[neopallium]

The Rust compiler can auto-vectorize loop code.

This blog post shows how to write simple idiomatic Rust code that will allow the compiler to auto-vectorize:

http://cliffle.com/p/dangerust/6/

[jcelerier]

But, C and C++ compilers also can autovectorize quite well. I had some SSE & AVX algorithms where the compiler ended up doing the same or lightly better job in C++ for instance.

So maybe it's just the C benchmark being a cargo cult.