RFR(s): 8156079: make empty instances singletons

[Claes Redestad]

+1

/Claes

On 2016-11-04 03:08, 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/
>
> Thanks,
>
> s'marks