On Tue, 31 Jan 2023 15:57:43 GMT, Per Minborg <[email protected]> wrote:
> `ZoneOffset` instances are cached by the `ZoneOffset` class itself for values > in the range [-18h, 18h] for each second that is on an even quarter of an > hour (i.e. at most 2*18*4+1 = 145 values). > > Instead of using a `ConcurrentHashMap` for caching instanced, we could > instead use an `AtomicReferenceArray` with direct slot value access for said > even seconds. This will improve performance and reduce the number of object > even though the backing array will go from an initial 32 in the CHM to an > initial/final 145 in the ARA. The CHM will contain much more objects and > array slots for typical numbers of entries in the cache and will compute > hash/bucket/collision on the hot code path for each cache access. This pull request has been closed without being integrated. ------------- PR: https://git.openjdk.org/jdk/pull/12346
