Benchmarking ruby delegate

delegate_10_benchmark.rb

require 'benchmark'

class A
  def aa
    42^3344
  end
end

class B
  def aa
    a.aa
  end
  def a
    @a ||= A.new
  end
end

class C
  delegate :aa, to: :a

  def a
    @a ||= A.new
  end
end


time = Benchmark.measure do
  10000000.times { B.new.aa }
end
puts "B: #{time}"

time = Benchmark.measure do
  10000000.times { C.new.aa }
end
puts "C: #{time}"

# =>   B:   9.170000   0.030000   9.200000 (  9.257936)
# =>   C:  11.480000   0.020000  11.500000 ( 11.548755)

delegate_1_benchmark.rb

require 'benchmark'

class A
  def aa
    222**222
  end
end

class B
  def aa
    a.aa
  end
  def a
    @a ||= A.new
  end
end

class C
  delegate :aa, to: :a

  def a
    @a ||= A.new
  end
end


time = Benchmark.measure do
  1000000.times { [*nil] }
end
puts "B: #{time}"

time = Benchmark.measure do
  1000000.times { C.new.aa }
end
puts "C: #{time}"

# =>   B:   6.440000   0.110000   6.550000 (  6.616437)
# =>   C:   6.770000   0.040000   6.810000 (  6.848812)