Asked By – BuddyJoe
What is the proper way to compare 2 times in Python in order to speed test a section of code? I tried reading the API docs. I’m not sure I understand the timedelta thing.
So far I have this code:
from datetime import datetime tstart = datetime.now() print t1 # code to speed test tend = datetime.now() print t2 # what am I missing? # I'd like to print the time diff here
Now we will see solution for issue: Python speed testing – Time Difference – milliseconds
datetime.timedelta is just the difference between two datetimes … so it’s like a period of time, in days / seconds / microseconds
>>> import datetime >>> a = datetime.datetime.now() >>> b = datetime.datetime.now() >>> c = b - a >>> c datetime.timedelta(0, 4, 316543) >>> c.days 0 >>> c.seconds 4 >>> c.microseconds 316543
Be aware that
c.microseconds only returns the microseconds portion of the timedelta! For timing purposes always use
You can do all sorts of maths with datetime.timedelta, eg:
>>> c / 10 datetime.timedelta(0, 0, 431654)
It might be more useful to look at CPU time instead of wallclock time though … that’s operating system dependant though … under Unix-like systems, check out the ‘time’ command.
This question is answered By – NickZoic
This answer is collected from stackoverflow and reviewed by FixPython community admins, is licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0