[R] How to speed up R program

Ragia . ragia11 at hotmail.com
Mon Mar 14 22:55:48 CET 2016

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, 


> Date: Tue, 15 Mar 2016 08:45:56 +1100
> Subject: Re: [R] How to speed up R program
> From: drjimlemon at gmail.com
> To: ragia11 at hotmail.com
> CC: r-help at 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 . <ragia11 at 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
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