Java APIs

Hi everyone,

I'm trying to send several commands to a server and for each command read one or more lines as response. To do that I'm using a good old Socket connection. I'm reading the response lines with BufferedReader.readLine, but it's very slow. VisualVM says, that

SocketInputStream.read(byte[], int, int)

is consuming most of the cpu time. A perl script, which does the same job, finishes in no time. So it's not a problem with the server.

I'm runnning

java version "1.6.0_12"
Java(TM) SE Runtime Environment (build 1.6.0_12-b04)
Java HotSpot(TM) Server VM (build 11.2-b01, mixed mode)

on

Linux henni 2.6.25-gentoo-r7 #3 SMP PREEMPT Sat Jul 26 19:35:54 CEST 2008 i686 Intel(R) Core(TM)2 Duo CPU E6550 @ 2.33GHz GenuineIntel GNU/Linux

and here's my code

private List<Response> readResponse() throws IOException {
        List<Response> responses = new ArrayList<Response>();
        String line = "";
        while ( (line = in.readLine()) != null) {
            int code = -1;
            try {
                code = Integer.parseInt(line.substring(0, 3));
                line = line.substring(4);
            } catch (Exception e) {
                code = -1;
            }
            
            // TODO create different response objects ?!?
            NotImplemented res = new NotImplemented(code, line);
            responses.add(res);
            
            // we received an "end of response" line and can stop reading from the socket
            if(code >= 200 && code < 300) {
                break;
            }
        }
        return responses;
    }

Any hints are appreciated.

Best regards,
Henrik