Check running time per line in python

Question

I've written a Python script, but running it is taking a lot longer than I had anticipated, and I've no obvious candidate for particuklar lines in the script taking up runtime.

Is there anything I can put in my code to check how long its taking to run through each line?

Many thanks.

Have you tried [*this method*](http://stackoverflow.com/a/4299378/23771)? — Mike Dunlavey, Jun 26 '13 at 12:11

score 6 · Accepted Answer · edited May 23 '17 at 12:08

6

Have you tried running python with profiling?

python -m cProfile --sort cumulative your_single_thread_script.py &> out.log

You can find more details in this question How can you profile a python script?

You can read more about the profiling utility here.

edited May 23 '17 at 12:08

Community

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answered Jun 26 '13 at 07:49

Shai

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what about if I had one script calling a bunch of others, how could I check the time for each individual script? – user124123 Jun 26 '13 at 08:56

score 4 · Answer 2 · answered Jun 26 '13 at 07:53

Use a profiler such as hotshot. It's easy!

1) run your code with the profiles:

import hotshot

prof = hotshot.Profile("hotshot_stats.prof")
prof.runcall(my_function)
prof.close()

2) Read the resulting file:

from hotshot import stats

s = stats.load("hotshot_stats.prof")
s.strip_dirs()
s.sort_stats('time', 'calls')
s.print_stats(20)

score 3 · Answer 3 · edited Jun 26 '13 at 07:51

3

timeit is a standard module since python 2.3 take a look at the documentation for it.

edited Jun 26 '13 at 07:51

Shai

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answered Jun 26 '13 at 07:49

Steve Barnes

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Check running time per line in python

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