import time
import sys

def timeit(N=5000, version=''):
    if version == '':
        from xml.dom import minidom
    else:
        module = 'minidom_%s' % version
        minidom = __import__(module, fromlist=[''])

    doc = minidom.getDOMImplementation().createDocument(None, 'root', None)
    root = doc.documentElement
    last = doc.createElement('last')
    root.appendChild(last)

    t0 = time.time()
    for i in range(N):
        node = doc.createElement('item')
        node.setAttribute('id', str(i))
        root.insertBefore(node, last)

    print '%stime for %d iterations: %f' % (version, N, time.time()-t0)

versions = sys.argv[1:]
if not versions:
    versions = ['']

for v in versions:
    timeit(version=v)