From my experience with Windows 7 (64-bit) and Java, a 32-bit JRE uses less memory and runs significantly faster than a 64-bit JRE (provided you don\'t need or benefit from
in /System/Library/Frameworks/JavaVM.framework/Versions
I found version 1.6 installed and changed the path for java,javac to point to
/System/Library/Frameworks/JavaVM.framework/Versions/1.6/home using environment
alias rather than the default link found in /usr/bin/