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import scalaz._, Scalaz._
 
def bench[T](fn: => T):(T,Long) = {
	val start = System.currentTimeMillis()
	val result = fn
	val end = System.currentTimeMillis()
 
	(result, end - start)
}
 
val (result, time) = bench{List(Option(1)).traverse(x => x)}
 
// time = 150ms!?