4a555aaef1
Prior to this commit, the `ConcurrentLruCache` implementation would use arrays of `AtomicReference` as operation buffers, and the buffer count would be calculated with the nearest power of two for the CPU count. This can result in significant heap memory usage as each `AtomicReference` buffer entry adds to the memory pressure. As seen in FasterXML/jackson-databind#3665, this can add a significant overhead for no real added benefit for the current use case. This commit changes the current implementation to use `AtomicReferenceArray` as buffers and reduce the number of buffers. JMH benchmarks results are within the error margin so we can assume that this does not change the performance characteristics for the typical use case in Spring Framework. Fixes gh-29520
Spring Framework 
This is the home of the Spring Framework: the foundation for all Spring projects. Collectively the Spring Framework and the family of Spring projects are often referred to simply as "Spring".
Spring provides everything required beyond the Java programming language for creating enterprise applications for a wide range of scenarios and architectures. Please read the Overview section as reference for a more complete introduction.
Code of Conduct
This project is governed by the Spring Code of Conduct. By participating, you are expected to uphold this code of conduct. Please report unacceptable behavior to spring-code-of-conduct@pivotal.io.
Access to Binaries
For access to artifacts or a distribution zip, see the Spring Framework Artifacts wiki page.
Documentation
The Spring Framework maintains reference documentation (published and source), GitHub wiki pages, and an API reference. There are also guides and tutorials across Spring projects.
Micro-Benchmarks
See the Micro-Benchmarks wiki page.
Build from Source
See the Build from Source wiki page and the CONTRIBUTING.md file.
Continuous Integration Builds
Information regarding CI builds can be found in the Spring Framework Concourse pipeline documentation.
Stay in Touch
Follow @SpringCentral, @SpringFramework, and its team members on Twitter. In-depth articles can be found at The Spring Blog, and releases are announced via our news feed.
License
The Spring Framework is released under version 2.0 of the Apache License.