[Bug libfortran/127893] [14/15/16/17 regression] Severe libgfortran parallel-I/O performance regression on macOS since r14-6425

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127893

--- Comment #2 from Drea Pinski <pinskia at gcc dot gnu.org> ---
Note aarch64-darwin support is not upstream yet.  So the question is does this
also happen on x86_64-darwin; I would assume yes.

Also this seems like something also to report to Apple about their rwlock
implmentation to improve there.