Benchmark for Array#empty? vs Array#any?

array.rb

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

TIMES = 10_000_000
EMPTY_ARRAY  = [   ]
FILLED_ARRAY = [ 1 ]


Benchmark.bm(30) do |b|
  b.report "! Array#empty? with empty array" do
    TIMES.times do |i|
      !EMPTY_ARRAY.empty?
    end
  end

  b.report "! Array#empty? with filled array" do
    TIMES.times do |i|
      !FILLED_ARRAY.empty?
    end
  end

  b.report "Array#any? with empty array" do
    TIMES.times do |i|
      EMPTY_ARRAY.any?
    end
  end

  b.report "Array#any? with filled array" do
    TIMES.times do |i|
      FILLED_ARRAY.any?
    end
  end
end

__END__
                                        user     system      total        real
! Array#empty? with empty array     2.480000   0.000000   2.480000 (  2.476914)
! Array#empty? with filled array    2.490000   0.000000   2.490000 (  2.490273)
Array#any? with empty array         4.210000   0.000000   4.210000 (  4.229243)
Array#any? with filled array        8.640000   0.010000   8.650000 (  8.661541)