Try gradle build speedup

build.gradle

@@ -357,6 +357,9 @@ tasks.register('generateCitaviSource', XjcTask) {
 
 tasks.withType(JavaCompile).configureEach {
     options.encoding = 'UTF-8'
+
+    // hint by https://docs.gradle.org/current/userguide/performance.html#run_the_compiler_as_a_separate_process
+    options.fork = true
 }
 
 compileJava {

gradle.properties

@@ -1,2 +1,12 @@
 org.gradle.vs.watch=true
+
+# hint by https://docs.gradle.org/current/userguide/performance.html#increase_the_heap_size
 org.gradle.jvmargs=-Xmx4096M
+
+# hint by https://docs.gradle.org/current/userguide/performance.html#enable_configuration_cache
+# Does not work:
+# - Task `:compileJava` of type `org.gradle.api.tasks.compile.JavaCompile`: cannot serialize object of type 'org.gradle.api.internal.project.DefaultProject', a subtype of 'org.gradle.api.Project', as these are not supported with the configuration cache.
+# org.gradle.configuration-cache=false
+
+# hint by https://docs.gradle.org/current/userguide/performance.html#enable_the_build_cache
+org.gradle.caching=true