ConcurrentLinkedHashMap --> Caffeine when Java-8 based

[ben-manes]

When transitioning to requiring Java 8, please upgrade to Caffeine. The performance should be relatively the same and the per-instance memory usage should be smaller.

ConcurrentLinkedHashMap changes will continue to be minimal, even more so now, and driven by requests from Java 6 users unable to upgrade. Caffeine is ideally the upgrade path for Guava cache users too, which due to Android cannot be significantly modified.

[ukclivecox]

Thanks for the info. Certainly be good to test Caffeine as a replacement and see if it helps in load tests when we move to Java 8.

[ben-manes]

If you upgrade from 1.2 to 1.4.2 you'll have much better cache performance, about the same as Caffeine. From there the benefit of upgrading will be better memory management and many more features.

[seldondev]

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