Take a BM

output

r1.9.3 ~/workarea/take_a_bm $ ruby take_a_bm.rb 
Thread.current.object_id:70331712734240   0.000000   0.000000   0.000000 (  1.001500)
Thread.current.object_id:70331712733480   0.000000   0.000000   0.000000 (  1.001537)
Thread.current.object_id:70331712733240   0.000000   0.000000   0.000000 (  1.001746)
Thread.current.object_id:70331712732600   0.000000   0.000000   0.000000 (  1.001865)
Thread.current.object_id:70331712731560   0.000000   0.000000   0.000000 (  1.002109)
Thread.current.object_id:70331712733660   0.000000   0.000000   0.000000 (  1.000823)
Thread.current.object_id:70331712733400   0.000000   0.000000   0.000000 (  1.002661)
Thread.current.object_id:70331712733000   0.000000   0.000000   0.000000 (  1.002736)
Thread.current.object_id:70331712729480   0.000000   0.000000   0.000000 (  1.002143)
Thread.current.object_id:70331712728980   0.000000   0.000000   0.000000 (  1.002188)
Thread.current.object_id:70331712728880   0.000000   0.000000   0.000000 (  1.002407)
Thread.current.object_id:70331712727960   0.000000   0.000000   0.000000 (  1.002431)
Thread.current.object_id:70331712732840   0.000000   0.000000   0.000000 (  1.003648)
Thread.current.object_id:70331712732200   0.000000   0.000000   0.000000 (  1.002072)
Thread.current.object_id:70331712731160   0.000000   0.000000   0.000000 (  1.003479)
Thread.current.object_id:70331712729720   0.000000   0.000000   0.000000 (  1.003322)
Thread.current.object_id:70331712728800   0.000000   0.010000   0.010000 (  1.003237)
Thread.current.object_id:70331712727320   0.000000   0.010000   0.010000 (  1.003097)
Thread.current.object_id:70331712729400   0.000000   0.010000   0.010000 (  1.003734)
Thread.current.object_id:70331712732520   0.000000   0.010000   0.010000 (  1.004570)
Thread.current.object_id:70331712728560   0.000000   0.010000   0.010000 (  1.003859)
Thread.current.object_id:70331721364060   0.000000   0.010000   0.010000 (  2.001248)
Thread.current.object_id:70331721292420   0.000000   0.010000   0.010000 (  2.001208)
Thread.current.object_id:70331712731480   0.000000   0.010000   0.010000 (  2.000716)
Thread.current.object_id:70331712743460   0.000000   0.010000   0.010000 (  2.001051)
Thread.current.object_id:70331712733840   0.000000   0.010000   0.010000 (  2.001384)
Thread.current.object_id:70331712732440   0.000000   0.010000   0.010000 (  2.001261)
Thread.current.object_id:70331712730060   0.000000   0.010000   0.010000 (  2.000953)
Thread.current.object_id:70331712729880   0.000000   0.010000   0.010000 (  2.000976)
Thread.current.object_id:70331712729980   0.000000   0.010000   0.010000 (  2.001152)
Thread.current.object_id:70331712728720   0.000000   0.010000   0.010000 (  2.000938)
Thread.current.object_id:70331712727240   0.000000   0.010000   0.010000 (  2.000733)
Thread.current.object_id:70331712729560   0.000000   0.010000   0.010000 (  2.001325)
Thread.current.object_id:70331712732360   0.000000   0.010000   0.010000 (  2.002013)
Thread.current.object_id:70331712728640   0.000000   0.010000   0.010000 (  2.001267)
Thread.current.object_id:70331712727480   0.000000   0.010000   0.010000 (  2.001116)
Thread.current.object_id:70331712729300   0.000000   0.010000   0.010000 (  2.001593)
Thread.current.object_id:70331721325460   0.000000   0.010000   0.010000 (  2.002926)
Thread.current.object_id:70331721364300   0.000000   0.010000   0.010000 (  3.000109)
Thread.current.object_id:70331712730660   0.000000   0.010000   0.010000 (  3.000207)
Thread.current.object_id:70331712734000   0.000000   0.010000   0.010000 (  3.001006)
Thread.current.object_id:70331712733920   0.010000   0.010000   0.020000 (  3.001121)
Thread.current.object_id:70331712732120   0.010000   0.010000   0.020000 (  3.000868)
Thread.current.object_id:70331712731720   0.010000   0.010000   0.020000 (  3.000873)
Thread.current.object_id:70331712731320   0.010000   0.010000   0.020000 (  3.000886)
Thread.current.object_id:70331712731000   0.010000   0.010000   0.020000 (  3.000907)
Thread.current.object_id:70331712730420   0.010000   0.010000   0.020000 (  3.000882)
Thread.current.object_id:70331712730580   0.010000   0.010000   0.020000 (  3.001006)
Thread.current.object_id:70331721364140   0.010000   0.010000   0.020000 (  3.002114)
Thread.current.object_id:70331721367100   0.000000   0.010000   0.010000 (  3.000893)
Thread.current.object_id:70331712733760   0.010000   0.010000   0.020000 (  3.001858)
Thread.current.object_id:70331712733080   0.010000   0.010000   0.020000 (  3.001819)
Thread.current.object_id:70331712730900   0.010000   0.010000   0.020000 (  3.001471)
Thread.current.object_id:70331712730820   0.010000   0.010000   0.020000 (  3.001566)
Thread.current.object_id:70331712730240   0.010000   0.010000   0.020000 (  3.001549)
Thread.current.object_id:70331712729220   0.010000   0.010000   0.020000 (  3.001350)
Thread.current.object_id:70331712728480   0.010000   0.010000   0.020000 (  3.001272)
Thread.current.object_id:70331712728140   0.010000   0.010000   0.020000 (  3.001296)
Thread.current.object_id:70331712727880   0.010000   0.010000   0.020000 (  3.001323)
Thread.current.object_id:70331712731880   0.010000   0.010000   0.020000 (  3.002304)
Thread.current.object_id:70331712731400   0.010000   0.010000   0.020000 (  3.002323)
Thread.current.object_id:70331712729800   0.010000   0.010000   0.020000 (  3.002082)
Thread.current.object_id:70331712728220   0.010000   0.010000   0.020000 (  3.001850)
Thread.current.object_id:70331712727640   0.010000   0.010000   0.020000 (  3.001837)
Thread.current.object_id:70331712730340   0.010000   0.010000   0.020000 (  3.002557)
Thread.current.object_id:70331712729140   0.010000   0.010000   0.020000 (  3.002318)
Thread.current.object_id:70331712734080   0.010000   0.010000   0.020000 (  3.003562)
Thread.current.object_id:70331712728400   0.010000   0.010000   0.020000 (  3.002420)
Thread.current.object_id:70331721291740   0.010000   0.010000   0.020000 (  4.000321)
Thread.current.object_id:70331712734320   0.010000   0.010000   0.020000 (  4.000466)
Thread.current.object_id:70331712734160   0.010000   0.010000   0.020000 (  4.000517)
Thread.current.object_id:70331712727160   0.010000   0.010000   0.020000 (  4.001049)
Thread.current.object_id:70331712732760   0.010000   0.010000   0.020000 (  4.000992)
Thread.current.object_id:70331712731640   0.010000   0.010000   0.020000 (  4.000998)
Thread.current.object_id:70331712731240   0.010000   0.010000   0.020000 (  4.001015)
Thread.current.object_id:70331712729640   0.010000   0.010000   0.020000 (  4.000750)
Thread.current.object_id:70331712732040   0.010000   0.010000   0.020000 (  4.001340)
Thread.current.object_id:70331712731960   0.010000   0.010000   0.020000 (  4.000949)
Thread.current.object_id:70331712730160   0.010000   0.010000   0.020000 (  4.001085)
Thread.current.object_id:70331712730500   0.010000   0.010000   0.020000 (  4.001323)
Thread.current.object_id:70331712728040   0.010000   0.010000   0.020000 (  4.000996)
Thread.current.object_id:70331712727400   0.010000   0.010000   0.020000 (  4.000977)
Thread.current.object_id:70331721364380   0.010000   0.010000   0.020000 (  4.001028)
Thread.current.object_id:70331712727560   0.010000   0.010000   0.020000 (  4.001222)
Thread.current.object_id:70331712728300   0.010000   0.010000   0.020000 (  4.001464)
Thread.current.object_id:70331721370260   0.010000   0.010000   0.020000 (  5.001081)
Thread.current.object_id:70331712733160   0.010000   0.010000   0.020000 (  5.001176)
Thread.current.object_id:70331712732680   0.010000   0.010000   0.020000 (  5.001361)
Thread.current.object_id:70331712732920   0.010000   0.010000   0.020000 (  5.001677)
Thread.current.object_id:70331712732280   0.010000   0.010000   0.020000 (  5.001693)
Thread.current.object_id:70331712731080   0.010000   0.010000   0.020000 (  5.001658)
Thread.current.object_id:70331712730740   0.010000   0.010000   0.020000 (  5.001752)
Thread.current.object_id:70331712729060   0.010000   0.010000   0.020000 (  5.001533)
Thread.current.object_id:70331712733580   0.010000   0.010000   0.020000 (  5.002648)
Thread.current.object_id:70331721364220   0.010000   0.010000   0.020000 (  5.003304)
Thread.current.object_id:70331712751800   0.010000   0.010000   0.020000 (  5.000782)
Thread.current.object_id:70331712727720   0.010000   0.010000   0.020000 (  5.001888)
Thread.current.object_id:70331712731800   0.010000   0.010000   0.020000 (  5.002925)
Thread.current.object_id:70331712733320   0.010000   0.010000   0.020000 (  5.003553)
Thread.current.object_id:70331712727800   0.010000   0.010000   0.020000 (  5.002197)

take_a_bm.rb

require "benchmark"

def my_bm sleepy_time
  bm = Benchmark.measure do
    sleep sleepy_time
  end
  puts "Thread.current.object_id:#{Thread.current.object_id} #{bm}"
end


n_threads = 100

threads = []
1.upto( n_threads ) do |n|
  threads << Thread.new{ my_bm rand(5)+1 }  
end

threads.each{ |t| t.join }