How to get the time in ms between two calls in Python Question: How does one properly get the number of millis between two successive calls? There’s a bunch of different ways to get or profile time, and all of them seem to have problems: time.clock() is deprecated time.time() is based on the system’s clock …
Timing operation with increasing list size – unexpected behaviour Question: Problem: How long does it take to generate a Python list of prime numbers from 1 to N? Plot a graph of time taken against N. I used SymPy to generate the list of primes. I expected the time to increase monotonically. But why is …
How can I get millisecond and microsecond-resolution timestamps in Python? Question: How do I get millisecond and microsecond-resolution timestamps in Python? I’d also like the Arduino-like delay() (which delays in milliseconds) and delayMicroseconds() functions. I read other answers before asking this question, but they rely on the time module, which prior to Python 3.3 did …
How to run Python script only during certain hours of the day? Question: I’ve got a script that I need to run between 7am and 9pm. The script already runs indefinitely but if I am able to maybe pause it outside the above hours then that’d minimize the amount of data it would produce. I …
What exactly are fractional seconds returned by Python time.perf_counter()? Question: This is probably a dumb/obvious question, but just want to make sure my hunches are correct. I’m doing some basic performance timing in a Python3 script using time.perf_counter() like so: start = time.perf_counter() # some time consuming operation here end = time.perf_counter() elapsed = end …
Python class @property: use setter but evade getter? Question: In python classes, the @property is a nice decorator that avoids using explicit setter and getter functions. However, it comes at a cost of an overhead 2-5 times that of a “classical” class function. In my case, this is quite OK in the case of setting …
What is the Python equivalent of Matlab's tic and toc functions? Question: What is the Python equivalent of Matlab’s tic and toc functions? Asked By: Alex || Source Answers: Have a look at the timeit module. It’s not really equivalent but if the code you want to time is inside a function you can easily …
Schedule a repeating event in Python 3 Question: I’m trying to schedule a repeating event to run every minute in Python 3. I’ve seen class sched.scheduler but I’m wondering if there’s another way to do it. I’ve heard mentions I could use multiple threads for this, which I wouldn’t mind doing. I’m basically requesting some …
timeit versus timing decorator Question: I’m trying to time some code. First I used a timing decorator: #!/usr/bin/env python import time from itertools import izip from random import shuffle def timing_val(func): def wrapper(*arg, **kw): ”’source: http://www.daniweb.com/code/snippet368.html”’ t1 = time.time() res = func(*arg, **kw) t2 = time.time() return (t2 – t1), res, func.__name__ return wrapper @timing_val …
