add_callback benchmark

gistfile1.py

import optparse
import time

from tornado.ioloop import IOLoop

def main(iterations):
    loop = IOLoop.instance()
    counter = [0]
    def callback(*args):
        counter[0] += 1
        if counter[0] < iterations:
            loop.add_callback(callback)
        else:
            loop.stop()
    loop.add_callback(callback)
    loop.start()

if __name__ == '__main__':
    parser = optparse.OptionParser()
    parser.add_option('-n', dest='num_iterations', type='int', default=100000, help='Number of iterations to run')
    opts, args = parser.parse_args()
    t0 = time.time()
    main(opts.num_iterations)
    print time.time() - t0