Benchmark: Tap vs Non-Tap

benchmark.rb

require 'benchmark'

def tap_method
  result = rand.tap {}
end

def non_tap_method
  result = rand
  result
end

n = 100_000

Benchmark.bm(10) do |bm|
  bm.report('tap')      { n.times { tap_method } }
  bm.report('non-tap')  { n.times { no_tap_method } }
end

results.txt

                 user     system      total        real
tap          0.030000   0.000000   0.030000 (  0.029819)
non-tap      0.020000   0.000000   0.020000 (  0.018391)