[R] (performance) time in Windows vs Linux

[Patrick Connolly]

On Fri, 26-Jun-2009 at 04:37PM -0400, milton ruser wrote:

|> Hi there,
|> 

|> I have both systems on a DELL 64bit machine.

|> I compiled R 2.9.0 on both systems, to get 64bits capability.
|> Surpriselly, on Linux (Ubuntu with I installed 3 month ago) I spent
|> 41s to run the same test you did, and less time (35s) under
|> Vista. In fact I had noticed that I not have gained time when
|> running under linux (I had done jobs that run for several
|> days). But somethings I gain with memory managment, because for
|> some programs or steps, windows say that memory is full, while
|> Linux run up to the end of the job.

I think there's a simple explanation for both of those observations.
Your Windows installation is more than likely using both cores (or 4
if you have a quad core) while your Linux is using only 1 of them.

best

-- 
~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.   
   ___    Patrick Connolly   
 {~._.~}                   Great minds discuss ideas    
 _( Y )_  	         Average minds discuss events 
(:_~*~_:)                  Small minds discuss people  
 (_)-(_)  	                      ..... Eleanor Roosevelt
	  
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