Mark E. Fenner wrote:
>
> and the copy is taking the majority (42%) of my execution time.
> So, I'd like to speed up my copy. I had an explicit copy method that did
> what was needed and returned a new object, but this was quite a bit slower
> than using the standard lib copy.copy().
>
How are you measuring? It seems to me that your Rule.copy method is a lot
faster
than copy.copy:
>>> r= Rule(range(100))
>>> shell.timefunc(r.copy)
'copy(...) 36458 iterations, 13.71usec per call'
>>> from copy import copy
>>> shell.timefunc(copy, r)
'copy(...) 4498 iterations, 111.17usec per call'
>>>
where shell.timefunc is:
def _get_timer():
if sys.platform == "win32":
return time.clock
else:
return time.time
return
def timefunc(func, *args, **kwds):
timer = _get_timer()
count, totaltime = 0, 0
while totaltime < 0.5:
t1 = timer()
res = func(*args, **kwds)
t2 = timer()
totaltime += (t2-t1)
count += 1
if count > 1000:
unit = "usec"
timeper = totaltime * 1000000 / count
else:
unit = "msec"
timeper = totaltime * 1000 / count
return "%s(...) %s iterations, %.2f%s per call" % \
(func.__name__, count, timeper, unit)
Michael
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