Kotlin Performance Test: Iterable<T>.forEach

main.kt

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)
    // [14.0ms, 7.96ms, 1.68ms, 1.70ms, 1.71ms, 1.86ms, 1.68ms, 1.68ms, 1.71ms, 1.74ms]
}