chore: change group id of jmh fork

[not-matthias]

No description provided.

[linear]

COD-2400 Change group ID of JMH fork

What?

We're currently reusing the org.openjdk.jmh group ID, which allows users to simply change the version and select ours:

plugins {
    java
    id("me.champeau.jmh") version "0.7.2"
}

jmh {
    jmhVersion.set("1.37.0-codspeed.1")
}

However, if we want to publish our fork on MavenCentral, this won't work as they require a unique group id. This means we'll have to rename org.openjdk.jmh to io.codspeed.jmh which will require further changes in the Users code/configuration.

For gradle, they'll have to substitute the package:

configurations.all {
    resolutionStrategy.dependencySubstitution {
        substitute(module("org.openjdk.jmh:jmh-core"))
            .using(module("io.codspeed.jmh:jmh-core:1.37.0-codspeed.1"))
        substitute(module("org.openjdk.jmh:jmh-generator-annprocess"))
            .using(module("io.codspeed.jmh:jmh-generator-annprocess:1.37.0-codspeed.1"))
    }
}

In Maven, we'd just have to replace the package name:

<dependency>
    <groupId>io.codspeed.jmh</groupId>  <!-- just change this -->
    <artifactId>jmh-core</artifactId>
    <version>1.37.0-codspeed.1</version>
</dependency>

How?

• Change group id to io.codspeed.jmh
• Remove -codspeed.1 version suffix
• Update docs (installation for maven/gradle)

[Copilot]

Pull request overview

This PR updates the repository’s forked JMH build/publish coordinates by moving it from org.openjdk.jmh to io.codspeed.jmh, and aligns the examples/composite-build wiring accordingly.

Changes:

• Change the JMH fork Maven/Gradle coordinates to groupId=io.codspeed.jmh and version=0.1.0.
• Add Gradle composite-build dependency substitution so requests for org.openjdk.jmh:* resolve to the included jmh-fork projects.
• Update Maven and Gradle examples plus contributor docs to reflect the new coordinates/versioning.

Reviewed changes

Copilot reviewed 25 out of 25 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
settings.gradle.kts	Adds composite-build substitutions to map org.openjdk.jmh modules to the included jmh-fork projects.
jmh-fork/pom.xml	Updates parent POM groupId/version to io.codspeed.jmh:0.1.0.
jmh-fork/jmh-samples/pom.xml	Updates parent/dependency groupId/version to io.codspeed.jmh:0.1.0.
jmh-fork/jmh-generator-reflection/pom.xml	Updates parent/dependency groupId/version to io.codspeed.jmh:0.1.0.
jmh-fork/jmh-generator-bytecode/pom.xml	Updates parent/dependency groupId/version to io.codspeed.jmh:0.1.0.
jmh-fork/jmh-generator-asm/pom.xml	Updates parent/dependency groupId/version to io.codspeed.jmh:0.1.0.
jmh-fork/jmh-generator-annprocess/pom.xml	Updates parent/dependency groupId/version to io.codspeed.jmh:0.1.0.
jmh-fork/jmh-core/pom.xml	Updates parent groupId/version to io.codspeed.jmh:0.1.0.
jmh-fork/jmh-core-it/pom.xml	Updates parent/dependency groupId/version to io.codspeed.jmh:0.1.0.
jmh-fork/jmh-core-ct/pom.xml	Updates parent/dependency groupId/version to io.codspeed.jmh:0.1.0.
jmh-fork/jmh-core-benchmarks/pom.xml	Updates parent/dependency groupId/version to io.codspeed.jmh:0.1.0.
jmh-fork/jmh-archetypes/pom.xml	Updates parent groupId/version to io.codspeed.jmh:0.1.0.
jmh-fork/jmh-archetypes/jmh-scala-benchmark-archetype/src/main/resources/archetype-resources/pom.xml	Updates archetype resource dependencies groupId to io.codspeed.jmh.
jmh-fork/jmh-archetypes/jmh-scala-benchmark-archetype/pom.xml	Updates parent groupId/version to io.codspeed.jmh:0.1.0.
jmh-fork/jmh-archetypes/jmh-kotlin-benchmark-archetype/src/main/resources/archetype-resources/pom.xml	Updates archetype resource dependencies groupId to io.codspeed.jmh.
jmh-fork/jmh-archetypes/jmh-kotlin-benchmark-archetype/pom.xml	Updates parent groupId/version to io.codspeed.jmh:0.1.0.
jmh-fork/jmh-archetypes/jmh-java-benchmark-archetype/src/main/resources/archetype-resources/pom.xml	Updates archetype resource dependencies groupId to io.codspeed.jmh.
jmh-fork/jmh-archetypes/jmh-java-benchmark-archetype/pom.xml	Updates parent groupId/version to io.codspeed.jmh:0.1.0.
jmh-fork/jmh-archetypes/jmh-groovy-benchmark-archetype/src/main/resources/archetype-resources/pom.xml	Updates archetype resource dependencies groupId to io.codspeed.jmh.
jmh-fork/jmh-archetypes/jmh-groovy-benchmark-archetype/pom.xml	Updates parent groupId/version to io.codspeed.jmh:0.1.0.
jmh-fork/build.gradle.kts	Updates Gradle-published coordinates to io.codspeed.jmh:0.1.0.
examples/example-maven/pom.xml	Updates example dependencies and property to io.codspeed.jmh:0.1.0.
examples/example-gradle/build.gradle.kts	Updates the configured JMH version to 0.1.0.
CONTRIBUTING.md	Updates version-bump guidance to the new groupId/versioning scheme.
AGENTS.md	Updates publishing/versioning guidance to the new groupId/versioning scheme.

Comments suppressed due to low confidence (2)

AGENTS.md:80

• AGENTS.md says to update the version reference in root build.gradle.kts, but the root build.gradle.kts currently has no JMH version reference. The version is set in jmh-fork/build.gradle.kts and in the example projects (e.g. examples/example-gradle/build.gradle.kts and examples/example-maven/pom.xml), so the docs should point to the right files.

Then update the version reference in root `build.gradle.kts`.

CONTRIBUTING.md:12

• CONTRIBUTING.md says to update the version reference in build.gradle.kts, but there is no JMH version reference in the root build.gradle.kts. This should reference jmh-fork/build.gradle.kts (and the example build files that pin the JMH version) to avoid contributors updating the wrong place.

This updates all pom.xml files in the multi-module project. After bumping, also update the version reference in build.gradle.kts.

</details>



---

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[codspeed-hq]

Merging this PR will degrade performance by 26.8%

⚡ 33 improved benchmarks
❌ 11 regressed benchmarks
✅ 706 untouched benchmarks
⏩ 9 skipped benchmarks¹

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
⚡	generateCombinations[6]_semeru	11.4 µs	9 µs	+26.41%
⚡	findHighestSetBit[0]_semeru	11 ns	8 ns	+37.5%
⚡	coinChange[50]_semeru	1,043 ns	863 ns	+20.86%
⚡	coinChange[200]_semeru	4.1 µs	3.5 µs	+16.68%
⚡	coinChange[100]_semeru	2 µs	1.7 µs	+17.55%
⚡	fibonacciMemo[10]_semeru	32 ns	28 ns	+14.29%
❌	subsetSum[10]_semeru	426 ns	495 ns	-13.94%
⚡	shellSort[10000]_semeru	3.2 ms	2.7 ms	+19.27%
⚡	shellSort[100]_semeru	11 µs	8.1 µs	+36.55%
⚡	shellSort[1000]_semeru	189.5 µs	166.3 µs	+13.95%
⚡	grayToBinary[65535]_microsoft	31 ns	26 ns	+19.23%
⚡	grayToBinary[1024]_microsoft	26 ns	20 ns	+30%
⚡	permutations[3]_microsoft	641 ns	556 ns	+15.29%
⚡	grayToBinary[42]_microsoft	18 ns	16 ns	+12.5%
⚡	grayToBinary[255]_microsoft	24 ns	17 ns	+41.18%
⚡	backtrackHeavy[20]_microsoft	16.9 µs	14.7 µs	+15.17%
⚡	backtrackHeavy[24]_microsoft	23.3 µs	20.1 µs	+16.4%
❌	multiPatternScan[24]_microsoft	5.9 ms	6.6 ms	-10.71%
❌	dualPivotQuickSort[10000]_microsoft	4.7 ms	5.9 ms	-20.21%
⚡	fibonacciBottomUp[30]_oracle	2.5 µs	2.2 µs	+15.56%
...	...	...	...	...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.

---

_{Comparing cod-2400-change-group-id-of-jmh-fork (c559c2b) with cod-2309-walltime-benchmarks-with-flamegraphs (eea523f)}

Footnotes

1. 9 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[GuillaumeLagrange]

lgtm, I have read everything very thoroughly