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Re: gfortran: the good news and the good news
Toon Moene wrote:
Hans Horn wrote:
Toon Moene wrote:
Oops - he said "Cygwin/WinXP" - now *that's* Stone Age material ....
yup - its just plain 32 bit mode (don't I feel like a dinosaur now?).
Well, what you *should* feel is the pain that you don't get *another* 20
% performance increase when running your laptop in 64 bit mode (I've
been using laptops like that - under Debian - since mid-2005).
64 bits gives you more integer and floating point registers, SSE
instructions by default (you didn't enable them on your compilation),
hence vectorization (at -O3), etc.
With one of the sse enabling options (even -march=pentium-m),
auto-vectorization would be enabled under -O3 , even under cygwin.