I can't seem to get mclapply to use more than a single core. I have a 64
core server running Linux.
Fore example:
library(parallel)
test <- lapply(1:100,function(x) rnorm(10000))
system.time(x <- lapply(test,function(x) loess.smooth(x,x)))
system.time(x <- mclapply(test,function(x) loess.smooth(x,x), mc.cores=32))
gives me:
user system elapsed
0.000 0.000 7.441
user system elapsed
0.000 0.000 8.868
i.e. mclapply is taking longer than lapply(). What is going wrong here?
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