https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91030
--- Comment #14 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> --- (In reply to David Edelsohn from comment #13) > Why should -fconvert affect the strategy for writing? Hi David, very interesting bug report and a good question. I would like to investigate further if I know what platform this is on. Since GPFS is a parallel operating system that is potentially going across a network, it could be depending on the test environment. Also, there are a few cases where code paths in libgfortran can depend on OS features. So in your results here: > With EXT4: difference is 2x > With SHM: difference is 4.5x > With GPFS: difference is 10x > > Is libgfortran doing something unusual with the creation of files? Are all your results here under identical OS and are the physical drives local to the test machine hardware? If we can reproduce this on a gcc compile farm machine or maybe at OSU Open Software lab which I can access, we ought to be able to do better.
