Frame decoder performance question...

[infectedrhytms]

I'm testing my application using JMeter sending a simple String 50 users...

My piple is configured as follows...

pipeline.addLast("decoder", stringDecoder);
pipeline.addLast("encoder", stringEncoder);
pipeline.addLast("handler", myHandler);

And I get 4500 requests a seconds...

Now I add processing for 2 byte header

pipeline.addLast("frameDecoder", new LengthFieldBasedFrameDecoder(1024, 0,
2, 0, 2));
pipeline.addLast("decoder", stringDecoder);
pipeline.addLast("frameEncoder", new LengthFieldPrepender(2));
pipeline.addLast("encoder", stringEncoder);
pipeline.addLast("handler", myHandler);

And it drops to 245 requests per second... Any ideas?

The Jmeter Client code is as follows... I just took the Jmeter client
implementation and added the header calculation which is pretty fast.

	public void write(OutputStream os, String s) {
		try {
		
			int length = s.length();
			byte[] header = new byte[2];
			
			header[0] = (byte) ((length >> 8) & 0xff);
			header[1] = (byte) (length & 0xff);

			os.write(header);
			os.write(s.getBytes());
			os.flush();
		} catch (IOException e) {
			log.warn("Write error", e);
					}

		log.debug("Wrote: " + s);
		return;
	}



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