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Re: Speeding up Python's exit

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From Devin Jeanpierre <jeanpierreda@gmail.com>
Date Thu, 28 Feb 2013 12:33:02 -0500
Subject Re: Speeding up Python's exit
To Chris Angelico <rosuav@gmail.com>
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On Thu, Feb 28, 2013 at 12:31 PM, Devin Jeanpierre
<jeanpierreda@gmail.com> wrote:
> On Thu, Feb 28, 2013 at 12:06 PM, Chris Angelico <rosuav@gmail.com> wrote:
>> Is it any different if you create a deliberate reference loop and then
>> stuff it into some module somewhere? That would force it to be kept
>> until interpreter shutdown, and then a cyclic garbage collection after
>> that, which quite probably would be never run. A stupid trick,
>> perhaps, but it might work; I tested it with a dummy class with a
>> __del__ method and it wasn't called. Putting it into some other module
>> may not be necessary, but I don't know what happens with the
>> interactive interpreter and what gets freed up when.
>
> __del__ is never called for cyclic references.

Sorry, I posted too early. Not only is __del__ never called, but
__del__ is the reason the cycles aren't collected. I don't know if
your trick will work without __del__.

-- Devin

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Thread

Speeding up Python's exit Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-02-28 16:49 +0000
  Re: Speeding up Python's exit Neil Cerutti <neilc@norwich.edu> - 2013-02-28 17:02 +0000
  Re: Speeding up Python's exit Chris Angelico <rosuav@gmail.com> - 2013-03-01 04:06 +1100
  Re: Speeding up Python's exit Chris Angelico <rosuav@gmail.com> - 2013-03-01 04:33 +1100
  Re: Speeding up Python's exit Devin Jeanpierre <jeanpierreda@gmail.com> - 2013-02-28 12:33 -0500
  Re: Speeding up Python's exit Devin Jeanpierre <jeanpierreda@gmail.com> - 2013-02-28 12:31 -0500
  Re: Speeding up Python's exit Grant Edwards <invalid@invalid.invalid> - 2013-03-01 01:17 +0000
    Re: Speeding up Python's exit Antoine Pitrou <solipsis@pitrou.net> - 2013-03-01 19:10 +0000
    Re: Speeding up Python's exit Dave Angel <davea@davea.name> - 2013-03-01 14:17 -0500
    Re: Speeding up Python's exit Antoine Pitrou <solipsis@pitrou.net> - 2013-03-01 22:51 +0000
      Re: Speeding up Python's exit Ross Ridge <rridge@csclub.uwaterloo.ca> - 2013-03-03 18:27 -0500
    Re: Speeding up Python's exit Jason Swails <jason.swails@gmail.com> - 2013-03-01 21:51 -0500
  Re: Speeding up Python's exit Antoine Pitrou <solipsis@pitrou.net> - 2013-03-01 14:59 +0000

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