$ cat incl.rb <\/div>
require 'benchmark'<\/div>
a=[]; 10_000.times { a << rand(100000) }<\/div>
Benchmark.bm { |x| <\/div>
x.report("include?") { 10_000.times { |i| a.include?(i) } } <\/div>
x.report("& operat") { 10_000.times { |i| !(a & [i]).empty? } } <\/div>
}<\/div>
<\/div>
$ jruby incl.rb <\/div>
include? 3.508000 0.000000 3.508000 ( 3.419000)<\/div>
& operat 1.820000 0.000000 1.820000 ( 1.820000)<\/div>
<\/div>
$ ruby incl.rb <\/div>
include? 6.820000 0.020000 6.840000 ( 6.907210)<\/div>
& operat 1.730000 0.000000 1.730000 ( 1.742477)<\/div>
<\/div>
$ ruby19 incl.rb <\/div>
include? 5.600000 0.020000 5.620000 ( 5.670348)<\/div>
& operat 2.500000 0.010000 2.510000 ( 2.533389)<\/div>
<\/div><\/pre><\/div>\n \n <\/div>\n\n