3 ms·
1B Nested Loop Iterations
- deleted 2y ago[deleted]
- fuhsnn 2y agoTo be fair, GCC even at -O1 knows the looped statement is non-observable, it's entirely optimized out: https://godbolt.org/z/afjz9h471 https://godbolt.org/z/afjz9h471
- Someone 2y agoThe C code is different, doing a bit more than the JavaScript, Python and Go versions: int main() { long array[10000]; for (int i = 0; i < 10000; i++) { for (int j = 0; j < 100000; j++) { array[i] = array[i] + j + i; // on that page array[i] = array[i] + j; // what it should be } } } I suspect/guess they added that to avoid the case where the C compiler is too smart, and forgot to make the other programs do the same thing. Also: what do they do to prevent the C compiler from removing that entire bit of code? If they don’t read the resulting data, it may well do that.