On 11.11.2013 19:39, Steven Schlansker wrote:
On Nov 6, 2013, at 4:19 PM, Robert Stupp <sn...@gmx.de> wrote:
Hi,
the current implementation of java.util.UUID.fromName() and java.util.UUID.toString()
unnecessarily produce a lot of temporary objects. Especially the fromName() method
creates some instances of java.lang.Long and indirectly via "name.split()" many
Strings, an ArrayList, etc. UUID.toString() creates at least 10 String objects plus the
implicitly created char[] instances.
Here's a hg diff which reduces the temporary object count while still providing
the same functionality.
Hi Robert,
I identified the same problem and submitted a patch earlier this year:
http://mail.openjdk.java.net/pipermail/core-libs-dev/2013-January/013494.html
http://osdir.com/ml/core-libs-dev/2013-03/msg00403.html
Sorry I don’t have the best list message references here, Oracle seems to have
decided to break all the links through the old Sun bug database, so all my
references are gone. Bummer. :(
It’s currently living at CR 8006627 and CR 8007398, although I’m having real
trouble finding a public link to the bugs.
With the new JBS its so easy to find:
https://bugs.openjdk.java.net/browse/JDK-8006627
cheers
Andreas
Last I heard, Mike (CCed) has this in a patch queue somewhere waiting to commit
it. Maybe he will take the good parts from my patch and the good parts from
your patch and make an even better patch :)
Regards,
Steven Schlansker
