Add benchmarks for take and drop

Author: Antoine Brunner

bench-run/inputs/drop.in

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+size:0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50

bench-run/inputs/take.in

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+size:0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50

bench-run/src/main/scala/tuples/Drop.scala

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+package dotty.tools.benchmarks.tuples
+
+import org.openjdk.jmh.annotations._
+import scala.runtime.DynamicTuple
+
+@State(Scope.Thread)
+class Drop {
+  @Param(Array("0"))
+  var size: Int = _
+  var tuple: Tuple = _
+  var array: Array[Object] = _
+  var half: Int = _
+
+  @Setup
+  def setup(): Unit = {
+    tuple = ()
+    half = size / 2
+
+    for (i <- 1 to size)
+      tuple = "elem" *: tuple
+
+    array = new Array[Object](size)
+  }
+
+  @Benchmark
+  def tupleDrop(): Tuple = {
+    DynamicTuple.dynamicDrop(tuple, half)
+  }
+
+  @Benchmark
+  def arrayDrop(): Array[Object] = {
+    array.drop(half)
+  }
+}

bench-run/src/main/scala/tuples/Take.scala

@@ -0,0 +1,34 @@
+package dotty.tools.benchmarks.tuples
+
+import org.openjdk.jmh.annotations._
+import scala.runtime.DynamicTuple
+
+@State(Scope.Thread)
+class Take {
+  @Param(Array("0"))
+  var size: Int = _
+  var tuple: Tuple = _
+  var array: Array[Object] = _
+  var half: Int = _
+
+  @Setup
+  def setup(): Unit = {
+    tuple = ()
+    half = size / 2
+
+    for (i <- 1 to size)
+      tuple = "elem" *: tuple
+
+    array = new Array[Object](size)
+  }
+
+  @Benchmark
+  def tupleTake(): Tuple = {
+    DynamicTuple.dynamicTake(tuple, half)
+  }
+
+  @Benchmark
+  def arrayTake(): Array[Object] = {
+    array.take(half)
+  }
+}