Compressed sync payload experiment

#!/usr/local/bin/python

import sys
import zlib
import random
import time
import itertools

def sizeof_fmt(num, suffix='B'):
    for unit in ['','K','M','G','T','P','E','Z']:
        if abs(num) < 1024.0:
            return "%3.2f%s%s" % (num, unit, suffix)
        num /= 1024.0
    return "%.2f%s%s" % (num, 'Y', suffix)

if __name__ == "__main__":
    if len(sys.argv) != 2:
        # Remember, script name is always the first arg
        print "This script expects a single, integer list size argument"
        sys.exit(0)

    list_size = int(sys.argv[1])
    pairs = [(str(random.randint(100000,9999999)), ''.join([random.choice('0123456789abcdef') for _ in itertools.repeat(None, 8)])) for _ in itertools.repeat(None, list_size)]
    jsonified_pairs = ['"{}":"{}"'.format(id, ver) for (id, ver) in pairs]
    json = '{{"requireFullList":true,"knownRooms":[{{{0}}}]}}'.format(','.join(jsonified_pairs))

    # print json

    print 'Size before compression: {}'.format(sizeof_fmt(len(json)))

    t1 = time.clock()
    compressed_json = zlib.compress(json, 9)
    t2 = time.clock()

    print 'Size after compression: {}'.format(sizeof_fmt(len(compressed_json)))
    print 'Time to compress: {0:7.2f} ms'.format((t2-t1) * 1000)