ruby unique inserts using Set and Array

benchmark.ruby-set-and-array-unique-insert.rb

require 'benchmark'
require 'set'

NUMBERS = 5000.times.collect { rand(10) }

Benchmark.bmbm do |x|
  x.report("set") do
    set = Set.new
    NUMBERS.each do |number|
      set.add number
    end
    set.to_a
  end

  x.report("array-uniq") do
    array = []
    NUMBERS.each do |number|
      array << number
    end
    array.uniq
  end

  x.report("array-uniq!") do
    array = []
    NUMBERS.each do |number|
      array << number
    end
    array.uniq!
  end
end

__END__

ruby 2.1.0p0 (2013-12-25 revision 44422) [x86_64-darwin14.0]
Rehearsal -----------------------------------------------
          set           0.000000   0.000000   0.000000 (  0.001033)
array-uniq    0.000000   0.000000   0.000000 (  0.000716)
array-uniq!   0.000000   0.000000   0.000000 (  0.000682)
-------------------------------------- total: 0.000000sec

user     system      total        real
set           0.000000   0.000000   0.000000 (  0.000970)
array-uniq    0.000000   0.000000   0.000000 (  0.000751)
array-uniq!   0.000000   0.000000   0.000000 (  0.000704)