The integration of these two products provides a very usable integrated development environment. A primary advantage of the Code Fusion IDE is its quick visual access to project files, commands and build configuration files. Another positive attribute of Code Fusion is the compiler. It has been optimized for the Intel Pentium processors.
Some benchmarks indicate a significant improvement in compile speeds.
Unfortunately, my code was too short to get a good measure of the compiler's true speed improvement. GCJ is a front end for the gcc compiler. GCJ accepts .java, .class, .jar and .zip file types. Using the -C option, gcj makes .java files into .class files. GCJ is capable of natively compiling both Java source and bytecode.