64 Bit Java is slower than 32 Bit.
I was running a Linux 64 JDK 1.5 JVM, and doing large software builds.
The ant builds, which would involve some file operations and come javac compiling took about 6:30 to complete. After changing my JVM to the 32 bit version they completed in 4:15.
Is the 64 bit Java support really so bad?