21.02.0.0

Introduces medium-term support (MTS) for Java Standard Edition 15. See Azul Product Support Lifecycle for more information.

Additional non-security changes associated with the January 2021 Patch Set Updates (PSU) OpenJDK 7u292, OpenJDK 8u282, OpenJDK 11.0.10, OpenJDK 13.0.6 and OpenJDK 15.0.2 release contents.

Load value barriers for reference equality checks are optimized within loops. Zing also optimizes more such checks aggressively by considering both operands of the equality check.

Improved object locking with better monitor inflation behavior.

The functionality of UseCodeCacheFlushing is offered under UseIncrementalCodeCacheFlushing in Zing 21.02.0.0. However, Zing has emergency code cache flushing turned on by default, see UseEmergencyCodeCacheFlushing in Using Zing Command-Line Options for details.

Early-access support for ReadyNow Image, an experimental warm-up optimizer based on ReadyNow and Linux Checkpoint/Restore In Userspace (CRIU).

Zing 21.02.0.0 installation contains ReadyNow Image files in the /etc/rni/ directory: ` `criu libnet.so.1 libnl-3.so.200 libprotobuf-c.so.1 restore-script wait-script

Zing 21.02.0.0 includes optional experimental support for interaction with connected runtime services through an emerging protocol in Zing 13. Note that for Zing 8 and Zing 11 this support was introduced in Zing 21.01.0.0.

Zing 21.02.0.0 installation contains the following files related to the services: