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Brian Clozel 67547e61c6 Add JMH benchmark infrastructure

Prior to this commit, the Spring Framework test suite would rely only on
"Performance" tests associated with a specific CI build. As outlined in
gh-24830, the way they're built and executed is not working well
anymore.

This commit introduces a new JMH benchmark infrastructure in the build.
The goal here is not to run those benchmarks as part of a CI build, but
rather provide a proper infrastructure for writing and locally running
micro-benchmarks when working on specific optimizations.

This commit adds and configures a Gradle JMH plugin to allow for JMH
benchmark classes in Spring Framework modules (in `src/jmh/java` of each
`spring-*` module). It's also relaxing the checkstyle rules for JMH
classes, especially around Javadoc rules: this code is not meant to
have Javadocs.

Finally, this commit links to a new Wiki page on the project GitHub
repository documenting the infrastructure and helping contributors to
run and design benchmarks.

See gh-24830

2020-05-13 21:29:02 +02:00

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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.

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