[Bug libfortran/21820] Really, really, horrible IO performance

[fxcoudert at gcc dot gnu dot org]

------- Additional Comments From fxcoudert at gcc dot gnu dot org  2005-05-31 10:46 -------
Additional info: disabling MMAP (#undefining HAVE_MMAP in unix.c) gives far
better performance (in fact, I can see no performance penatly at all).

Perhaps a survey of the cases where mmap induces performance gains and losses
would be usefull...

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21820