WARNING: This page is probably out dated.
How slow is gfortran ?
Some users think that I/O is pretty bad:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23363 (fixed since 2005-10-07)
-- (http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20278) -- (fixed since 2007-10-26)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16339 (fixed since 2005-10-07)
check the mailing list for discussions on this topic.
This patch fixes many of the performance problems for unformatted array I/O: