Nobody can help you without a lot more information, though there are some obvious places to start, like pre-allocating objects rather than growing them inside a loop.
You can get a good discussion of how to profile your code here: http://adv-r.had.co.nz/Profiling.html Sarah On Mon, Mar 14, 2016 at 5:55 PM, Ragia . <ragi...@hotmail.com> wrote: > thanks for answering > the program is simulation it runs on data ( wish is taken from file to memory > once) but it runs about 10k times and in each mad some calculations ? > > hope this clear the problem, > > > > Ragia > > > ---------------------------------------- >> Date: Tue, 15 Mar 2016 08:45:56 +1100 >> Subject: Re: [R] How to speed up R program >> From: drjimle...@gmail.com >> To: ragi...@hotmail.com >> CC: r-help@r-project.org >> >> Hi Ragia, >> Improving the efficiency of a program usually requires detailed >> analysis of what it is doing and how those operations can be performed >> more rapidly. That is to say, without knowing what the program is >> supposed to accomplish and how it is doing it now, very little help >> can be provided. One thing you might look for is "disk-thrashing" >> where your storage media (e.g. hard disk) is being accessed >> continuously. This usually indicates that the program is swapping out >> data to the disk, which is typically slow compared to processing it in >> memory. >> >> Jim >> >> >> On Tue, Mar 15, 2016 at 8:32 AM, Ragia . <ragi...@hotmail.com> wrote: >>> >>> >>> >>> >>> Dear group >>> I have two R sessions running on Ubuntu 14.0x server , and I found that my >>> program will take too long time to be finished( months...!), I used top >>> command and found that cpu usage is 21.3%. >>> >>> the server is Enterprise SP-64 - 64G E5-1630v3 SoftRaid 2x2 TB Server . 6 >>> core >>> >>> how can I speed the program, kindly I need tutorial or book chapter that >>> helps.. >>> thanks in advance >>> Ragia >>> >>> ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.