Learning Concurrency in Kotlin

Being explicit

Concurrency needs to be thought about and designed for, and because of that, it's important to make it explicit in terms of when a computation should run concurrently. Suspendable computations will run sequentially by default. Since they don't block the thread when suspended, there's no direct drawback:

fun main(args: Array<String>) = runBlocking {    val time = measureTimeMillis {        val name = getName()        val lastName = getLastName()        println("Hello, $name $lastName")    }    println("Execution took $time ms")}suspend fun getName(): String {    delay(1000)    return "Susan"}suspend fun getLastName(): String {    delay(1000)    return "Calvin"}

In this code, main() executes the suspendable computations getName() and getLastName() in the current thread, ...