LWN: Comments on "Cython 3.0 released"

Cython 3.0 released

mb — Wed, 19 Jul 2023 18:25:49 +0000

> throw in some annotations here and there

Yep. And that can be done incrementally. Starting with no annotations at all, which will already get you a couple of percent of performance gain, because the interpreter is not involved in executing these compiled modules anymore.

Cython 3.0 released

NYKevin — Wed, 19 Jul 2023 16:52:13 +0000

Having played with it myself, the main benefit, IMHO, is just how easily it integrates into an existing Python project. I mean, sure, your build process gets a great deal more complicated, and for some that's a dealbreaker in its own right, but if you're willing to put up with that, you can literally just write Python code, throw in some annotations here and there, it magically speeds up by quite a long way, *and* it's still 100% callable from the Python side of the fence. If you've already got something 90% of the way to working in NumPy, but you just have this one place where you'd really like to write your own element-by-element loop, without killing the performance, and without having to fiddle with broadcasting etc., Cython lets you do that.

Cython 3.0 released

rsidd — Wed, 19 Jul 2023 08:38:25 +0000

I have used cython some years ago. It worked as advertised, but just felt too fiddly. I have since switched to julia, and don't see myself trying cython again.

Cython 3.0 released

ccchips — Wed, 19 Jul 2023 02:39:32 +0000

Sounds dangerous. If I ever get back to work (I'm in my 70s,) I hope I don't wind up with a "boss" who wants me to use this thing.

Cython 3.0 released

Cyberax — Wed, 19 Jul 2023 02:27:44 +0000

Aaaaaand everything broke down.

I've just spent several hours wrangling dependencies of awscli and other dependencies.