Socket InputStream read , slow performance

Question

Hi ,
We have developed a java socket appliction ,
This application will be connected to a configured client socket .
client socket will send huge no of messages to our application , our application will receive the messages and do the need full things,and send the acknowledgement to the client.
In order to receive the messages we are using the code like this
public void run(){
socket_InputSteram = Socket.getInputStream()
while(true){
// read the message from the connected socket input stream.
readMessage( socket_InputSteram );
now comes the actual problem , for some number of messages our application is stable and doing well , after some time our application is taking almost 100% CPU and very slow.
can any body help me why our application is taking 100% CPU , why it is faster in the initail stage and it is very slow after some time . what are the necessary steps we have to take inorder to read the socket input stream.
i would be very thank full, if any body can provide the solution
Thanks,
SPK Srinivas.

Answer 1

Is it actually using CPU time or only wallclock time? In the latter case it's probably just waiting for more data to arrive and you should concentrate on the next method(s) in the list.
If it's actually using up CPU, then you might want to check if you're using it inefficiently.
Prime examples: Reading a single byte at a time. If you do something like this:
int b;
while ((b = in.read()) != -1) {
  // do something
}Then you're doing something wrong and should read into a buffer (byte-array) instead.