coroutines.kt

import kotlinx.coroutines.*

fun main(args: Array<String>) {
    getAnswerSynchronously()
    //getAnswerAsynchronously()
}

suspend fun getIntegerMultiplication(firstNumber: Int, secondNumber: Int): Int {
    delay(1000)
    return firstNumber * secondNumber
}

//Synchronous code
// Note the time taken, as the following are calculations are handled one after the other.
fun getAnswerSynchronously() = runBlocking {
    val startTime = System.currentTimeMillis()

    val set1 = withContext(Dispatchers.Default) { getIntegerMultiplication(10, 20) }
    val set2 = withContext(Dispatchers.Default) { getIntegerMultiplication(10, 30) }

    val sum = set1 + set2

    println("The sum is ${sum}")
    val endTime = System.currentTimeMillis()
    println("Time taken in synchronous code ${endTime - startTime}")
}

// Note the time taken, as the following are calculations are handled one after the other.


fun getAnswerAsynchronously() = runBlocking {
    val startTime = System.currentTimeMillis()

    val set1 = async { getIntegerMultiplication(10,20) }
    val set2 = async { getIntegerMultiplication(10,30) }

    val sum = set1.await() + set2.await()

    println("The sum is ${sum}")
    val endTime = System.currentTimeMillis()

    println("Time taken in Asynchronous code is ${endTime - startTime}")
}