The vector API is designed to specific vector communications that reliably compile at runtime to optimum vector directions on supported CPU architectures, thus attaining efficiency superior to equal scalar computations. The vector API beforehand was incubated in JDK 16 by JDK 23. Objectives of the proposal embody clearly and concisely expressing a variety of vector computations in an API that’s platform-agnostic, that provides dependable runtime compilation and efficiency on x64 and AArch54 architectures, that degrades gracefully and nonetheless capabilities when a vector computation can’t be expressed at runtime, and that aligns with Challenge Valhalla, leveraging enhancements to the Java object mannequin.
The class-file API, beforehand previewed in JDK 22 and JDK 23, can be finalized in JDK 24, with minor adjustments. This API offers a normal API for parsing, producing, and remodeling Java class recordsdata. It goals to supply an API for processing class recordsdata that tracks the category file format outlined by the Java Digital Machine specification. A second aim is to allow JDK parts emigrate to the usual API, and ultimately take away the JDK’s inner copy of the third-party ASM library. Adjustments because the second preview embody a renaming of enum values, removing of some fields, the addition of strategies and technique overloads, strategies renamed, and removing of interfaces and strategies deemed pointless.
Late barrier growth for the G1 rubbish collector is meant to simplify the implementation of G1’s boundaries by shifting their growth from early within the C2 compilation pipeline to later. The boundaries report details about software reminiscence accesses. Objectives embody decreasing the execution time of C2 compilation when utilizing the G1 collector, making G1 boundaries understandable to HotSpot builders who lack a deep understanding of C2, and guaranteeing that C2 preserves invariants concerning the relative ordering of reminiscence accesses, safepoints, and boundaries. A fourth function is preserving the standard of C2-generated JIT (just-in-time)-compiled code, when it comes to pace and measurement.
