Coroutines sample 1

test.kt

fun main() {
    val durationMs = measureTimeMillis {
        val result = serve()
        println("Got result $result")
    }
    println("The processing is done in $durationMs ms")
}

fun serve(): Collection<Int> {
    return runBlocking {
        listOf(async { getItemDouble(1) }, async { getItemTriple(2) }).map { it.await() }
    }
}

suspend fun getItemDouble(i: Int): Int {
    delay(1000)
    return i * 2
}

suspend fun getItemTriple(i: Int): Int {
    delay(1000)
    return i * 3
}