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.

If you didn’t know better, you might believe that Sun Microsystems had designed the JNI (Java Native Interface) API with the goal of discouraging Java developers ...

It's a commonly asked question in a world where every software developer wants to get the most out of every clock cycle their programs consume. It was also a topic at a Java "Birds of a Feather" ...