.850000 (  3.093643)
# sexy   2.910000   0.030000   2.940000 (  3.229084)
# sexy   3.000000   0.040000   3.040000 (  3.269924)