[Python-Dev] Have a big machine and spare time? Here's a possible Python bug.

[Brett Cannon]

On Fri, May 31, 2019 at 11:12 AM Tim Peters <tim.peters at gmail.com> wrote:

> [Tim]
> >> I'm keen to get feedback on this before merging the PR, because this
> >> case is so very much larger than anything I've ever tried that I'm
> >> wary that there may be more than one "surprise" lurking here. ...
>
> [Inada Naoki <songofacandy at gmail.com>]
> > I started r5a.4xlarge EC2 instance and started arena.py.
> > I will post the result in next 12 hours.
>
> Thank you!  Wrapping this up, Inada attached the results to the bug
> report.  For the OP's original big case, the time to reclaim the tree
> storage dropped from nearly 5 hours to about 70 seconds.  The time to
> build the tree didn't materially change (it was a bit faster after the
> patch, but offhand didn't look significantly faster to me).
>
> Since I called this a "design flaw" rather than "a bug", I'm not
> inclined to backport it.  If someone else thinks it should be, that's
> up to them.  I'm _assuming_ Github won't decide to backport it on its
> own - but maybe I'm wrong (Github workflow is still pretty magical to
> me).
>

Backports only happen if you add the appropriate labels to the PR itself
(and if that wasn't clear from the devguide then please open an issue so we
can fix that oversight).
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