build: Migrate from kotlinx-benchmark to jmh-gradle

This change updates the project to use jmh-gradle for benchmarking as
opposed to kotlinx-benchmark. Both plugins use JMH under the hood, but
jmh-gradle offers more options for profiling and seems to be beter
maintained.

2 files changed, 6 insertions, 34 deletions

diff --git a/buildSrc/build.gradle.kts b/buildSrc/build.gradle.kts
index a5e99bfa..4eb8ac31 100644
--- a/buildSrc/build.gradle.kts
+++ b/buildSrc/build.gradle.kts
@@ -34,7 +34,7 @@ dependencies {
     implementation(kotlin("gradle-plugin", version = "1.5.30"))
     implementation("org.jlleitschuh.gradle:ktlint-gradle:10.1.0")
     implementation("org.jetbrains.kotlin:kotlin-allopen:1.5.30")
-    implementation("org.jetbrains.kotlinx:kotlinx-benchmark-plugin:0.3.1")
+    implementation("me.champeau.jmh:jmh-gradle-plugin:0.6.6")
     implementation("org.jetbrains.dokka:dokka-gradle-plugin:1.5.0")
     implementation("gradle.plugin.com.github.jengelman.gradle.plugins:shadow:7.0.0")
 }
diff --git a/buildSrc/src/main/kotlin/benchmark-conventions.gradle.kts b/buildSrc/src/main/kotlin/benchmark-conventions.gradle.kts
index 590f51cf..65608e8f 100644
--- a/buildSrc/src/main/kotlin/benchmark-conventions.gradle.kts
+++ b/buildSrc/src/main/kotlin/benchmark-conventions.gradle.kts
@@ -20,49 +20,21 @@
  * SOFTWARE.
  */
 
-import kotlinx.benchmark.gradle.*
 import org.jetbrains.kotlin.allopen.gradle.*
 
 plugins {
-    id("org.jetbrains.kotlinx.benchmark")
     `java-library`
     kotlin("plugin.allopen")
-}
-
-sourceSets {
-    register("jmh") {
-        compileClasspath += sourceSets["main"].output
-        runtimeClasspath += sourceSets["main"].output
-    }
-}
-
-configurations {
-    named("jmhImplementation") {
-        extendsFrom(configurations["implementation"])
-    }
+    id("me.champeau.jmh")
 }
 
 configure<AllOpenExtension> {
     annotation("org.openjdk.jmh.annotations.State")
 }
 
-benchmark {
-    targets {
-        register("jmh") {
-            this as JvmBenchmarkTarget
-            jmhVersion = "1.33"
-        }
-    }
-}
-
-dependencies {
-    val libs = Libs(project)
-    implementation(libs["kotlinx.benchmark.runtime.jvm"])
-}
+jmh {
+    jmhVersion.set("1.33")
 
-// Workaround for https://github.com/Kotlin/kotlinx-benchmark/issues/39
-afterEvaluate {
-    tasks.named<org.gradle.jvm.tasks.Jar>("jmhBenchmarkJar") {
-        duplicatesStrategy = DuplicatesStrategy.EXCLUDE
-    }
+    profilers.add("stack")
+    profilers.add("gc")
 }