Hi Steven; We were able to get some parts of your UUID patch into Java 8 but I unfortunately didn't get time to get all the pieces in before the Java 8 rampdown began. I was hoping to get the parsing part in next as it seemed to have a bigger payoff than the remaining toString() changes. These changes will likely happen early in Java 9 repo and then can be backported to Java 8.
I will followup with Robert's patch as well. Mike On Nov 11 2013, at 11:39 , Steven Schlansker <stevenschlans...@gmail.com> 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. > > 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 >
