gistfile1.rb

class ThreadTest < Test::Unit::TestCase

  # ~ 340 microseconds per thread spin-up, regardless of `-J-Djruby.thread.pooling=[true|false]'
  def test_some_speeds

    @runs = 0
    def func
      @runs += 1
    end

    Benchmark.bm do |bm|
      bm.report do
        100000.times do
          t = Thread.new{ func() }
          t.join
        end
      end
    end

    puts @runs

  end

end