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

Claes Redestad claes.redestad at oracle.com
Mon Aug 12 10:13:01 UTC 2019

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/



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