It's subjective because it can't be used as a source of truth. Of course "I measured X and my results were Y using methodology Z" can be a statement of fact but

It's subjective because it can't be used as a source of truth. Of course "I measured X and my results were Y using methodology Z" can be a statement of fact but X and Z are where the subjectivity lie. For example, benchmark game allows for warmups and so does awfy. This favors jits because it allows them to warm up when they would otherwise be slower. This might give the mistaken impression that java is a great choice for command line tools due to the performance characteristics. In contrast, most benchmarks I've seen don't use profiler guided optimizations for C or C++. Hence the subjectivity. And the claim of only wanting idiomatic code in awfy. This is, of course, subjective as well.