Hello all,
My problem is similar to Sergey's.
I could not try what Mario suggested, since doMPI is not available for
windows.
I have tried the Cedrick's commands, i.e.
cl.tmp = makeCluster(rep("localhost",2), type="SOCK")
registerDoSNOW(cl.tmp)
but this is instead increasing the time taken. For Sergy's set of commands,
i get,
> x <- numeric(10000)
> system.time(for(i in 1:10000) x[i] <- sqrt(i))
user system elapsed
0.03 0.00 0.03
> system.time(system.time(x <- foreach(i=1:10000, .combine="c") %do%
> sqrt(i)))
user system elapsed
4.71 0.00 4.71
> system.time(system.time(x <- foreach(i=1:10000, .combine="c") %dopar%
> sqrt(i)))
user system elapsed
7.35 1.07 127.06
i.e. %dopar% is taking longer than %do%
Please guide me.
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