CppCon 2014: Andrei Alexandrescu "Optimization Tips - Mo' Hustle Mo' Problems" 

CPP MAN

@@notinlist He's actually D MAN

5% difference in core of language or popular libraries is like you know eliminating few data centers. Billions of dollars worth.

Well, on current Clang and GCC (in 2021) using `goto` and using two `delete`s produce same code.

As he says, it makes the (compiled) code smaller, which often means faster since more stuff fits in the instruction cache. Though in this case I guess he could just have it be the last thing in the function since both branches go there anyway. (Edit: nah, I thought of it wrong -- it can't just go in the end.)