How to Speed up R on the G5
Simon, What settings did you change in the compiler lines? I assume this was on gcc and g77? Thanks Mike Redmond ---
Simon Urbanek wrote:
On Feb 7, 2005, at 10:47 AM, Thomas Lumley wrote:
My second question is whether there are ways other than using --with-blas="-framework vecLib", to take advantage of what I thought was the power of the G5 (or dual G5s in my case).
I haven't found anything very impressive yet (this is on an iMac G5, so with much lower bus speed).
Just enabling G5 optimizations without any other aggressive flags gave me 30% boost on the code I was testing (on a dual G5 - btw: just in case someone didn't know - for computations one R process uses only one processor). But I think vecLib should be pretty well optimized by Apple already, so I don't know of any much faster BLAS implementation for OS X ... Cheers, Simon
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