squito

scala> trait A
defined trait A

scala> 

scala> class B extends A
defined class B

scala> class C extends A
defined class C

squito

trait ArraySummer[-T] {
  def sum(t: T): Float
}

/** one TypeClass per concrete implementation */
object SpecificSummers {
  implicit object SimpleWrappedFloatArraySummer extends ArraySummer[SimpleWrappedFloatArray] {
    def sum(arr: SimpleWrappedFloatArray): Float = {
      ...
    }

squito

trait ArrayLike[@specialized T] {
  def apply(idx: Int) : T
  def update(idx: Int, value: T)
  def length: Int
  def size: Int = length
}

def sumArrayLike(arr: ArrayLike[Float]): Float = {
  var idx = 0
  var sum = 0f

squito

val n = 1e7.toInt
val (rawArray, rawBB, rawFloatBuf) = initArrays(n)
println("result = " + th.pbench({
  var idx = 0
  var sum = 0f
  while(idx < n) {
    sum += rawArray(idx)
    idx += 1
  }
  sum