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In order to get the fastest transfer speeds over TCP in Java, which is better: Option A: InputStream in = socket.getInputStream(); OutputStream out = socket.getOutputStream(); Option B: BufferedInputStream in = new BufferedInputStream(socket.getInputStream()); BufferedOutputStream out = new BufferedOutputStream(socket.getOutputStream()); I've read that performance takes a hit when writing over 8 KiB to OutputStream, it was recommended that it'd be written to it in small chunks not pver 8 KiB at a time. 8 KiB is the default buffer size of a BufferedOutputStream. However I've also read that when transfering data over the net it's good to flush out the bytes as quickly as possible. Meaning that using a buffer and writing in small chunks adds a unneeded overhead. So, option A or option B? Which works best? Right now I'm guessing option A gives highest transfer speeds while consuming a lot more CPU than option B. Option B might be better since it doesn't go that much slower but saves a lot of CPU. -- Bonus question: Is it a good idea to touch the TCP window size? For example by setting it to 64 KiB: socket.setReceiveBufferSize(65536); socket.setSendBufferSize(65536); I tried setting it to 128 KiB on a test machine since I read that it could increase speeds but when the server got a couple of connections the CPU were at 100% instead of ~2% like when I left it alone. I guess 128 KiB is way too high unless you've got a good server that can handle that rush in traffic, but is it smart to set it to something like 32 KiB? I think the default was 8 KiB there for me. ("socket" is "java.net.Socket")

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