Java JNI slows down unexpected

Question

I'm trying to implement a java wrapper for RCSwitch in a Raspberry Pi. It works fine until the grabbing method reaches the 80th iteration. Then it slows down and I can't figure out why. It needs more than 5 minutes to return with a value. I tried to figure out the problem, but I'm not out of memory, the raspberry still has more then 300mega. In spite ot this, I tried to run the JVM with the following parameter:-Xms5m -Xmx5m but the program still slowed down at the 80th iteration so I think its not a memory problem. My sender still sends the value, because if I restart the program it's working again until the 80th iteration, so it's not the lack of input data.

Here is the java part of the code:

public class RCSwitchWrapper {
    public native int recievedValue(int PIN);
    static{System.loadLibrary("RCSwitchWrapper");}

    public static void main(String[] args){
        RCSwitchWrapper wrapper = new RCSwitchWrapper();
        int counter=0;
        while(true){
            counter++;
            int grabbedData = wrapper.recievedValue(2);
            System.out.println(counter+" grabbed data: "+grabbedData);
        }
    }
}

The C++ part of the code:

#include "RCSwitch.h"
#include "RCSwitchWrapper.h"
#include <stdlib.h>
#include <stdio.h>
#include <iostream>

RCSwitch mySwitch;
JNIEXPORT jint JNICALL Java_RCSwitchWrapper_recieveValue(JNIEnv *env, jobject obj,jint PIN){
    if(wiringPiSetup()==-1){
        printf("wiringpi error \n");
        return 0;
    }
    mySwitch = RCSwitch();
    mySwitch.enableReceive(PIN);
    while(1){
        if(mySwitch.available()){
            int value = mySwitch.getReceivedValue();
            return value;
        }
        mySwitch.resetAvailable();
        return(-1);        
    }
} 

Now I'm confused and can't think a solution.

Thanks in advance.