[Python-Dev] Request review of cProfile/profile series issue

Nick Coghlan ncoghlan at gmail.com
Mon Apr 24 00:12:00 EDT 2017

On 23 April 2017 at 13:21, Louie Lu <me at louie.lu> wrote:
> Hi all,
> I'm now looking for cProfile/profile lib's issue, and have solve a series of
> dependent problem, here is the list:
> #9285 - Add a profile decorator to profile and cProfile
> #30113 - Allow helper functions to wrap sys.setprofile
> #18971 - Use argparse in the profile/cProfile modules
> #30118 - Add unittest for cProfile/profile command line interface
> It can divide into two categories, first is the context manager problem, and
> the second is optparse to argparse problem.
> 1. context manager problem:
> Relative issue: #9285, #30113
> Relative PR: #287, #1212, #1253
> This is an issue since 2010, and stop at profile can't simply add a
> __enter__ and __exit__ to make it a context manager. The main problem is,
> sys.setprofile() will hit the return and get bad return in profile
> dispatch_return function. The solution is to insert a simulate call in the
> helper function, to provide the context between helper frame and where the
> profile is defined.

I'd like to second Louie's call for additional review here. I've been
reviewing them so far, and they look sensible to me, but I don't
personally know the profile code base at all, so there's a strong
chance I'll miss subtle details.


Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia

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