CI: run JMH benchmark

.gitlab-ci.yml

@@ -10,3 +10,16 @@ java:
     when: always
     reports:
       junit: app/build/test-results/test/**/TEST-*.xml
+    expire_in: 6 month
+
+jmh:
+  image: alpine:latest
+  stage: test
+  script:
+    - apk --no-cache add openjdk23 gradle --repository=https://dl-cdn.alpinelinux.org/alpine/edge/testing/
+    - gradle jmh --no-daemon
+  # https://docs.gitlab.com/ee/ci/jobs/job_artifacts.html
+  artifacts:
+    paths:
+      - app/build/reports/jmh/*
+    expire_in: 6 month

app/build.gradle.kts

@@ -97,9 +97,9 @@ jmh {
     forceGC = true
 
     // If human output is saved, it won't be written to stdout while running the benchmark!
-    //humanOutputFile = project.file("${project.layout.buildDirectory.get()}/reports/jmh/human.txt")
+    humanOutputFile = project.file("${project.layout.buildDirectory.get()}/reports/jmh/human.txt")
 
-    resultsFile = project.file("${project.layout.buildDirectory.get()}/reports/jmh/results.txt")
+    resultsFile = project.file("${project.layout.buildDirectory.get()}/reports/jmh/results.csv")
     resultFormat = "CSV"
 
     excludes = listOf(