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# timed.py
import sys, time
class Timed(object):
"""Decorator factory: each decorator object wraps a function and
executes it many times (default 100 times).
The average time spent in one iteration, expressed in milliseconds,
is stored in the attributes wrappedfunc.time and wrappedfunc.clocktime,
and displayed into a log file which defaults to stdout.
"""
def __init__(self, repeat=100, logfile=sys.stdout):
self.repeat = repeat
self.logfile = logfile
def __call__(self, func):
def wrappedfunc(*args, **kw):
fullname = "%s.%s ..." % (func.__module__, func.func_name)
print >> self.logfile, 'Executing %s' % fullname.ljust(30),
time1 = time.time()
clocktime1 = time.clock()
for i in xrange(self.repeat):
res = func(*args,**kw) # executes func self.repeat times
time2 = time.time()
clocktime2 = time.clock()
wrappedfunc.time = 1000*(time2-time1)/self.repeat
wrappedfunc.clocktime = 1000*(clocktime2 - clocktime1)/self.repeat
print >> self.logfile, \
'Real time: %s ms;' % self.rounding(wrappedfunc.time),
print >> self.logfile, \
'Clock time: %s ms' % self.rounding(wrappedfunc.clocktime)
return res
wrappedfunc.func_name = func.func_name
wrappedfunc.__module__ = func.__module__
return wrappedfunc
@staticmethod
def rounding(float_):
"Three digits rounding for small numbers, 1 digit rounding otherwise."
if float_ < 10.:
return "%5.3f" % float_
else:
return "%5.1f" % float_
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