Increase Output Resolution of Python cProfile (More Resolution in Output Required)

Question

I am profiling a simple Python function such as

def prof_func():
    x = 100
    y = 100
    a = np.random.rand(x,y)
    c = signal.convolve2d(a, a, boundary='symm', mode='same')

using cProfile but the times I get out only have a resolution of three decimal places. How can I have cProfile print a greater number of decimal places so I can see how long the a = np.random.rand(x,y) line takes. Currently cProfile tells me that it takes 0.000s.

I had hoped that there would be an easy way to increase the resolution of the cProfile output but I have checked the documentation and not found one: https://docs.python.org/3/library/profile.html

score 1 · Accepted Answer · edited Jun 13 '23 at 07:19

The workaround I used to get more significant figures using cprofile and pstats. The pstats.Stats.print_stats() method uses a function called f8 (see 1), that returns the numbers with a fixed format. By defining a similar function in your script where the profiling is made, such as:

def f8_alt(x):
    return "%14.9f" % x

and monkey patching the static method

pstats.f8 = f8_alt

the print_stats() method will return the output with more decimals.

Hope it helps!

https://github.com/python/cpython/blob/main/Lib/pstats.py

Increase Output Resolution of Python cProfile (More Resolution in Output Required)

1 Answers1