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mirror of https://github.com/python/cpython.git synced 2024-12-01 11:15:56 +01:00
cpython/Tools/pybench/clockres.py
Guido van Rossum 486364b821 Merged revisions 56020-56124 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/p3yk

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  r56037 | georg.brandl | 2007-06-19 05:33:20 -0700 (Tue, 19 Jun 2007) | 2 lines

  Patch #1739659: don't slice dict.keys() in pydoc.
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  r56060 | martin.v.loewis | 2007-06-21 13:00:02 -0700 (Thu, 21 Jun 2007) | 2 lines

  Regenerate to add True, False, None.
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  r56069 | neal.norwitz | 2007-06-21 22:31:56 -0700 (Thu, 21 Jun 2007) | 1 line

  Get the doctest working again after adding None, True, and False as kewyords.
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  r56070 | neal.norwitz | 2007-06-21 23:25:33 -0700 (Thu, 21 Jun 2007) | 1 line

  Add space to error message.
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  r56071 | neal.norwitz | 2007-06-21 23:40:04 -0700 (Thu, 21 Jun 2007) | 6 lines

  Get pybench working, primarily
   * Use print function
   * Stop using string module
   * Use sorted instead of assuming dict methods return lists
   * Convert range result to a list
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  r56089 | collin.winter | 2007-06-26 10:31:48 -0700 (Tue, 26 Jun 2007) | 1 line

  Fix AttributeError in distutils/dir_util.py.
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  r56124 | guido.van.rossum | 2007-06-29 18:04:31 -0700 (Fri, 29 Jun 2007) | 30 lines

  Merged revisions 56014-56123 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

  ........
    r56019 | lars.gustaebel | 2007-06-18 04:42:11 -0700 (Mon, 18 Jun 2007) | 2 lines

    Added exclude keyword argument to the TarFile.add() method.
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    r56023 | lars.gustaebel | 2007-06-18 13:05:55 -0700 (Mon, 18 Jun 2007) | 3 lines

    Added missing \versionchanged tag for the new exclude
    parameter.
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    r56038 | georg.brandl | 2007-06-19 05:36:00 -0700 (Tue, 19 Jun 2007) | 2 lines

    Bug #1737864: allow empty message in logging format routines.
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    r56040 | georg.brandl | 2007-06-19 05:38:20 -0700 (Tue, 19 Jun 2007) | 2 lines

    Bug #1739115: make shutil.rmtree docs clear wrt. file deletion.
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    r56084 | georg.brandl | 2007-06-25 08:21:23 -0700 (Mon, 25 Jun 2007) | 2 lines

    Bug #1742901: document None behavior of shlex.split.
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    r56091 | georg.brandl | 2007-06-27 07:09:56 -0700 (Wed, 27 Jun 2007) | 2 lines

    Fix a variable name in winreg docs.
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2007-06-30 05:01:58 +00:00

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Python

#!/usr/bin/env python
""" clockres - calculates the resolution in seconds of a given timer.
Copyright (c) 2006, Marc-Andre Lemburg (mal@egenix.com). See the
documentation for further information on copyrights, or contact
the author. All Rights Reserved.
"""
import time
TEST_TIME = 1.0
def clockres(timer):
d = {}
wallclock = time.time
start = wallclock()
stop = wallclock() + TEST_TIME
spin_loops = range(1000)
while 1:
now = wallclock()
if now >= stop:
break
for i in spin_loops:
d[timer()] = 1
values = d.keys()
values.sort()
min_diff = TEST_TIME
for i in range(len(values) - 1):
diff = values[i+1] - values[i]
if diff < min_diff:
min_diff = diff
return min_diff
if __name__ == '__main__':
print('Clock resolution of various timer implementations:')
print('time.clock: %10.3fus' % (clockres(time.clock) * 1e6))
print('time.time: %10.3fus' % (clockres(time.time) * 1e6))
try:
import systimes
print('systimes.processtime: %10.3fus' % (clockres(systimes.processtime) * 1e6))
except ImportError:
pass