http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50016
Summary: The fortran program 's io is very slow Product: gcc Version: 4.6.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libfortran AssignedTo: unassig...@gcc.gnu.org ReportedBy: xunxun1...@gmail.com Host: *-*-mingw* Target: *-*-mingw* Build: *-*-mingw* I found that if I write some binary file operation in gfortran4.6.1, the io becomes very slow, but gfortran4.5.* is very fast.