How to read efficiently from socket using Java NIO

Question

I am working on task involving reading from the socket trading quotes and I need to achieve minimum latency and high throughput.

I started with the simpliest possible ja

Answer 1

Assuming you can adapt your parser API to accept (byte[] buffer, int offset, int length) as arguments, you can just pass (bb.array(), 0, bb.limit()) as parameters and not have to create the new byte[] at all per read. However this isn't likely to be the rate-determining step.

Answer 2

You can achieve higher than that with Disruptor and other methods. A lot depends on the size and complexity of message (as well as what you do with the message !!)

If you want to serialize/deserialze with ByteBuffer, use the putXxxx and getXxxx methods. To make this process easier, I suggest putting the length of each message first so you can check you have a full message before attempting to parse it.

You might find this presentation interesting http://vanillajava.blogspot.com/2011/11/low-latency-slides.html