If besides best possible performance you also value ergonomics, security, maturity and tooling then IMO nothing comes close to C++, especially C++17 and later.

If besides best possible performance you also value ergonomics, security, maturity and tooling then IMO nothing comes close to C++, especially C++17 and later. Not that there is much choice really, only C and Rust can realistically get you comparable performance, each with their own problems.