djk29a

scala> for(masked <- 0 until 8) { println("Bits: 0xff & masked bits (" + masked + ") => " + (256 - (255 & (1 << masked))))  }
Bits: 0xff & masked bits (0) => 255
Bits: 0xff & masked bits (1) => 254
Bits: 0xff & masked bits (2) => 252
Bits: 0xff & masked bits (3) => 248
Bits: 0xff & masked bits (4) => 240
Bits: 0xff & masked bits (5) => 224
Bits: 0xff & masked bits (6) => 192
Bits: 0xff & masked bits (7) => 128

djk29a

object Timer {
  def time[R](block: => R): Pair[Long,_] = {
    val t0 = System.nanoTime()
    val result = block
    val diff = System.nanoTime() - t0
    // Post-timing processing can be added here, maybe
    // an optional argument to this method?
    Pair(diff, result)
    }
}