Mercurial > hgrepos > Python > libs > ConfigMix

annotate tests/_perf_lookups.py @ 654:0d6673d06c2c

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Add support for using "tomllib" (in Python's stdlib since 3.11) and "tomli" TOML packages. They are preferred if they are found to be installed. But note that the declared dependency for the "toml" extra nevertheless is the "toml" package. Because it is available for all supported Python versions. So use Python 3.11+ or install "tomli" manually if you want to use the alternate packages.
author Franz Glasner <fzglas.hg@dom66.de>
date Thu, 19 May 2022 22:10:59 +0200
parents 60683361ebed
children
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60683361ebed Test-script for checking the costs of different variable lookup methods
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1 from __future__ import print_function
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2 import timeit
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3
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4 setup='''
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5 XGLOBAL= 5
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6 class A:
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7 xclass = 5
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8 def __init__(self):
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9 self.xinstance = 5
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10 def f1(self):
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11 xlocal = 5
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12 x = self.xinstance
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13 def f2(self):
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14 xlocal = 5
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15 x = A.xclass
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16 def f3(self):
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17 xlocal = 5
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18 x = XGLOBAL
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19 def f4(self):
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20 xlocal = 5
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21 x = xlocal
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22 def f5(self):
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23 xlocal = 5
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24 x = self.xclass
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25 a = A()
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26 '''
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27 num = 300000000
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28 num = 90000000
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29 print('access via instance variable: %.3f' % timeit.timeit('a.f1()', setup=setup, number=num) )
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30 print('access via class variable (via classname): %.3f' % timeit.timeit('a.f2()', setup=setup, number=num) )
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31 print('access via class variable (via self): %.3f' % timeit.timeit('a.f5()', setup=setup, number=num) )
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32 print('access via module variable: %.3f' % timeit.timeit('a.f3()', setup=setup, number=num) )
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33 print('access via local variable: %.3f' % timeit.timeit('a.f4()', setup=setup, number=num) )