> On the performance side, I noted two interesting improvements:

> HashMap.putAll() now has a fast-path when the Map is a HashMap, which directly calls putHashMapEntries(), resulting in a 66-86% improvement (PR #28243);

> A new intrinsic for the AVX2 architecture has been added for binary search, resulting in a 1.5x to 2.35x improvement for arrays above a certain threshold (int=256, long=768, short=512, char=512) (PR #30612).

Ok THIS is impressive!