The webrev and patch are here http://cr.openjdk.java.net/~bpb/7032154/
And the pertinent recent review in this thread http://mail.openjdk.java.net/pipermail/core-libs-dev/2013-May/017317.html The changeset comment is: 7032154: Performance tuning of sun.misc.FloatingDecimal/FormattedFloatingDecimal Summary: Performance improvements for double/float -> String and decimal/hex String -> double/float conversions. Reviewed-by: martin Contributed-by: brian.burkhal...@oracle.com The substantial majority of the work for this patch was completed by Sergey Kuksenko a couple of years ago. It was since ported to the current repository tip, a couple of bugs were found and fixed, some refactoring and code and comment cleanup were done, and JML annotations added. Thanks to Dmitry Nadezhin and Olivier Lagneau for helping to verify and improve the changes and to Martin Buchholz and Iris Clark for reviewing them. Thanks, Brian