Java TCP socket: data transfer is slow

Question

I set up a server with a ServerSocket, connect to it with a client machine. They\'re directly networked through a switch and the ping time is <1ms.

Now, I try to

Answer 1

Hey, I figured I'd follow up for anyone that was interested.

Here's the bizarre moral of the story:

NEVER USE DataInputStream/DataOutputStream and sockets!!

If I wrap the socket in a BufferedOutputStream/BufferedInputStream, life is great. Writing to it raw is just fine.

But wrap the socket in a DataInputStream/DataOutputStream, or even have DataOutputStream(BufferedOutputStream(sock.getOutputStream())) is EXTREMELY SLOW.

An explanation for that would be really interesting to me. But after swapping everything in and out, this is what's up. Try it yourself if you don't believe me.

Thanks for all the quick help, though.