More difference between range@py3 and xrange@py2 about python_reference HOT 3 CLOSED

x = 10000000
val = x/2

def val_in_xrange(x, val):
    if val in xrange(x):
        pass

def val_in_range(x, val):
    if val in range(x):
        pass

def val_in_range_workaround(x, val):
    if 0 <= val <= x-1:
        pass

print 'Python', python_version()
%timeit val_in_xrange(x, val) # since not supported in Py 3.x
%timeit val_in_range(x, val)
%timeit val_in_range_workaround(x, val)

Python 2.7.7
10 loops, best of 3: 181 ms per loop
1 loops, best of 3: 557 ms per loop
1000000 loops, best of 3: 420 ns per loop

print('Python', python_version())
# %timeit val_in_xrange(x, val) # since not supported in Py 3.x
%timeit val_in_range(x, val)
%timeit val_in_range_workaround(x, val)

Python 3.4.1
1 loops, best of 3: 740 ms per loop
1000000 loops, best of 3: 545 ns per loop

i = 100000000
%timeit i/2 in range(i)
1 loops, best of 3: 5.64 s per loop
%timeit i//2 in range(i)
1000000 loops, best of 3: 765 ns per loop