On Fri, Feb 15, 2013 at 2:36 PM, Stefan Behnel <stefan...@behnel.de> wrote:
> This is off-topic for this list, but the main problem with PyPy is that > you'll quickly hit a lot of walls when you try to use it for anything > serious in the area. It's true that there is a certain level of > interoperability with CPython extensions, but calling it a "focus area" > makes it sound bigger than it actually is in my ears. Even trying to get > bugs fixed to at least make things work at all often means running against > walls on their side. I can tell, trying to port Cython mostly consisted of > bugging PyPy developers to fix stuff, which took anything from days to > still-not-done, each time. And, by design, PyPy makes it very hard and time > consuming to debug it and to try to fix bugs in their code base. > I take issue with how you've described this, Stefan: I recall many on pypy-dev working with you quite a bit on the Cython port. There are some difficult problems involved and the port is not a main focus of the core PyPy team -- there's only so many free cycles. You should ping us (IRC is great) about any outstanding issues. > So, while I agree that PyPy is worth a try in certain application areas, > and can be helpful for some special needs, also in the field of scientific > computing, it's lightyears away from a production-ready state in that area. > It just doesn't integrate with the huge bulk of software that people use in > their daily work. And once you rely on that software, which is hand tuned, > well integrated and real-world proven in so many ways, over the time span > of way more than a decade, the most visible advantage of PyPy to make > Python code run faster becomes almost pointless. In that light, telling > people to try PyPy and to drop (most of) their current ecosystem for it > doesn't really sound helpful and clearly appears outside of the focus of > the web site in question. I disagree that it's pointless. Numba disagrees too: it also attempts to make Python code faster. PyPy is indeed a work in progress in this area, but that doesn't necessarily preclude it from being included. -- Philip Jenvey
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