creating_set.rb

require 'benchmark/ips'
require 'set'

ARRAY_SIZE = 10

class TestBench
  def array
    Array((1..ARRAY_SIZE))
  end

  def set
    Set.new((1..ARRAY_SIZE))
  end

  def slow
    array.include?(rand(ARRAY_SIZE))
  end

  def fast
    set.include?(rand(ARRAY_SIZE))
  end
end

test = TestBench.new

Benchmark.ips do |x|
  x.report("set include") { test.fast }
  x.report("array include") { test.slow }
  x.compare!
end