Benchmark comparison is weird when opposite's implement doesn't exist

I came to this site to compare the execution speeds of Java and C++, and I saw the following: the Java source code was the fastest, and the C++ source code didn't even show up in the rankings.

I thought this was odd, so I dug deeper and realized that the algorithm implemented in Java was not implemented in C++.

In the first link, you can see that C++ and Java are properly compared, but in the second link, it doesn't look right because it is compared to the unimplemented C++ code.

After seeing this, I think it shouldn't show up unless there is code implementing the algorithm in another language.