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Profiling in python
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Profiling in python

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  • 1. PROFILING IN PYTHON John Saturday, December 21, 2013
  • 2. introduction to the profiler • A profiler is a program descibes the run time performance of a program. • Python standard library provide 3 difference profiler: – cProfile : is recommende for most users. – profile: a pure python module whose interface imitated by cProfile – hotshot: an experimental C module that focused on minimizing the overhead of profiling
  • 3. Quick example Profile an application 1. use command line: $ python -m cProfile myscript.py 2. or add into code with main function: impor cProfile cProfile.run(‘main()’) The result looks like:
  • 4. Cython profiling basic Enable it for source file • profiling can be enabled by adding at the top of file #cython: profile=True • Use a special decorator disable profiling for one function only: cimport cython @cython.profile(False) def my_func(): pass Use pstats module review the profile import pstats p = pstats.Stats(‘fooprof’) p.strip_dirs().sort_stats(‘time’) .print_stats()
  • 5. Reference • http://docs.python.org/2/library/profile.html
  • 6. Reference • http://docs.python.org/2/library/profile.html