GROOVY-10307: add JMH benchmarks for invokedynamic performance patterns

[jamesfredley]

https://issues.apache.org/jira/browse/GROOVY-10307

Adds 7 JMH benchmark files to the performance subproject covering common Groovy patterns exercised through invokedynamic. These benchmarks complement the existing org.apache.groovy.bench suite (Ackermann, Ary, Fibo, GeneratedHashCode, Callsite) by focusing on Groovy-specific language features.

Run with: ./gradlew perf:jmh -PbenchInclude=perf

Benchmark Files

File	Benchmarks	Coverage
ClosureBench	19	Creation, reuse, multi-param, capture, delegation, nesting, method-ref, curry/rcurry, composition, spread, trampoline, each/collect/findAll/inject
LoopsBench	5	Closure-in-loop vs method-in-loop, nested iteration, call site caching
MethodInvocationBench	9	Instance, static, parameterized, overloaded, monomorphic/polymorphic call sites, interface dispatch, dynamic-typed
GStringBench	5	Simple/multi-value interpolation, string-concat baseline, map-key usage, repeated toString
PropertyAccessBench	6	Field read/write, getter/setter, dynamic-typed, map bracket/dot-property, chained access
OperatorBench	13	Arithmetic, BigDecimal, string multiply, list/map getAt/putAt, left-shift, equals, spaceship, comparison, unary minus, in-operator
GroovyIdiomBench	17	Safe navigation (?.), spread-dot (*.), elvis (?:), with/tap, range creation/iteration/contains, as-coercion

74 benchmarks total, all using proper Blackhole consumption to prevent dead-code elimination.

[Copilot]

Pull request overview

Adds a new org.apache.groovy.perf JMH benchmark suite under the performance subproject to measure invokedynamic-heavy Groovy language patterns (closures, operators, property access, GStrings, etc.), complementing the existing org.apache.groovy.bench benchmarks.

Changes:

• Add 7 new Groovy JMH benchmark classes under subprojects/performance/src/jmh/groovy/org/apache/groovy/perf.
• Cover Groovy-specific invokedynamic patterns: closure usage, loop/dispatch patterns, method invocation shapes, GString usage, property access styles, operator overloading, and common Groovy idioms.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/ClosureBench.groovy	Adds closure-focused microbenchmarks (creation, reuse, delegation, curry, trampoline, collection ops).
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/GStringBench.groovy	Adds GString interpolation/toString/map-key usage benchmarks.
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/GroovyIdiomBench.groovy	Adds benchmarks for Groovy idioms (safe-nav, spread-dot, elvis, with/tap, ranges, as coercion).
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/LoopsBench.groovy	Adds loop-centric benchmarks comparing closure-in-loop vs method calls and nested iteration patterns.
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/MethodInvocationBench.groovy	Adds benchmarks for method call shapes (instance/static, overload resolution, mono/poly call sites, interface dispatch, dynamic receiver).
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/OperatorBench.groovy	Adds operator-overloading benchmarks (arithmetic, BigDecimal, list/map subscripts, leftShift, equals, spaceship, comparisons, unary minus, in).
subprojects/performance/src/jmh/groovy/org/apache/groovy/perf/PropertyAccessBench.groovy	Adds benchmarks for property/field/getter-setter access, dynamic receiver property access, map bracket/dot property, and chaining.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 66.7163%. Comparing base (9b4ec31) to head (b86daf9).

Additional details and impacted files

@@                Coverage Diff                 @@
##               master      #2381        +/-   ##
==================================================
+ Coverage     66.7154%   66.7163%   +0.0009%     
- Complexity      29846      29847         +1     
==================================================
  Files            1382       1382                
  Lines          116180     116180                
  Branches        20491      20491                
==================================================
+ Hits            77510      77511         +1     
  Misses          32323      32323                
+ Partials         6347       6346         -1     

see 1 file with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[paulk-asert]

LGTM