#!/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