Silas Sewell

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.