@haypo: Oh. Not:
if sys.maxsize > _4G:
# (64 bits system) crc32() and adler32() stores the buffer size into an
# int, the maximum filesize is INT_MAX (0x7FFFFFFF)
filesize = 0x7FFFFFFF
crc_res = 0x709418e7
adler_res = -2072837729
else:
# (32 bits system) On a 32 bits OS, a process cannot usually address
# more than 2 GB, so test only 1 GB
filesize = _1G
crc_res = 0x2b09ee11
adler_res = -1002962529
self.assertEqual(zlib.crc32(m), self.crc_res)
self.assertEqual(zlib.adler32(m), self.adler_res)
I'm not that fast.