Silas Sewell - line_profiler http://www.silassewell.com/blog/tag/line_profiler Infrastructure Development Sat, 08 Jan 2011 00:00:00 GMT http://www.silassewell.com/ en hourly 1 Python Line-by-line Profiler (line_profiler and kernprof) http://www.silassewell.com/blog/2009/05/28/python-line-by-line-profiler-line_profiler-and-kernprof/ Thu, 28 May 2009 00:00:00 GMT silas http://www.silassewell.com/blog/2009/05/28/python-line-by-line-profiler-line_profiler-and-kernprof/ The following is a quick and dirty guide to getting started with line_profiler, a Python line-by-line profiler, on Fedora.

  1. Build and install the python-line_profiler package

  2. Create a file called test.py with the code below

    import random, time

def sleep():
    seconds = random.randint(0, 5)
    print 'Sleeping %s seconds' % seconds
    time.sleep(seconds)

@profile
def test():
    sleep()
    sleep()
    sleep()

test()

  3. Profile test.py

    [silas@silas ~]$ kernprof.py -l test.py
Sleeping 4 seconds
Sleeping 5 seconds
Sleeping 2 seconds
Wrote profile results to test.py.lprof

  4. View the results

    [silas@silas ~]$ python -m line_profiler test.py.lprof
Timer unit: 1e-06 s

File: test.py
Function: test at line 8
Total time: 10.9994 s

Line #      Hits         Time  Per Hit   % Time  Line Contents
==============================================================
     8                                           @profile
     9                                           def test():
    10         1      3999416 3999416.0     36.4      sleep()
    11         1      4999982 4999982.0     45.5      sleep()
    12         1      1999990 1999990.0     18.2      sleep()

NOTE: I have a package review up for line_profiler and it should be available via yum eventually.

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