From f506e76b69f443eca88cf6801733bf76910ed0f1 Mon Sep 17 00:00:00 2001
From: Alexander Nozik <altavir@gmail.com>
Date: Fri, 26 Oct 2018 17:45:41 +0300
Subject: [PATCH] Moved JMH out of core

---
 kmath-core/build.gradle                       | 10 +---
 kmath-jmh/build.gradle                        | 15 ++++++
 .../kmath/structures/ArrayBenchmark.kt        | 53 +++++++++++++++++++
 settings.gradle                               |  1 +
 4 files changed, 71 insertions(+), 8 deletions(-)
 create mode 100644 kmath-jmh/build.gradle
 create mode 100644 kmath-jmh/src/jmh/kotlin/scientifik/kmath/structures/ArrayBenchmark.kt

diff --git a/kmath-core/build.gradle b/kmath-core/build.gradle
index 948dc87bf..18be067e6 100644
--- a/kmath-core/build.gradle
+++ b/kmath-core/build.gradle
@@ -1,6 +1,5 @@
 plugins {
-    id 'kotlin-multiplatform'// version '1.3.0-rc-116'
-    id "me.champeau.gradle.jmh" version "0.4.7"
+    id 'kotlin-multiplatform'
 }
 
 repositories {
@@ -8,14 +7,9 @@ repositories {
     mavenCentral()
 }
 
-dependencies{
-    jmh 'org.jetbrains.kotlin:kotlin-stdlib-jdk8'
-}
-
 kotlin {
     targets {
-        fromPreset(presets.jvmWithJava, 'jvm')
-        //fromPreset(presets.jvm, 'jvm')
+        fromPreset(presets.jvm, 'jvm')
         fromPreset(presets.js, 'js')
         // For ARM, preset should be changed to presets.iosArm32 or presets.iosArm64
         // For Linux, preset should be changed to e.g. presets.linuxX64
diff --git a/kmath-jmh/build.gradle b/kmath-jmh/build.gradle
new file mode 100644
index 000000000..a16bf3022
--- /dev/null
+++ b/kmath-jmh/build.gradle
@@ -0,0 +1,15 @@
+plugins {
+    id "java"
+    id "kotlin"
+    id "me.champeau.gradle.jmh" version "0.4.7"
+}
+
+repositories {
+    maven { url = 'http://dl.bintray.com/kotlin/kotlin-eap' }
+    mavenCentral()
+}
+
+dependencies {
+    implementation project(':kmath-core')
+    jmh 'org.jetbrains.kotlin:kotlin-stdlib-jdk8'
+}
\ No newline at end of file
diff --git a/kmath-jmh/src/jmh/kotlin/scientifik/kmath/structures/ArrayBenchmark.kt b/kmath-jmh/src/jmh/kotlin/scientifik/kmath/structures/ArrayBenchmark.kt
new file mode 100644
index 000000000..eb40195e0
--- /dev/null
+++ b/kmath-jmh/src/jmh/kotlin/scientifik/kmath/structures/ArrayBenchmark.kt
@@ -0,0 +1,53 @@
+package scientifik.kmath.structures
+
+import org.openjdk.jmh.annotations.*
+import java.nio.IntBuffer
+
+
+@Fork(1)
+@Warmup(iterations = 2)
+@Measurement(iterations = 5)
+@State(Scope.Benchmark)
+open class ArrayBenchmark {
+
+    lateinit var array: IntArray
+    lateinit var arrayBuffer: IntBuffer
+    lateinit var nativeBuffer: IntBuffer
+
+    @Setup
+    fun setup() {
+        array = IntArray(10000) { it }
+        arrayBuffer = IntBuffer.wrap(array)
+        nativeBuffer = IntBuffer.allocate(10000)
+        for (i in 0 until 10000) {
+            nativeBuffer.put(i,i)
+        }
+    }
+
+    @Benchmark
+    fun benchmarkArrayRead() {
+        var res = 0
+        for (i in 1..10000) {
+            res += array[10000 - i]
+        }
+        print(res)
+    }
+
+    @Benchmark
+    fun benchmarkBufferRead() {
+        var res = 0
+        for (i in 1..10000) {
+            res += arrayBuffer.get(10000 - i)
+        }
+        print(res)
+    }
+
+    @Benchmark
+    fun nativeBufferRead() {
+        var res = 0
+        for (i in 1..10000) {
+            res += nativeBuffer.get(10000 - i)
+        }
+        print(res)
+    }
+}
\ No newline at end of file
diff --git a/settings.gradle b/settings.gradle
index 03760221a..0e4b6fea7 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -10,4 +10,5 @@ enableFeaturePreview('GRADLE_METADATA')
 
 rootProject.name = 'kmath'
 include ':kmath-core'
+include ':kmath-jmh'