from timeit import timeit
from itertools import chain, filterfalse
import functools
 
m = ((2,0,2,2),(4,4,5,4),(0,9,4,8),(2,2,0,0))
 
def zeroCountOP():
    return [item for row in m for item in row].count(0)
 
def zeroCountTFE():
    return len([item for row in m for item in row if item == 0])
 
def zeroCountJFS():
    return sum(row.count(0) for row in m)
 
def zeroCount():
    total = 0
    for x in filterfalse(bool, chain(*m)): 
        total += 1
    return total
def zeroCountuser2931409():
    # `reduce` is in `functools` in Py3k
    return functools.reduce(lambda a, b: a + b, m).count(0)
 
print('Original code     ', timeit(zeroCountOP, number=100000))
print('@J.F.Sebastian    ', timeit(zeroCountJFS, number=100000))
print('@thefourtheye     ', timeit(zeroCountTFE, number=100000))
print('@user2931409      ', timeit(zeroCountuser2931409, number=100000))
print('@frostnational    ', timeit(zeroCount, number=100000))

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