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"""Performance of utilities"""
from time import time
import sys
import stat
from lib import (
TestBigRepoR
)
class TestUtilPerformance(TestBigRepoR):
def test_access(self):
# compare dict vs. slot access
class Slotty(object):
__slots__ = "attr"
def __init__(self):
self.attr = 1
class Dicty(object):
def __init__(self):
self.attr = 1
class BigSlotty(object):
__slots__ = ('attr', ) + tuple('abcdefghijk')
def __init__(self):
for attr in self.__slots__:
setattr(self, attr, 1)
class BigDicty(object):
def __init__(self):
for attr in BigSlotty.__slots__:
setattr(self, attr, 1)
ni = 1000000
for cls in (Slotty, Dicty, BigSlotty, BigDicty):
cli = cls()
st = time()
for i in xrange(ni):
cli.attr
# END for each access
elapsed = time() - st
print >> sys.stderr, "Accessed %s.attr %i times in %s s ( %f acc / s)" % (cls.__name__, ni, elapsed, ni / elapsed)
# END for each class type
# check num of sequence-acceses
for cls in (list, tuple):
x = 10
st = time()
s = cls(range(x))
for i in xrange(ni):
s[0]
s[1]
s[2]
# END for
elapsed = time() - st
na = ni * 3
print >> sys.stderr, "Accessed %s[x] %i times in %s s ( %f acc / s)" % (cls.__name__, na, elapsed, na / elapsed)
# END for each sequence
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