Re: A 2 % gain for the past week on my code.

2010-03-07 Thread Jack Howarth
On Sun, Mar 07, 2010 at 08:17:54PM +0100, Toon Moene wrote: > Jack Howarth wrote: > >> Toon, >>I would suspect this boost is from the series of changes >> to "Update default arch for x86" from HJ Lu. This should now >> have -msse2 in use as the default (except on darwin where >> we went to -mss

Re: A 2 % gain for the past week on my code.

2010-03-07 Thread Toon Moene
Jack Howarth wrote: Toon, I would suspect this boost is from the series of changes to "Update default arch for x86" from HJ Lu. This should now have -msse2 in use as the default (except on darwin where we went to -msse3 since all of our processors support that). That could well be. I now c

Re: A 2 % gain for the past week on my code.

2010-03-07 Thread Jack Howarth
Toon, I would suspect this boost is from the series of changes to "Update default arch for x86" from HJ Lu. This should now have -msse2 in use as the default (except on darwin where we went to -msse3 since all of our processors support that). Jack On Sun, Mar 07, 2010 at 07:34:22P

A 2 % gain for the past week on my code.

2010-03-07 Thread Toon Moene
L.S., In the past week, changes to GNU Fortran / GCC brought me a 4 minute gain in a 3.5 hour weather forecast (run 4 times a day on my home computer - see http://moene.org/~hirlam/) 4 minutes on 210 minutes is ~ 2 % - not bad for such a diverse code. Without digging deeper in it (for which