shin.kim nihsmik

nihsmik / main.kt

Created December 28, 2020 09:30

Iterable<T>.map vs Iterable<T>.forEach

	import kotlin.time.Duration
	import kotlin.time.measureTime

	fun main() {
	val mapResults = mutableListOf<Duration>()
	val forEachResults = mutableListOf<Duration>()
	repeat(10) {
	mapResults.add(measureTime { (0..1_000_000).map { it + 1 } })
	forEachResults.add(measureTime { (0..1_000_000).forEach { it + 1 } })
	}

nihsmik / main.kt

Created December 28, 2020 09:25

Kotlin Performance Test: Iterable<T>.forEach

	import kotlin.time.Duration
	import kotlin.time.measureTime

	fun main() {
	val durations = mutableListOf<Duration>()
	repeat(10) {
	val duration = measureTime { (0..1_000_000).forEach { it + 1 } }
	durations += duration
	}
	println(durations)

nihsmik / main.kt

Created December 28, 2020 09:24

Kotlin Performance Test: Iterable<T>.map

	import kotlin.time.Duration
	import kotlin.time.measureTime

	fun main() {
	val durations = mutableListOf<Duration>()
	repeat(10) {
	val duration = measureTime { (0..1_000_000).map { it + 1 } }
	durations += duration
	}
	println(durations)