Scala console power mode

gistfile1.scala

scala> :power
** Power User mode enabled - BEEP BOOP SPIZ **
** :phase has been set to 'typer'.          **
** scala.tools.nsc._ has been imported      **
** global._ and definitions._ also imported **
** Try  :help,  vals.<tab>,  power.<tab>    **

scala> :paste
// Entering paste mode (ctrl-D to finish)

def time[T](fn: =>T): T = {
  val start = System.currentTimeMillis
  val ret = fn
  println("Run in %d millis".format(System.currentTimeMillis - start))
  ret
}

// Exiting paste mode, now interpreting.

time: [T](fn: => T)T

scala> :wrap time
Set wrapper to 'time'

scala> (1 to 1000000) reduceLeft (_ + _)
Run in 19 millis
res0: Int = 1784293664