The CPU is the CPU regardless of what language you are running on it. C will still give you the best performance on a modern CPU.
If anything, C has an even bigger advantage on modern CPUs because it has easier access to things like vectorize/SIMD intrinsics. It is also easier to tweak your data dependencies to help the branch predictor.
> If anything, C has an even bigger advantage on modern CPUs because it has easier access to things like vectorize/SIMD intrinsics. It is also easier to tweak your data dependencies to help the branch predictor.
Have you seen the ridiculously complex optimizations that C compilers do to maybe turn some shitty for loop into vector instructions? C is terribly bad fit for this use case and hardware tries to get closer to C than the reverse.
C++, Rust but even C# and Java has much better SIMD support than C has.
EDIT: It really doesn’t help C (and some of the listed languages as well) that they are very imperative. SIMD is exactly the place where pureness and some form of FP is much better at allowing these kind of optimizations (a map of a pure function can be “trivially” optimized into vector instructions, while it is really hard to decide whether this for loop is safe to convert, and it is really up to the heuristics of the compiler. A bit of rearrangement can cause a failure to optimize, resulting in a huge drop in performance)
