Kotlin benches

bench/bench_kotlin/README.md

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+
+ ## Run benchmarks
+
+ ```shell
+./gradlew bench
+ ```
+
+ ## Results of benchmarking
+
+Note: Warm-up=10 and Iteration=5
+
+ ```
+Benchmark               Mode  Cnt     Score      Error  Units
+TestFloat.all          thrpt   15  3119.965 ±  787.947  ops/s
+TestRational.all       thrpt   15  7264.325 ± 2229.145  ops/s
+TestTrigoFloat.all     thrpt   15   324.178 ±   58.267  ops/s
+TestTrigoRational.all  thrpt   15     0.548 ±    0.015  ops/s
+ ```

bench/bench_kotlin/build.gradle.kts

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+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+plugins {
+    kotlin("jvm") version "1.7.20"
+    id("org.jetbrains.kotlinx.benchmark") version "0.4.5"
+}
+
+group = "math"
+version = "1.0-SNAPSHOT"
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testImplementation(kotlin("test"))
+    implementation("org.jetbrains.kotlinx:kotlinx-benchmark-runtime:0.4.5")
+    implementation("org.jetbrains.kotlinx:kotlinx-benchmark-runtime-jvm:0.4.5")
+}
+
+tasks.test {
+    useJUnitPlatform()
+}
+
+tasks.withType<KotlinCompile> {
+    kotlinOptions.jvmTarget = "1.8"
+}
+
+benchmark {
+    configurations {
+        named("main") {
+            iterations = 5 // number of iterations
+            iterationTime = 300
+            iterationTimeUnit = "ns"
+            warmups = 10
+            advanced("jvmForks", 3)
+        }
+    }
+    targets {
+        register("test")
+    }
+}

bench/bench_kotlin/gradle.properties

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+kotlin.code.style=official

bench/bench_kotlin/gradle/wrapper/gradle-wrapper.properties

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+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.4.2-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists