gistfile1.py

spoof@spoofs-mac:tests% python test_filter.py
list comprehension  0.0898420810699
filter lambda  0.104062080383
filter None 2.14576721191e-06
--------------------
def list_comprehension(data):
    return [x for x in data if x]

 17           0 BUILD_LIST               0
              3 LOAD_FAST                0 (data)
              6 GET_ITER            
        >>    7 FOR_ITER                18 (to 28)
             10 STORE_FAST               1 (x)
             13 LOAD_FAST                1 (x)
             16 POP_JUMP_IF_FALSE        7
             19 LOAD_FAST                1 (x)
             22 LIST_APPEND              2
             25 JUMP_ABSOLUTE            7
        >>   28 RETURN_VALUE        
None
--------------------
def lambda_filter(data):
    _f = lambda x: x
    return filter(_f, data)

 21           0 LOAD_CONST               1 (<code object <lambda> at 0x104c29d30, file "test_filter.py", line 21>)
              3 MAKE_FUNCTION            0
              6 STORE_FAST               1 (_f)

 22           9 LOAD_GLOBAL              0 (filter)
             12 LOAD_FAST                1 (_f)
             15 LOAD_FAST                0 (data)
             18 CALL_FUNCTION            2
             21 RETURN_VALUE        
None
--------------------
def lambda_none_filter(data):
    return filter(None, data)

 26           0 LOAD_GLOBAL              0 (filter)
              3 LOAD_CONST               0 (None)
              6 LOAD_FAST                0 (data)
              9 CALL_FUNCTION            2
             12 RETURN_VALUE        
None