System.identityHashCode performance

[Tom Hawtin]

Janda Martin wrote:
> I would like to ask about any plans of speed improvements to "System.identityHashCode" or "IdentityHashMap"
> 
> I use EclipseLink and it uses IdentityHashMap for storing entities and their clones.
> 
> In my case System.identityHashCode consumes 54% of time during insert data to database. There are lots of other project using IdentityHashMap and identityHashCode.

CR 6378256 seems to cover this for the client/C1 compiler. Presumably 
the server/C2 compiler already intrinsifies the method. It's been in 
"fix understood" for a couple of years...

http://bugs.sun.com/view_bug.do?bug_id=6378256

Tom Hawtin