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#!/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 = sorted(d.keys())
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