[Bug libfortran/78549] [8 Regression] Very slow formatted internal file output

[jvdelisle at gcc dot gnu.org]

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

--- Comment #15 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
For my own baseline:

gcc6: real      0m6.948s

gcc7: real      0m9.906s

gcc8: real      0m10.415s

I backported removal of the caching mentioned in comment #14 to gcc7. The two
should be identical except that gcc7 is a released branch. IIRC released
branches have debugging code removed. I do not know if this accounts for the
difference between gcc7 and gcc8.