/** File "Timing.java" by KWR for CSE250, Spring 2022.
    Illustrates use of Java System.nanoTime
 */
public class Timing {
 public static void main(String[] args) {
   double ms = 1000000.0
   double t1 = System.nanoTime()
   //var arr = Array.tabulate(1000000)(i => i)
   ArrayBuffer<int> arr = new ArrayBuffer.fill(1000000)(7)
   double t2 = System.nanoTime()
   //var lst = List.tabulate(1000000)(i => i)
   List<int> lst = new List.fill(1000000)(7)
   double t3 = System.nanoTime()
   println(s"\nCreation times (ms): array ${(t2 - t1)/ms}, list ${(t3 - t2)/ms}")

   println("\nJust to time prepending an element to each")
   double t4 = System.nanoTime()
   arr +:= -1
   double t5 = System.nanoTime()
   lst +:= -1
   double t6 = System.nanoTime()
   println(s"Prepend times (ms): array ${(t5 - t4)/ms}, list ${(t6 - t5)/ms}")

   println("\nHow about appending an element to each---")
   double t7 = System.nanoTime()
   arr :+= 1000000
   double t8 = System.nanoTime()
   lst :+= 1000000
   double t9 = System.nanoTime()
   println(s"Append times (ms): array ${(t8 - t7)/ms}, list ${(t9 - t8)/ms}")


   println("\nNow time to prepend onto a fresh array or list:")
   double t10 = System.nanoTime()
   var arr2 = -8 +: arr
   double t11 = System.nanoTime()
   var lst2 = -8 +: lst
   double t12 = System.nanoTime()
   println(s"Update times (ms): array ${(t11 - t10)/ms}, list ${(t12 - t11)/ms}")
}