[steveklabnik]

> Almost axiomatically

It's more complex than that. You also have to consider the expert vs the general case. So for example, Rust can automatically apply the equivalent of restrict to many of your pointers. An expert with 100% accuracy could do so in C, but an average C programmer may not. Thanks to the compiler, the average and the expert Rust developer will both do this all the time.

Then, there's the cases when being safer and checked by the compiler means you can be more aggressive. When writing code that needs to be maintained over time, you need to make decisions that will ensure correctness even as you modify the code. And as your staff turns over. Rust lets you do very aggressive things, while making sure that you won't say, introduce thread unsafety accidentally. Not only that, but currently, since LLVM does all optimizations, we have to deal with the ones that are designed for C or C++; Rust is already quite fast without Rust-specific optimizing.

Anyway, in the end, we'll be sometimes slower and sometimes faster than C, just generally. I think it'll be very interesting to watch over time.