~/NetBeansProjects/jruby ➔ jruby -J-server -rbenchmark -e "def foo; if false; end; end; Benchmark.bmbm {|bm| bm.report { 10_000_000.times { foo } } }"
Rehearsal ------------------------------------
   2.624000   0.000000   2.624000 (  2.624000)
--------------------------- total: 2.624000sec

       user     system      total        real
   1.927000   0.000000   1.927000 (  1.928000)
~/NetBeansProjects/jruby ➔ ruby -rbenchmark -e "def foo; if false; end; end; Benchmark.bmbm {|bm| bm.report { 10_000_000.times { foo } } }"
Rehearsal ------------------------------------
   3.430000   0.000000   3.430000 (  3.430940)
--------------------------- total: 3.430000sec

       user     system      total        real
   3.460000   0.000000   3.460000 (  3.463657)
~/NetBeansProjects/jruby ➔ ../ruby1.9/ruby -I ../ruby1.9/lib -rbenchmark -e "def foo; if false; end; end; Benchmark.bmbm {|bm| bm.report { 10_000_000.times { foo } } }"
Rehearsal ------------------------------------
   2.070000   0.000000   2.070000 (  2.080869)
--------------------------- total: 2.070000sec

       user     system      total        real
   2.070000   0.010000   2.080000 (  2.077726)