Anything in hs25-b47 or b47 that would cause a significant performance regression?

Alan Bateman Alan.Bateman at
Thu Sep 12 04:10:03 PDT 2013

This is a long shot but does anyone know of any performance regressions 
that might have crept in recently, specifically in jdk8-b105 or 
jdk8-b106 (hs25-b47 or hs25-b48).

jdk8/tl was sync'ed up to jdk8-b106 (it had been at b104) last Friday 
and since then several of us have noticed significant slowdowns (20-30%) 
in the time is takes to run the jdk tests. The jdk tests run in agent VM 
mode that should mostly eliminate startup for most of the tests. As 
jdk8/tl is always ahead of jdk8/jdk8 with library changes then it means 
that the only interesting changes that the sync up brought in is the 
HotSpot changes.

I don't think anyone of has had the time to attempt to bisect this yet 
(or know if this is all or only some OS/arch) and this mail is just to 
see whether it rings any bells with anyone.


More information about the hotspot-dev mailing list