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100% speed improvement 3.4 -> 3.5 for ia64!! (?)
- From: Richard Guenther <rguenth at tat dot physik dot uni-tuebingen dot de>
- To: gcc at gcc dot gnu dot org
- Date: Wed, 14 Apr 2004 11:57:30 +0200 (CEST)
- Subject: 100% speed improvement 3.4 -> 3.5 for ia64!! (?)
Hi!
I just got the first run-time results for a gcc3.5 ia64 run with leafified
tramp3d-v3 testcase and am impressed by the improvement compared to the
3.4 release candidate. 3.4 takes 7.34s/it while 3.5 finishes in an
astonishing 4s/it. At a first glance, numerical results are within error.
Anyone has an idea what improved so much for ia64 compared to 3.4? Only
flags I'm using are -O2 -funroll-loops -ffast-math, numerics are mostly
FP multiplication/addition. Do I need to be concerned and investigate
results more closely?
Thanks for these improvements! GCC is now as fast as Intel with OpenMP on
2 processors!
Richard.
--
Richard Guenther <richard dot guenther at uni-tuebingen dot de>
WWW: http://www.tat.physik.uni-tuebingen.de/~rguenth/