simple sort benchmarking between jruby 1.7.1 and ruby 1.9.3

benchmark.rb

require 'benchmark'

array = (1..100000).map { rand }

Benchmark.bmbm do |x|
  x.report("sort!") { (0..20).each { array.dup.sort! }  }
  x.report("sort")  { (0..20).each { array.dup.sort! }  }
end

result.txt

ruby 1.9.3

Rehearsal -----------------------------------------
sort!   4.170000   0.010000   4.180000 (  4.183763)
sort    4.190000   0.000000   4.190000 (  4.202959)
-------------------------------- total: 8.370000sec

            user     system      total        real
sort!   4.140000   0.010000   4.150000 (  4.154430)
sort    4.130000   0.000000   4.130000 (  4.140072)

jruby 1.7.1

Rehearsal -----------------------------------------
sort!   1.800000   0.010000   1.810000 (  1.585000)
sort    1.370000   0.020000   1.390000 (  1.366000)
-------------------------------- total: 3.200000sec

            user     system      total        real
sort!   1.320000   0.000000   1.320000 (  1.327000)
sort    1.330000   0.020000   1.350000 (  1.351000)