C++ most efficient way to convert string to int (faster than atoi)

Question

As mentioned in the title, I\'m looking for something that can give me more performance than atoi. Presently, the fastest way I know is

atoi(mystring.c_str(         


        

Answer 1

Why not use a stringstream? I'm not sure of its particular overhead, but you could define:

int myInt; 
string myString = "1561";
stringstream ss;
ss(myString);
ss >> myInt;

Of course, you'd need to

#include