On 1/21/21 2:42 PM, PIERRE AUGIER wrote:
----- Mail original -----
De: "Carl Friedrich Bolz-Tereick" <cfb...@gmx.de>
À: "pypy-dev" <pypy-dev@python.org>, "PIERRE AUGIER"
<pierre.aug...@univ-grenoble-alpes.fr>, "pypy-dev"
<pypy-dev@python.org>
Envoyé: Mercredi 20 Janvier 2021 12:33:43
Objet: Re: [pypy-dev] Freelist in PyPy? Reuse short lived objects?
On 15.01.21 07:44, Carl Friedrich Bolz-Tereick wrote:
This is not ready at all and I don't have enough time to work on it at
the moment, *however*: I have a small prototype (on the branch
map-improvements) that changes the instance layout in PyPy to store
type-stable instances with several fields that contain ints or floats
much more efficiently. It seems to give a 50% speedup on your micro
benchmark, so that's promising. There's still a bug somewhere and it
needs very careful investigation whether it costs too much on
non-numerical programs, but potentially this is a good improvement.
Seems to be even more like a 90% improvement on your microbench (from
13.0 to 7.0). I also fixed the bug. Some more work is needed, but it
looks relatively promising at this point.
Yes, it looks really promising! It could bring the pure Python implementation
much closer to the C and Fortran implementations used for the benchmark in the
Nature Astro paper (Zwart, 2020).
Note that I'm doing some power usage measurements with serious hardware so I'll
soon be able to reproduce and extend the figure shown here:
https://github.com/paugier/nbabel. It means that I will soon have everything to
propose a serious reply to Zwart (2020).
Cool!
To try your version, I guess I need to compile PyPy? And I also guess that it's
only for PyPy2 first?
if you tell me your platform I can ask the buildbots to make you a
binary (pypy3 works too, should not be hard to merge).
Cheers,
CF
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