Function Call vs Virtual Function Call

__attribute__((noinline))
int Compute(int a, int b) {
  return (a * 3 + b * 7) ^ (a - b);
}

for (auto i = 0u; i < arr.size(); ++i) {
  sum = Compute(sum, arr[i]);
}

^ This is Faster?

struct Base {
  virtual int Compute(int a, int b) = 0;
};

Base* impl = GetImpl(); // not known at compile time

for (auto i = 0u; i < arr.size(); ++i) {
  sum = impl->Compute(sum, arr[i]);
}

^ This is Faster?

* The benchmark is run under AMD Ryzen 9.

* For the full benchmark code, please refer here.

* For illustration purposes only, see FAQ for more details.