Benchmark of JRuby start-up time with arguments

1. benchmark.rb

require 'benchmark'

def test(args)
  5.times do
    `jruby test.rb #{args}`
  end
end

Benchmark.bm(7) do |x|
  x.report("default     :") {test ""}
  x.report("-X          :") {test "-X"}
  x.report("-D          :") {test "-D"}
  x.report("-32         :") {test "-32"}
  x.report("-d32        :") {test "-d32"}
  x.report("-X-D-32-d32 :") {test "-X-D-32-d32"}
end

2. test.rb

require 'java'
puts "test"

3. shell

$ ruby benchmark.rb
             user     system      total        real
default     :  0.010000   0.010000  13.960000 (  9.595538)
-X          :  0.010000   0.010000  13.790000 (  8.985453)
-D          :  0.000000   0.010000  13.670000 (  8.680449)
-32         :  0.000000   0.010000  13.280000 (  8.599478)
-d32        :  0.010000   0.000000   6.670000 (  5.797627)
-X-D-32-d32 :  0.000000   0.010000  13.710000 (  8.736142)