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