RFR(s): 8156079: make empty instances singletons

[Alan Bateman]

On 04/11/2016 02:08, Stuart Marks wrote:

> Hi all,
>
> Please review this small set of changes to the immutable collections 
> to make the zero-size instances singletons. (JDK-8156079)
>
> This also includes a couple other small optimizations (JDK-8169222) to 
> change the expansion factor from floating point to integer, and also 
> to avoid creating a single-use Random instance to compute the hash 
> salt value at startup.
>
> Webrev:
>
>     http://cr.openjdk.java.net/~smarks/reviews/8156079/webrev.0/
This looks good (I find myself using these a lot lately, really nice to 
use).

-Alan