Mercurial > cpython-lru_cache-weakref

annotate Tools/pybench/clockres.py @ 78069:a8aa77458e12 3.2

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Add c_size_t and c_ssize_t to the ctypes summary table.
author Antoine Pitrou <solipsis@pitrou.net>
date Thu, 12 Jul 2012 20:31:50 +0200
parents 63741c7521aa
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/env python
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2
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3 """ clockres - calculates the resolution in seconds of a given timer.
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4
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5 Copyright (c) 2006, Marc-Andre Lemburg (mal@egenix.com). See the
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6 documentation for further information on copyrights, or contact
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7 the author. All Rights Reserved.
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8
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9 """
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10 import time
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11
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12 TEST_TIME = 1.0
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13
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14 def clockres(timer):
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15 d = {}
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16 wallclock = time.time
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17 start = wallclock()
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18 stop = wallclock() + TEST_TIME
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19 spin_loops = range(1000)
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20 while 1:
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21 now = wallclock()
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22 if now >= stop:
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23 break
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24 for i in spin_loops:
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25 d[timer()] = 1
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63741c7521aa More 2to3 fixes in the Tools directory. Fixes #2893.
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26 values = sorted(d.keys())
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27 min_diff = TEST_TIME
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28 for i in range(len(values) - 1):
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29 diff = values[i+1] - values[i]
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30 if diff < min_diff:
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31 min_diff = diff
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32 return min_diff
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33
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34 if __name__ == '__main__':
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35 print('Clock resolution of various timer implementations:')
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36 print('time.clock: %10.3fus' % (clockres(time.clock) * 1e6))
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37 print('time.time: %10.3fus' % (clockres(time.time) * 1e6))
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38 try:
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39 import systimes
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40 print('systimes.processtime: %10.3fus' % (clockres(systimes.processtime) * 1e6))
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41 except ImportError:
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42 pass