from __future__ import with_statement
import pickle
import time
filename = "pickle.dump"
# data = ([0]*10, 2**100, b"abcdef", "xyz")
data = [0] * 10
with open(filename, "wb") as f:
    start = time.time()
    pickle.dump(data, f)
    stop = time.time()
    print("dump: %.1f ms" % ((stop - start)*1000))

    print("tell(): %s" % f.tell())
    f.write(b"xxx")

with open(filename, "rb") as f:
    start = time.time()
    data2 = pickle.load(f)
    stop = time.time()
    print("load: %.1f ms" % ((stop - start)*1000))
    print("tell(): %s" % f.tell())
    tail = f.read()
    print("read()->%r" % tail)
# assert data == data2

# trunk: data=10^5:                dump=1043ms,  load=1511ms
# py3k:  data=10^5, prefetch=1:    dump=24ms,    load=186ms
# py3k:  data=10^5, prefetch=4096: dump=24ms,    load=36ms

# trunk: data=10^6:                dump=11662ms, load=12251ms
# py3k:  data=10^6, prefetch=1:    dump=237ms,   load=1830ms
# py3k:  data=10^6, prefetch=4096: dump=237ms,   load=215ms

# py3k:  data=10^7, prefetch=1:    dump=2654ms,  load=17003ms
# py3k:  data=10^7, prefetch=4096: dump=2654ms,  load=2451ms

# -------------nopatch---------
# version | data       | dump ms | load ms |
#  py3k   | 0,    10^6 |     230 |    1500 |
#  py3k   | 1000, 10^6 |     255 |    1780 |
#  py3k   | 0,    10^7 |    2360 |   16044 |
#  py3k   | 1000, 10^7 |    2615 |   19380 |
# -------------patch---------
# version | data       | dump ms | load ms |
#  py3k   | 0,    10^6 |     237 |     183 | x8
#  py3k   | 1000, 10^6 |     241 |     248 | x7
#  py3k   | 0,    10^7 |    2420 |    1860 | x8
#  py3k   | 1000, 10^7 |    2850 |    3100 | x6