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Thu May 23 14:49:43 EDT 2019 · https://mail.python.org/pipermail/python-dev/2019-May/157665.html

I suggest filing a bug to track this...

On Thu, May 23, 2019 at 10:13 AM Tim Peters <tim.peters at gmail.com> wrote:

> [Inada Naoki <songofacandy at gmail.com>]
> > ...
> > 2. This loop is cleary hot:
> >
> https://github.com/python/cpython/blob/51aa35e9e17eef60d04add9619fe2a7eb938358c/Objects/obmalloc.c#L1816-L1819
>
> Which is 3 lines of code plus a closing brace.  The OP didn't build
> their own Python, and the source from which it was compiled wasn't
> available to them.  But they did say that when they got into gdb and
> single-stepped, it was looping through the same three lines of code,
> in obmalloc.c, over & over.  Which is 100% consistent with the loop
> you identified as being "the hot spot".
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Showing content from https://mail.python.org/pipermail/python-dev/2019-May/157665.html below:

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