Rohan Rai

I have a simple program I tested and I realise that endl wreaks havoc on my program. Using endl, my program ran in 100+ ms while working with '\n', the time dropped to ~50ms. Can anyone tell why is there such a difference? P.S. I did read other post that somehow explained what each of them are doing, but does std::flush really take so much time? Or could there be another possible explanation?