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trait AbsFunction1[@specialized -T, @specialized +U] {
def apply(x: T): U
}
final class IntTest {
val niters = 10000
def transF(xs: Array[Int], f: AbsFunction1[Int, Int]) = {
var i = 0
var s = 0
while (i < xs.length) {
xs(i) = f(xs(i)) + 1
i += 1
}
}
def run() {
val xs = new Array[Int](10000)
val f = new AbsFunction1[Int, Int] {
def apply(x: Int): Int = x * x
}
for (j <- 0 until niters) {
transF(xs, f)
}
var acc = 0
for (i <- 0 until xs.length) acc += xs(i)
println(acc)
}
}
final class ClosureTest {
val niters = 10000
def transF(xs: Array[Int], f: Int => Int) = {
var i = 0
var s = 0
while (i < xs.length) {
xs(i) = f.apply(xs(i)) + 1
i += 1
}
}
def run() {
val xs = new Array[Int](10000)
// val f = (x: Int) => x * x
for (j <- 0 until niters) {
transF(xs, x => x * x)
}
var acc = 0
for (i <- 0 until xs.length) acc += xs(i)
println(acc)
}
}
object TestRunner {
(new IntTest).run()
(new ClosureTest).run()
}
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