[R] R process slow down after a amount of time

R. Michael Weylandt <michael.weylandt@gmail.com> michael.weylandt at gmail.com
Tue Apr 16 16:04:39 CEST 2013

On Apr 16, 2013, at 9:52 AM, Chris82 <rubenbauar at gmx.de> wrote:

> Hi R users,
> I have mentioned that R is getting slower if a process with a loop runs for
> a while. Is that normal?
> Let's say, I have a code which produce an output file after one loop run.
> Now after 10, 15 or 20 loop runs the time between the created files is
> stongly increasing.
> Is there maybe any data which fill some memory?

Possibly, but I were to put money on it, I'd guess there's an ever-expanding object problem:

x <- NULL
for(i in 1:1e6) x <- c(x, rnorm(1))

which is not-so-secretly quadratic and should instead be: x <- rnorm(1e6)

Perhaps a small reproducible example would help us help you. 


> Chris
> --
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