RFR(XS): 8229407: Avoid ConcurrentHashMap resizes during bootstrap

[Alan Bateman]

On 12/08/2019 11:13, Claes Redestad wrote:
> Hi core-libs,
>
> analysis shows that a handful of small ConcurrentHashMaps used during
> bootstrap is subject to some amount of resizing. Initializing these to
> slightly larger values improves startup metrics measurably on default
> images without regressing performance on minimal images.
>
> Bug:    https://bugs.openjdk.java.net/browse/JDK-8229407
> Webrev: http://cr.openjdk.java.net/~redestad/8229407/webrev.00/
This looks okay.

-Alan