import time

from twisted.internet import reactor
from twisted.internet.threads import deferToThread

def deferme():
  return

def benchmark(numcalls):
  start = time.time()
  for i in xrange(numcalls):
    deferToThread(deferme)
  elapsed = time.time() - start

  print ('%fms per deferToThread() call - %i calls in %f seconds'
         % (elapsed / numcalls * 1000.0, numcalls, elapsed))

  reactor.stop()

if __name__ == '__main__':
  reactor.callLater(0.3, benchmark, 10000)
  reactor.run()