[K/N] Add concurrent version of Splay benchmark

kotlin-native/performance/ring/src/main/kotlin/main.kt

@@ -61,6 +61,7 @@ class RingLauncher : Launcher() {
                     "Richards" to BenchmarkEntryWithInit.create(::RichardsBenchmark, { runRichards() }),
                     "Singleton.access" to BenchmarkEntryWithInit.create(::SingletonBenchmark, { access() }),
                     "Splay" to BenchmarkEntryWithInitAndValidation.create(::SplayBenchmark, { runSplay() }, { splayTearDown() }),
+                    "SplayWithWorkers" to BenchmarkEntryWithInitAndValidation.create(::SplayBenchmarkUsingWorkers, { runSplayWorkers() }, { splayTearDownWorkers() }),
                     "String.stringConcat" to BenchmarkEntryWithInit.create(::StringBenchmark, { stringConcat() }),
                     "String.stringBuilderConcat" to BenchmarkEntryWithInit.create(::StringBenchmark, { stringBuilderConcat() }),
                     "String.stringBuilderConcatNullable" to BenchmarkEntryWithInit.create(::StringBenchmark, { stringBuilderConcatNullable() }),
@@ -229,6 +230,13 @@ class RingLauncher : Launcher() {
                     "LocalObjects.localArray" to BenchmarkEntryWithInit.create(::LocalObjectsBenchmark, { localArray() }),
                     "ComplexArrays.outerProduct" to BenchmarkEntryWithInit.create(::ComplexArraysBenchmark, { outerProduct() }),
             )
+
+    init {
+        @OptIn(kotlin.ExperimentalStdlibApi::class)
+        if (!isExperimentalMM()) {
+            baseBenchmarksSet -= listOf("SplayWithWorkers")
+        }
+    }
 }
 
 fun main(args: Array<String>) {

kotlin-native/performance/ring/src/main/kotlin/org/jetbrains/ring/SplayBenchmark.kt

@@ -41,6 +41,7 @@
 // also has to deal with a lot of changes to the large tree object
 // graph.
 
+import kotlin.native.concurrent.*
 import kotlin.random.Random
 
 // A splay tree is a self-balancing binary search tree with the additional
@@ -301,3 +302,20 @@ class SplayBenchmark {
         }
     }
 }
+
+class SplayBenchmarkUsingWorkers {
+    val numberOfWorkers = 5;
+    val workers = Array(numberOfWorkers, { _ -> Worker.start() })
+    val splayTrees = Array(numberOfWorkers, { _ -> SplayBenchmark() });
+
+    fun runSplayWorkers() {
+        val futures = Array(numberOfWorkers) {i -> workers[i].execute(TransferMode.SAFE, { splayTrees[i] }, {it.runSplay()})};
+        futures.forEach{it.consume {}};
+    }
+
+    fun splayTearDownWorkers() {
+        val futures = Array(numberOfWorkers) {i -> workers[i].execute(TransferMode.SAFE, { splayTrees[i] }, {it.splayTearDown()})};
+        futures.forEach{it.consume {}};
+        workers.forEach { it.requestTermination().result }
+    }
+}