If the compiler can be sure that there is no bounds checking needed and can skip it. Rust provides facilities for this, C and C++ less so. We have seen time an

If the compiler can be sure that there is no bounds checking needed and can skip it. Rust provides facilities for this, C and C++ less so. We have seen time and time again that humans aren't good enugh at that task, even in low-level code (and 2x is very buch an outlier).