Why is buffering in C++ important?

Question

I tried to print Hello World 200,000 times and it took me forever, so I have to stop. But right after I add a char array to act as a buffer, it took le

Answer 1

The cout function contains a lot of hidden and complex logic going all the way down the the kernel so you can write your text to the screen, when you use a buffer in that way your essentially do a batch request instead of repeating the complex I/O calls.