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Re: Calling a function is faster than not calling it?

References <554f2bb6$0$13011$c3e8da3$5496439d@news.astraweb.com> <mailman.304.1431254634.12865.python-list@python.org> <554f700f$0$13011$c3e8da3$5496439d@news.astraweb.com> <mio04q$6gk$1@ger.gmane.org>
From Ian Kelly <ian.g.kelly@gmail.com>
Date 2015-05-10 10:25 -0600
Subject Re: Calling a function is faster than not calling it?
Newsgroups comp.lang.python
Message-ID <mailman.315.1431275173.12865.python-list@python.org> (permalink)

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On Sun, May 10, 2015 at 10:14 AM, Peter Otten <__peter__@web.de> wrote:
> When there was an actual speed-up I also had a look at
> PyEval_GetGlobals/Locals() which in turn call
>
> PyEval_GetFrame()
>
> and
>
> PyEvalPyFrame_FastToLocalsWithError()
>
> whatever these do. (The first function reminded me of sys._getframe() hence
> the mention of stack inspection)

Based on the names, I surmise that the first one gets the top stack
frame object, and that the second one extracts the "fast" local
variables from the frame object and builds a dict of them for use by
eval.

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Calling a function is faster than not calling it? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-05-10 19:58 +1000
  Re: Calling a function is faster than not calling it? Christian Gollwitzer <auriocus@gmx.de> - 2015-05-10 12:34 +0200
    Re: Calling a function is faster than not calling it? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-05-11 01:04 +1000
  Re: Calling a function is faster than not calling it? Peter Otten <__peter__@web.de> - 2015-05-10 12:43 +0200
    Re: Calling a function is faster than not calling it? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-05-11 00:49 +1000
      Re: Calling a function is faster than not calling it? Peter Otten <__peter__@web.de> - 2015-05-10 18:14 +0200
      Re: Calling a function is faster than not calling it? Ian Kelly <ian.g.kelly@gmail.com> - 2015-05-10 10:25 -0600
  Re: Calling a function is faster than not calling it? Terry Reedy <tjreedy@udel.edu> - 2015-05-10 12:37 -0400
  Re: Calling a function is faster than not calling it? BartC <bc@freeuk.com> - 2015-05-10 22:08 +0100
    Re: Calling a function is faster than not calling it? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-05-11 13:58 +1000
      Re: Calling a function is faster than not calling it? BartC <bc@freeuk.com> - 2015-05-11 10:50 +0100
        Re: Calling a function is faster than not calling it? Skip Montanaro <skip.montanaro@gmail.com> - 2015-05-11 09:12 -0500
          Re: Calling a function is faster than not calling it? BartC <bc@freeuk.com> - 2015-05-11 16:01 +0100
            Re: Calling a function is faster than not calling it? Skip Montanaro <skip.montanaro@gmail.com> - 2015-05-11 10:13 -0500
      Re: Calling a function is faster than not calling it? Tony the Tiger <tony@tiger.invalid> - 2015-05-15 01:35 +0000
  Re: Calling a function is faster than not calling it? Stefan Behnel <stefan_ml@behnel.de> - 2015-05-11 08:11 +0200
  Re: Calling a function is faster than not calling it? Piet van Oostrum <piet@vanoostrum.org> - 2015-06-22 23:49 +0200

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