mirror of
https://github.com/python/cpython.git
synced 2024-12-01 03:01:36 +01:00
43 lines
1.2 KiB
Python
43 lines
1.2 KiB
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 = 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
|