[Bug libfortran/78549] Very slow formatted internal file output

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78549

--- Comment #9 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Gfortran is even slower now (~9.5s), likely revision r251374 (pr78387).