[pypy-dev] Microsoft is starting its own JIT for Python.

[Nathaniel Smith]

It's not "Microsoft", it's an experimental side project of two people who
happen to work at Microsoft. As I understand it, the core motivation is to
explore how far they can get in dragging upstream CPython in a JITwards
direction -- so it's written as a extension module for CPython, and it
requires a very recent version of CPython (no support for python 2!).

The advantage is that it's *extremely* compatible with CPython -- unlike
pypy, it handles the latest version of the language, it has the same
garbage collection rules, and not only do they get essentially perfect
extension module compatibility, they get it with zero speed penalty. They
can also potentially explore different compilation strategies (e.g.
function at a time) that aren't as easy a fit to pypy's meta-tracing
architecture, and can use it as a lever to push CPython to start adding
features like dict versioning.

The disadvantage versus PyPy obviously is that it's nowhere near as mature,
there are reasons to doubt that their optimization strategy could ever be
competitive with PyPy's given the need for CPython compatibility, and PyPy
could conceivably catch up on the relevant axes (better faster cpyext,
python 3 support, etc.) -- though this isn't a given either. Right now I
think it makes more sense to think of it as an interesting experiment to
watch than as a serious product that one hopes to use.

In any case, one can't really get mad at some individuals for investing
their spare time in the wrong thing. This is definitely not some strategic
initiative from Microsoft-the-company.

-n

On Jul 21, 2016 3:16 PM, "Phyo Arkar" <phyo.arkarlwin at gmail.com> wrote:

Hello PyPy Team;

I guess you guys already known.
Microsft is starting its own pypy : https://github.com/Microsoft/Pyjion

The main reason they mention there is due to weak CPyext support but It is
just duplicating work, as you guys are already working on it .

Shouldn't microsoft contribute into CPyext work in pypy instead?

Regards,

Phyo.

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