Python code coverage for Tools/pybench/clockres.py

#	count	content
1	n/a	#!/usr/bin/env python
2	n/a
3	n/a	""" clockres - calculates the resolution in seconds of a given timer.
4	n/a
5	n/a	Copyright (c) 2006, Marc-Andre Lemburg (mal@egenix.com). See the
6	n/a	documentation for further information on copyrights, or contact
7	n/a	the author. All Rights Reserved.
8	n/a
9	n/a	"""
10	n/a	import time
11	n/a
12	n/a	TEST_TIME = 1.0
13	n/a
14	n/a	def clockres(timer):
15	n/a	d = {}
16	n/a	wallclock = time.time
17	n/a	start = wallclock()
18	n/a	stop = wallclock() + TEST_TIME
19	n/a	spin_loops = range(1000)
20	n/a	while 1:
21	n/a	now = wallclock()
22	n/a	if now >= stop:
23	n/a	break
24	n/a	for i in spin_loops:
25	n/a	d[timer()] = 1
26	n/a	values = sorted(d.keys())
27	n/a	min_diff = TEST_TIME
28	n/a	for i in range(len(values) - 1):
29	n/a	diff = values[i+1] - values[i]
30	n/a	if diff < min_diff:
31	n/a	min_diff = diff
32	n/a	return min_diff
33	n/a
34	n/a	if __name__ == '__main__':
35	n/a	print('Clock resolution of various timer implementations:')
36	n/a	print('time.clock: %10.3fus' % (clockres(time.clock) * 1e6))
37	n/a	print('time.time: %10.3fus' % (clockres(time.time) * 1e6))
38	n/a	try:
39	n/a	import systimes
40	n/a	print('systimes.processtime: %10.3fus' % (clockres(systimes.processtime) * 1e6))
41	n/a	except ImportError:
42	n/a	pass