Add Collection Conversion example from lecture 3

src/main/scala/lecture3/02_Conversion.scala

+package lecture3
+
+import scala.collection._
+import scala.collection.parallel.CollectionConverters.IterableIsParallelizable
+import org.scalameter._
+
+object Conversion :
+
+  val standardConfig = config (
+    Key.exec.minWarmupRuns := 10,
+    Key.exec.maxWarmupRuns := 20,
+    Key.exec.benchRuns := 20,
+    Key.verbose := false
+  ) withWarmer new Warmer.Default
+
+  val memConfig = config (
+    Key.exec.minWarmupRuns := 0,
+    Key.exec.maxWarmupRuns := 0,
+    Key.exec.benchRuns := 10,
+    Key.verbose := true
+  ) withWarmer Warmer.Zero
+
+  val vector = Vector.fill(10000000)("")
+  val list = vector.toList
+
+  @main def run =
+    val listTime = standardConfig measure {
+      list.par
+    }
+
+    println(s"list conversion time $listTime")
+
+    val vectorTime = standardConfig measure {
+      vector.par
+    }
+
+    println(s"vector conversion time $vectorTime")
+    println(s"difference : ${listTime.value / vectorTime.value}")