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import scala.tools.partest._
// Attempting to verify slice isn't 100,000x slower
// with views than non-views.
class Runner(num: Int, reps: Int) extends TestUtil {
var dummy = 0
val range = Array.range(0, num)
def iteratorSlice = {
def it = range.iterator.slice(num - 2, num)
for (i <- 1 to reps)
it foreach (dummy = _)
}
def viewSlice = {
val view = range.view.slice(num - 2, num)
for (i <- 1 to reps)
view foreach (dummy = _)
}
def straightSlice = {
val xs = range.slice(num - 2, num)
for (i <- 1 to reps)
xs foreach (dummy = _)
}
def run(multiple: Double) = {
verifySpeed(straightSlice, iteratorSlice, multiple)
verifySpeed(straightSlice, viewSlice, multiple)
}
}
object Test {
def main(args: Array[String]): Unit = {
// warmup
{ val r = new Runner(1000000, 10) ; r.straightSlice ; r.iteratorSlice ; r.viewSlice }
new Runner(10000000, 10) run 500
new Runner(10000000, 50) run 300
}
}
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