RFR: [6904367]: (coll) IdentityHashMap is resized before exceeding the expected maximum size

[Martin Buchholz]

On Mon, Jul 7, 2014 at 9:41 AM, Martin Buchholz <martinrb at google.com> wrote:

> I'd like to offer an alternative version of this change.  webrev coming
> soon.
>

Here's the promised webrev.

http://cr.openjdk.java.net/~martin/webrevs/openjdk9/IdentityHashMap-capacity/

- Fixes a typo in the javadoc.
- removes the "threshold" field (WAT, a cache to avoid multiplying by 3?)
- optimizes 3*x into x + x << 1
- adds more test assertions
- removes the unusual 4/3 slack space for expansion on deserialization.

TODO: the test should be testng-ified, I think.