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[Python-Dev] "Global freepool"

Victor Stinner victor.stinner at gmail.com
Thu Jun 1 05:20:05 EDT 2017 
2017-06-01 10:40 GMT+02:00 Antoine Pitrou <solipsis at pitrou.net>:
> This is already exactly how PyObject_Malloc() works. (...)

Oh ok, good to know...

> IMHO the main thing the
> private freelists have is that they're *private* precisely, so they can
> avoid a couple of conditional branches.

I would like to understand how private free lists are "so much"
faster. In fact, I don't recall if someone *measured* the performance
speedup of these free lists :-)

By the way, the Linux kernel uses a "SLAB" allocator for the most
common object types like inode. I'm curious to know if CPython would
benefit of a similar allocator for our most common object types? For
example types which already use a free list.

https://en.wikipedia.org/wiki/Slab_allocation

Victor
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