I too am amazed. He wrote a code which will throw in 50% cases or already very fast code `(random() % 2 == 0)`. Hell yes, a huge performance penalty is expected

I too am amazed. He wrote a code which will throw in 50% cases or already very fast code `(random() % 2 == 0)`. Hell yes, a huge performance penalty is expected. But what about `nullptr == fopen(..)`? I bet the performance penalty would be negligible here.