RFR: 8202548: Use reservation Object when creating SpeciesData

[Paul Sandoz]

+1 this is better.

Paul.

> On May 2, 2018, at 6:54 AM, Claes Redestad <claes.redestad at oracle.com> wrote:
> 
> Hi,
> 
> a small follow-up to JDK-8202184 in line with Peter Levart's suggestion, where we can avoid
> instantiating two different SpeciesData objects, and should avoid creating an instance of
> the Function on each lookup:
> 
> Webrev: http://cr.openjdk.java.net/~redestad/8202548/open.00/
> Bug: https://bugs.openjdk.java.net/browse/JDK-8202548
> 
> This is a small micro-optimization, as well as granting more freedom to future newSpeciesData
> implementations.
> 
> Thanks!
> 
> /Claes