c code when it comes to network programming. How much delay would the java-code add compared to a program written in c (under linux). I've got a quite a bit of experience here, and the answer is ...

Here's what I've learned over 20 years of working with both C++ and Java (and more years before that with C++): As a rule of thumb, when you convert optimized C++ to Java, the code is about 3x slower.