Linked by Thom Holwerda on Fri 20th Feb 2009 15:49 UTC, submitted by Michael
Benchmarks "Earlier this month we published an article looking at the Linux versus OpenSolaris performance when using the new AMD Shanghai Opteron CPUs. Ubuntu Linux was faster than OpenSolaris 2008.11 in nearly all of the tests, but as mentioned in that article, OpenSolaris is still dependent upon GCC 3.4 where as Ubuntu and most other Linux distributions are now shipping with the newer and much-improved GCC 4 series. Following that article being published, Sun Microsystems had requested some compiler tests since they were confident the results would be different had their Sun Studio compiler been used. Well, in this article we now have some OpenSolaris benchmarks from the same AMD setup using GCC 3.4, GCC 4.0, and Sun Studio 12."
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RE: GCC 4.0.2
by DittoBox on Fri 20th Feb 2009 17:10 UTC in reply to "GCC 4.0.2"
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Your concerns are noted at the end of the article:

"Some of the Sun Studio slowdowns may be explained by a majority of the open-source projects targeting GCC as their compiler and catering their compiler flags to the GNU Compiler Collection with little or no optimizations for Sun Studio. At the same time, however, it is also worth noting the current stable series for GCC is 4.3. The BlastWave packages for GCC4 were at version 4.0.2, which is outdated and since then GCC has picked up support for SSE4 and various other features."

Also consider that they are doing these tests on the same hardware and same OS. My very light googling suggests that getting a hold of 4.3 on OpenSolaris is a bit of task and is not at all a "stable" package. Not the best if you're trying to operate psuedo-scientific tests.

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