If and only if someone has taken time to write specific optimizations for your specific CPU.

In embedded land, if your microcontroller is unpopular, you don't get much in the way of optimization. The assembly GCC generates is frankly hot steaming trash and an intern with an hour of assembly experience can do better. This is not in any way an exaggeration.

I've run into several situations where hand-optimized assembly is tens of times faster than optimized C mangled by GCC.

I do not trust compilers anymore unless it's specifically for x86_64, and only for CPUs made this decade