[R] Rprof causing R to crash

[jim holtman]

Could you be a little more explicit of what the error message is.  On
my Windows system 32-bit, I get the following:

> Rprof()
> z <- 1
> system.time(for (i in 1:1e8) z <- z + 1/i)
Error: cannot allocate vector of size 381.5 Mb

Which is probably due to trying to allocate 1e8 elements of integers
(400MB).  Could you have a similar problem?

Now you could restructure your code to not allocate the large vector by:

Rprof()
z <- 1
i <- 0
system.time(while((i <- i + 1) < 1e8) z <- z + 1/i)
z
Rprof(NULL)

On Mon, Feb 4, 2013 at 7:48 AM, c97sr <sr at stevenriley.net> wrote:
> Am also having trouble with Rprof.
>
> I am using on R 2.15.2 on the Mac (Platform: x86_64-apple-darwin9.8.0/x86_64
> (64-bit)).
>
> The example above without profiling takes around a minute to run:
>
>> z = 1
>> for (i in 1:1e8) z = z+1/i
>> z
> [1] 19.9979
>
> With profiling:
>
>> Rprof()
>> z = 1
>> for (i in 1:1e8) z = z+1/i
>
> [INFO] Feb 4, 2013 12:45:20 PM - R stopped.
>
> Crashes within a second or so.
>
> This is consistent with the problem I'm having in my own code in which there
> is a reasonable amount of memory used (but not a massive amount).
>
> Any help much appreciated. Am happy to post this as a bug if that is now
> appropriate.
>
> regards
>
> Steven
>
>
>
> --
> View this message in context: http://r.789695.n4.nabble.com/Rprof-causing-R-to-crash-tp4652846p4657482.html
> Sent from the R help mailing list archive at Nabble.com.
>
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-- 
Jim Holtman
Data Munger Guru

What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.