forEach on HashMap and IdentityHashMap, Re: Loose ends inventory

Paul Sandoz paul.sandoz at
Wed Jun 12 01:04:40 PDT 2013

On Jun 11, 2013, at 6:34 PM, Remi Forax <forax at> wrote:

> It was not listed in Brian list, but we should provide an implementation of forEach for HashMap that avoid to create an Iterator,
> HashMap is too common to not have it's dedicated implementation
> (ArrayList by example has its own implementation of forEach).
> There is also another implementation that should have a specific implementation IdentityHashMap because
> entrySet() creates map entries on the fly so having a specific implementation that will not allocatin entries will improve performance
> (a lot for big identity hashmap).

Also perhaps ConcurrentHashMap.

I logged a bug to track this. 


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