System.identityHashCode performance

Ulf Zibis Ulf.Zibis at
Tue Sep 22 11:42:17 UTC 2009

Janda, you could provide a/the patch to force the fix of this bug.


Am 22.09.2009 13:35, Tom Hawtin schrieb:
> 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...
> Tom Hawtin

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