Hello, I retry the test and now it look good. 0.2 ms per roundtrip. It's similar to the ping time. I'm not sure what was wrong with the first test run. -- View this message in context: http://netty-forums-and-mailing-lists.685743.n2.nabble.com/netty-performance-tp6588064p6613452.html Sent from the Netty User Group mailing list archive at Nabble.com.