GROOVY-10307: backport JMH benchmarks from master to Groovy 4

[jamesfredley]

Summary

Backport JMH benchmarks for invokedynamic performance patterns and Grails-like workload simulations from master to the GROOVY_4_0_X branch, enabling performance comparison testing on Groovy 4.

Changes

New JMH benchmarks (16 files)

Core Groovy performance (org.apache.groovy.perf):

• ClosureBench - closure creation, reuse, capture, delegation, nesting, currying, composition, trampoline, collection operations
• GStringBench - GString interpolation, concatenation, lazy evaluation
• GroovyIdiomBench - Groovy idioms (safe navigation, elvis, spread, with/tap, destructuring)
• LoopsBench - for/while/each/times/upto loop patterns
• MetaclassBench - dynamic method dispatch overhead with metaclass changes
• MethodInvocationBench - method dispatch (instance, static, overloaded, polymorphic, interface, dynamic)
• OperatorBench - operator overloading, comparisons, range operations
• PropertyAccessBench - property get/set patterns (direct, dynamic, nested)
• RunnerRegistryBench - GroovyRunnerRegistry iterator performance

Grails-like patterns (org.apache.groovy.perf.grails):

• CallSiteInvalidationBench - SwitchPoint invalidation overhead for cross-type and same-type metaclass changes
• CategoryBench - category usage patterns (single, nested, simultaneous, shadowing)
• DynamicDispatchBench - methodMissing, propertyMissing, invokeMethod, ExpandoMetaClass injection
• GrailsLikePatternsBench - composite patterns (service chains, controller actions, domain validation, config DSL, markup builder, full request cycle)
• GrailsWorkloadBench - collection closure chains, spread operator, nested closure delegation, GString interpolation, project metrics aggregation
• MetaclassChangeBench - metaclass modification impact (expando additions, replacements, multi-class cascade, burst/steady-state, closure dispatch)
• MetaclassVariationBench - per-instance ExpandoMetaClass overhead (GORM domain class enhancement pattern)

Build changes

• Updated org.apache.groovy-performance.gradle to support indy property for toggling invokedynamic mode in JMH compilation (-Pindy=true|false, defaults to true)
• Added jmh task input tracking and jmhJar output configuration

CI workflows

• groovy-jmh.yml - runs JMH benchmarks with invokedynamic enabled (matrix: bench, core, grails suites)
• groovy-jmh-classic.yml - runs JMH benchmarks with classic (non-indy) bytecode

Groovy 4 compatibility adaptation

• DynamicDispatchBench: moved DynamicFinder, DynamicProperties, and MethodInterceptor from static inner classes to package-level classes because Groovy 4 does not support methodMissing/propertyMissing on static inner classes

Verification

• Compiled successfully with ./gradlew :performance:jmhClasses (indy mode)
• Compiled successfully with ./gradlew :performance:jmhClasses -Pindy=false (classic mode)

[Copilot]

Pull request overview

This PR backports a set of JMH microbenchmarks from master into the Groovy 4 branch to enable performance comparison testing, including Grails-like metaprogramming and invokedynamic invalidation scenarios, plus supporting build/CI wiring.

Changes:

• Adds new JMH benchmark suites under org.apache.groovy.perf and org.apache.groovy.perf.grails covering closures, GStrings, operators, method/property dispatch, metaclass churn, categories, and workload simulations.
• Updates performance Gradle build logic to allow toggling Groovy indy compilation via -Pindy=... and improves task input/output tracking.
• Introduces CI workflows to run JMH in indy and “classic” (non-indy) modes across benchmark suites.

Reviewed changes

Copilot reviewed 19 out of 19 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/grails/MetaclassVariationBench.groovy	New benchmark for per-instance EMC overhead and cross-type churn scenarios.
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/grails/MetaclassChangeBench.groovy	New benchmark suite focusing on metaclass modification impact on indy call sites.
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/grails/GrailsWorkloadBench.groovy	New workload-style benchmarks based on Grails-like collection/DSL patterns.
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/grails/GrailsLikePatternsBench.groovy	Composite Grails-like request/service/domain/builder patterns.
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/grails/DynamicDispatchBench.groovy	Benchmarks for methodMissing/propertyMissing/invokeMethod/Expando injection dispatch.
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/grails/CategoryBench.groovy	Category usage benchmarks measuring invalidation overhead patterns.
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/grails/CallSiteInvalidationBench.groovy	Focused SwitchPoint invalidation benchmarks (same-/cross-type).
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/RunnerRegistryBench.java	New benchmark for GroovyRunnerRegistry iterator performance.
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/PropertyAccessBench.groovy	Property access microbenchmarks (fields/getters/maps/chaining).
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/OperatorBench.groovy	Operator dispatch microbenchmarks (arithmetic, subscripts, comparisons, etc.).
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/MethodInvocationBench.groovy	Method invocation microbenchmarks (overloads, polymorphism, def-typed).
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/MetaclassBench.groovy	Benchmarks for call dispatch under ongoing metaclass changes.
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/LoopsBench.groovy	Loop pattern benchmarks (each vs method call vs closure reuse, etc.).
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/GroovyIdiomBench.groovy	Groovy idiom benchmarks (safe nav, spread-dot, elvis, with/tap, ranges, as).
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/GStringBench.groovy	GString interpolation/concat/toString benchmarks.
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/ClosureBench.groovy	Closure creation/reuse/currying/composition/trampoline/collection operation benchmarks.
build-logic/src/main/groovy/org.apache.groovy-performance.gradle	Adds -Pindy toggle and improves JMH task inputs/outputs.
.github/workflows/groovy-jmh.yml	New CI workflow to run JMH suites with indy enabled.
.github/workflows/groovy-jmh-classic.yml	New CI workflow to run JMH suites with indy disabled.

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