Hi Armin,
On 2018年8月10日 19:15:11 +0200 Armin Rigo <[email protected]> wrote: > Currently, the C API only allows Psyco-style JITting (much slower than > PyPy). All three other points might not be possible at all without a > seriously modified C API. Why? I have no proof, but only > circumstantial evidence. Each of (2), (3), (4) has been done in at > least one other implementation: PyPy, Jython and IronPython. Each of > these implementation has also got its share of troubles with emulating > the CPython C API. You can continue to think that the C API has got > nothing to do with it. I tend to think the opposite. The continued > absence of major performance improvements for either CPython itself or > for any alternative Python implementation that *does* support the C > API natively is probably proof enough---I think that enough time has > passed, by now, to make this argument. Jython and IronPython never got significant manpower AFAIK, so even without being hindered by the C API, chances are they would never have gotten very far. Both do not even seem to have stable releases implementing the Python 3 language... That leaves us with CPython and PyPy, which are only two data points. And there are enough differences, AFAIK, between those two that picking up "supports the C API natively" as the primary factor leading to a performance difference sounds arbitrary. (the major difference being IMHO that PyPy is written in RPython, which opens up possibilities that are not realistic with a C implementation, such as the JIT being automatically able to inspect implementations of core / stdlib primitives; in a CPython-based JIT such as Numba, you have to reimplement all those primitives in a form that's friendly to the JIT compiler) Regards Antoine. _______________________________________________ Python-Dev mailing list [email protected] https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com