require 'benchmark'

def bench_array(bm)
  arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20]
  bm.report("10m array == array, 20 Fixnum array") do
    i = 0
    while i < 10_000_000
      arr == arr
      i+=1
    end
  end

  bm.report("2m array == array.dup, 20 Fixnum array") do
    i = 0
    while i < 2_000_000
      arr == arr.dup
      i+=1
    end
  end

  arr3 = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20]
  bm.report("10m array == array, 200 Fixnum array") do
    i = 0
    while i < 10_000_000
      arr3 == arr3
      i+=1
    end
  end

  bm.report("2m array == array.dup, 200 Fixnum array") do
    i = 0
    while i < 2_000_000
      arr3 == arr3.dup
      i+=1
    end
  end
end

if $0 == __FILE__
  if ARGV[0]
    ARGV[0].to_i.times {
      Benchmark.bm(40) {|bm| bench_array(bm)}
    }
  else
    Benchmark.bmbm {|bm| bench_array(bm)}
  end
end