[oakridge]

I'm not sure how different this is with Cython since you can also write C/C++ code with it, and hence use any C/C++ libraries. I say that the benefit offered by the example is more of bringing the Rust ecosystem to Python than solving performance issues.

[sametmax]

Well, with cython, either you write python compiled to C, and you won't match rust perf nor types, or you write c/c++ and bind it to python, and you won't match rust safetiness.

[rjeli]

why would rust have better performance than cython? cython is as fast as C

[coldtea]

Cython just transpiles to C. It's not "as fast as C", it's as fast as the runtime support structures it uses, and the communication with Python allows.

[ogrisel]

You can write very efficient Cython code but it's true that in this case, you tend to adopt a lower level code style that is very close to C/C++. Basically, you need to think about the C/C++ code that will be generated by Cython.

C/C++ compilers might be able to generate more optimized native code than what rutsc does though. Actually, this is a question: how good is rustc with numerical / math intensive code? For instance, does it implements loop unrolling and SIMD vectorization?

[heavenlyblue]

Most of the time when a developer needs loop unrolling - numpy will work best anyway. Why does everyone always start mentioning this fact when performance is mentioned?

For example, in my case I always need high-performance code to work with strings loaded from loads of CSV files. That includes: merging strings, matching them, comparing them. Loop unrolling/SIMD would not really help here, while an ability to write safe, checked code fast - would.

On the other hand I do need the pythonic dynamics, so that's what I stick to.

[rjeli]

yes, exactly as I said.

[toyg]

Total layman here, but I thought one would use Rust because it’s easier to write “safe” code with it than C/C++, while maintaining an equivalent low-level speed advantage.

[baq]

you should also quote "easier" ;)

it's certainly easier once you sacrifice a goat to the compiler to stop insulting you and your mother.

disclaimer: i love rust

[sametmax]

Well it's better than your client insulting you and your mother because your software killed their goat by mistake.

[danilocesar]

lol. It's sad that I can only upvote this once :)