заготовка для второго семинара

.gitignore

@@ -3,3 +3,5 @@ _site
 .jekyll-metadata
 vendor
 .bundle
+target
+.idea

code/seminar1/project/build.properties

@@ -0,0 +1 @@
+sbt.version = 1.3.7

code/seminar2/build.sbt

@@ -0,0 +1,7 @@
+name := "seminar2"
+
+version := "0.1"
+
+scalaVersion := "2.13.1"
+
+enablePlugins(JmhPlugin)

code/seminar2/project/build.properties

@@ -0,0 +1 @@
+sbt.version = 1.3.7

code/seminar2/project/plugins.sbt

@@ -0,0 +1 @@
+addSbtPlugin("pl.project13.scala" % "sbt-jmh" % "0.3.7")

code/seminar2/src/main/scala/benchmarks/CollectionBenchmarks.scala

@@ -0,0 +1,24 @@
+package benchmarks
+
+import java.util.concurrent.TimeUnit
+
+import org.openjdk.jmh.annotations._
+
+import scala.util.Random
+
+// sbt
+// jmh:run -f 1 -i 1
+@OutputTimeUnit(TimeUnit.MILLISECONDS)
+@BenchmarkMode(Array(Mode.Throughput))
+class CollectionBenchmarks {
+  @Benchmark
+  def listAppend(scope: BenchmarkState) = scope.randomList :+ 1
+
+  @Benchmark
+  def listPrepend(scope: BenchmarkState) = 1 +: scope.randomList
+}
+
+@State(Scope.Benchmark)
+class BenchmarkState {
+  val randomList: List[Int] = List.fill(10000)(Random.nextInt())
+}