SpringBoot Enhancement: Concurrentreferencehashmap implementation, using segment lock instead of CAS

The spring version is 2.3.7 I use this class, as the cache layer, we have very little data, but read and write frequently, data is acceptable to lose, so I use this class, but I find that this class still uses JDK 1.7's fragmentation lock implementation scheme, not 1.8's CAS implementation scheme.

Comment From: wilkinsona

Thanks for the suggestion. ConcurrentReferenceHashMap is part of Spring Framework.