Hi Peter, thank you. I've run the full benchmark in my setup and uploaded the updated cumulative results to http://cr.openjdk.java.net/~mhaupt/8031043/.
The benchmark indeed shows that this latest addition to the group slows down random and sequential access, especially for small numbers of values and classes. The OpenJDK tests are fine; I'm running a batch of internal tests as well. Given that one concern with this issue, next to reducing footprint, was to optimise for the single-value case, I'm still a bit hesitant even though the sheer amount of code reduction is impressive. I'll evaluate further. Best, Michael > Am 05.05.2016 um 17:21 schrieb Peter Levart <peter.lev...@gmail.com>: > > Hi Michael, > > > On 05/04/2016 06:02 PM, Michael Haupt wrote: >> Hi Peter, >> >> thank you for chiming in again! :-) I'll look at this in depth on Friday. > > Good. Because I found bugs in expunging logic and a discrepancy of behavior > when a value is installed concurrently by some other thread and then later > removed while the 1st thread is still calculating the value. Current > ClassValue re-tries the computation until it can make sure there were no > concurrent changes to the entry during its computation. I fixed both things > and verified that the behavior is now the same: > > > http://cr.openjdk.java.net/~plevart/misc/ClassValue.Alternative2/webrev.02/ > <http://cr.openjdk.java.net/~plevart/misc/ClassValue.Alternative2/webrev.02/> > > Regards, Peter -- <http://www.oracle.com/> Dr. Michael Haupt | Principal Member of Technical Staff Phone: +49 331 200 7277 | Fax: +49 331 200 7561 Oracle Java Platform Group | LangTools Team | Nashorn Oracle Deutschland B.V. & Co. KG | Schiffbauergasse 14 | 14467 Potsdam, Germany ORACLE Deutschland B.V. & Co. KG | Hauptverwaltung: Riesstraße 25, D-80992 München Registergericht: Amtsgericht München, HRA 95603 Komplementärin: ORACLE Deutschland Verwaltung B.V. | Hertogswetering 163/167, 3543 AS Utrecht, Niederlande Handelsregister der Handelskammer Midden-Nederland, Nr. 30143697 Geschäftsführer: Alexander van der Ven, Jan Schultheiss, Val Maher <http://www.oracle.com/commitment> Oracle is committed to developing practices and products that help protect the environment
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