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.

I've run into a little bit of a problem. I am currently developing a scientific app for MacOS X Carbon, Windows XP .NET, and Linux GTK+ (later on) in C++ that connects to an Intersystems Cache OODBMS ...