Lines of Code and Optimisation

Hi, I'm relatively new to programming and I have a question.

Does few LoC == faster? Or is it in the algorithm itself? Is there an instance where more LoC is faster than the shorter one?

Does few LoC == faster?
No.

Or is it in the algorithm itself?
Kind of.

Is there an instance where more LoC is faster than the shorter one?
I/O buffering for instance.