Hi Tamar,
In general our approach is to identify areas for improvement in a benchmark and provide a testcase that's independent of the benchmark when reporting it in a PR upstream.
Sounds like a good approach, in principle. If the people who are doing the identfying know Fortran well, that would work even better (do they?), and if they could be persuaded to work on gfortran directly, that would probably be best. Regards Thomas