measureTimeMillis

JVM
1.0
inline fun measureTimeMillis ( block : ( ) -> Unit ) : Long
(source)
Native
1.3
@DeprecatedSinceKotlin ( "1.9" ) inline fun measureTimeMillis (
block : ( ) -> Unit
) : Long

(source)
Deprecated: Use measureTime() instead.
For JVM

Executes the given block and returns elapsed time in milliseconds.

import kotlin.system.*

fun main(args: Array<String>) {
//sampleStart
val numbers: List<Int>
val timeInMillis = measureTimeMillis {
    numbers = buildList {
        addAll(0..100)
        shuffle()
        sortDescending()
    }
}
// here numbers are initialized and sorted
println(numbers.first()) // 100

println("(The operation took $timeInMillis ms)")
//sampleEnd
}
For Native

Executes the given block and returns elapsed time in milliseconds.

This function is deprecated. To measure the duration of execution of a block of code, use measureTime or measureTimedValue instead. The resulting Duration then can be expressed as a Long number of milliseconds using Duration.inWholeMilliseconds .

import kotlin.system.*

fun main(args: Array<String>) {
//sampleStart
val numbers: List<Int>
val timeInMillis = measureTimeMillis {
    numbers = buildList {
        addAll(0..100)
        shuffle()
        sortDescending()
    }
}
// here numbers are initialized and sorted
println(numbers.first()) // 100

println("(The operation took $timeInMillis ms)")
//sampleEnd
}