[R] OT: Any reason why one of my computers is so slow?

[Bos, Roger]

This is not a criticism of R, but R runs much slower on one of my machines than it does on the others, so something is wrong with that machine, but I don't know where to look for a remedy.  Here are the details:

I have a 32-bit win xp machine running at 2.66Ghz and a 64-bit win 7 machine running at 3.00 GHz.  I have noticed that the win 7 machine seems slower, so I ran the rbenchmark example of creating a vector from 1:10^8 five times and the win xp machine scored 1.6 seconds while the win 7 machines scores 3.0 seconds.  Both machines are about 3 years old.  I expect a 64-bit to be slightly slower for some operations, but I just bought a new 64-bit PC for home that I runs at 3.1 GHz and it scores 0.64 seconds.  Therefore I will likely buy a new PC to replace my win 7 machine, but its still nagging me that a Xeon 3.0 processor would be so much slower than my other machines.  The machines have different numbers of cores, but that shouldn't matter since R is single threaded.

I have a access to a number of machines at work, but the win 7 machine is the only one with 16Gb of RAM.  Like I said, I will probably replace the win 7 machine, but if anyone has any suggestions I would love to try them.

Thanks,

Roger

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