Quote
This check replaces default bodies of special member functions with = default;. The explicitly defaulted function declarations enable more opportunities in optimization, because the compiler might treat explicitly defaulted functions as trivial.

$ grep -r "::~" src/ | grep '{}' | wc -l
2
$ grep -r "()" src/ | grep '{}' | wc -l
24
$ grep -r "= default;" src/ | wc -l
0

something()
{
}