Hi again, On Wed, 26 Sep 2018 at 21:19, Dimitri Vorona via pypy-dev <pypy-dev@python.org> wrote: > In my microbenchmarks its has pretty much the same call performance as when > using cffi ABI mode (dumping the functions to a shared library first) and is > around 250ns per call slower than when using API mode. > > I haven't looked at the generating assembly yet, but I guess pypy has to be > more careful, since not all information from API mode is available.
Just for completeness, the documentation of CFFI says indeed that the API mode is faster than the ABI mode. That's true mostly on CPython, where the ABI mode always requires using libffi for the calls, which is slow. On PyPy, the JIT has got enough information to do mostly the same thing in the end. (And before the JIT, PyPy uses libffi both for the ABI and the API mode for simplicity.) A bientôt, Armin. _______________________________________________ pypy-dev mailing list pypy-dev@python.org https://mail.python.org/mailman/listinfo/pypy-dev
