Confused About Rprof with R

Question

I'm confused as to how to get Rprof to work with R.

I followed the sample in the documentation and had something like

Rprof(filename="testProfile.out")
test()
Rprof(NULL)
summaryRprof("testProfile.out")

However, inside testProfile.out, I had one line : sample.interval=20000

This confuses me and when I run summaryRProf, I get no events were recorded

Any suggestions would be appreciated.

What does test() do? Rprof profiles working code. So if test() returns an error that the function test() could not be found, there are no events to be recorded. — tophcito, Apr 07 '13 at 19:07
Perhaps this helps: http://stackoverflow.com/a/15821706/289572 — Henrik, Apr 07 '13 at 20:16
Mmm.. lets say that test = function() { for (i in 1:50) print(i) } — user1431282, Apr 07 '13 at 20:29
change `1:50` to `1:5000` and you'll start seeing stuff. As is, your `test()` is just too fast for the default `interval = 0.02`. You could also just try to profile `for (i in 1:100) test()`. — flodel, Apr 07 '13 at 20:36
Hi Flodel, that indeed fixed it. If you answer the question I will accept it. — user1431282, Apr 11 '13 at 21:39

score 3 · Accepted Answer · answered Apr 16 '13 at 02:58

The issue was that my test was completing too quickly and Rprof was not logging at fast enough intervals. To fix, this you can either set interval = 0.0002 or some number smaller than the default value (0.02). I was also able to fix this by running my test for multiple iterations.

Confused About Rprof with R

1 Answers1