I mainly used two ways to measure code execution time between Python scripts or parts of them.

Command line:
python3 -m timeit -n 1 -r 1 -p -u sec "import os; os.system('python3 myprogram.py')"

-m timeit invoke timeit module
-n 1 times you wan to execute the "statement" (== your 'python "program"/script/foo.py')
-r 1 times to repeat the timer (default 5)
-p measure process time, not wallclock time, using internally time.process_time() instead of time.perf_counter(), which is the default. Very handy if your program prompts the user for input at any step, not to count, for example, the time delay introducing input.
-u sec specify a time unit for timer output; can select nsec, usec, msec, or sec

Embedded in code:
time Python module.
As @Jeyekomon comments below the OP, time module is a very flexible, useful, fast and simple alternative putting measurement points wherever you want. Found here How do I get time of a Python program's execution:
import time << put this at the beginning of your code
start_time = time.time() << put this in the place you want to start measuring time. Just a snapshot of instant time.
print("--- %s seconds ---" % (time.time() - start_time)) << put this in the place you want to stop (and print) elapsed time. Just another snapshot of instant time and the subtraction respect to the previous.

Operating system alternative:
time operating system command. Present in Windows or Linux/UNIX. But check-out for implementation particular options and flags (man time).

Joint example using timeit (command-line) and time (Python module functions placed inside my code):
python3 -m timeit -n 1 -r 1 -p -u sec "import os; os.system('python3 myprogram.py')"
Tell me what term of the sequence you want to calculate: 3 (belongs to program prompt)
--- 1.0251998901367188e-05 seconds --- << output from embedded code (time functions)
2 (belongs to program output)
1 loop, best of 1: 0.000448 sec per loop << (shell) output from timeit