gistfile1.txt

rb(main):008:0> a = 0
=> 0
irb(main):009:0> b = 1
=> 1
irb(main):010:0> Benchmark.bm {|x| x.report { 100000.times { a.zero? } } }
      user     system      total        real
  0.030000   0.000000   0.030000 (  0.020547)
=> true
irb(main):011:0> Benchmark.bm {|x| x.report { 100000.times { b.zero? } } }
      user     system      total        real
  0.020000   0.010000   0.030000 (  0.023609)
=> true
irb(main):012:0> Benchmark.bm {|x| x.report { 100000.times { a == 0 } } }
      user     system      total        real
  0.040000   0.000000   0.040000 (  0.035733)
=> true
irb(main):013:0> Benchmark.bm {|x| x.report { 100000.times { b == 0 } } }
      user     system      total        real
  0.030000   0.000000   0.030000 (  0.027180)
=> true