https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78549
--- Comment #2 from mecej4 at operamail dot com --- Thanks, Martin. After posting, I found that I could add more add more attachments, but I was a bit worried that, as in other forums, the initial post could not be edited or modified. I presume that you ran your confirmation runs on Linux. Even if the Fortran version is three times slower than the C version, as you found, perhaps one could live with that. However, on Windows(+Cygwin,Mingw,etc.) the performance of the Fortran version is terrible, and I think that this reflects poorly on the otherwise fine Gfortran compiler, which often outperforms expensive commercial Fortran compilers in the quality of the generated code. A collaborator tells me that the problem did not exist in the Windows/MinGW release of Gfortran 4.9.3. I could not test that assertion myself because the installer failed on my Windows 10 system.
