Re: Runtime.getRuntime().exec() very slow in Java program.

I am trying to run the Runtime.getRuntime().exec(shellCMD) to copy
files on a linux system.
but the getRuntime.exec() is very slow, it can only copy around 2-10
documents/second to my target directory when I have 1000 files. Can
anyone give some suggestions about my code below? thanks.

for (doc ahit : docList) {

            try{
             shellCMD="cp "+ srcDir + "/"+ ahit.doc_id + " " +
tarDumpDir; //copy xml to tmp folder
                Process process = Runtime.getRuntime().exec
(shellCMD);
                //process.waitFor();
                process.getInputStream().close();
                process.getOutputStream().close();
                process.getErrorStream().close();
            }
            catch (Exception e){
             logError("Copy XML fail: " + e);
            }
        }