kotlin-stdlib/kotlin.system/measureNanoTime

measureNanoTime

inline fun measureNanoTime(block: () -> Unit): Long(source)

Executes the given block and returns elapsed time in nanoseconds. For a more human-readable and typed output, measureTime can be used instead.

Since Kotlin

1.0

See also

Samples

import kotlin.system.*

fun main() { 
   //sampleStart 
   var sqrt = 0
val number = 1000
val timeInNanos = measureNanoTime {
    while (sqrt * sqrt < number) sqrt++
}
println("(The operation took $timeInNanos ns)")
println("The approximate square root of $number is between ${sqrt - 1} and $sqrt") 
   //sampleEnd
}
inline fun measureNanoTime(block: () -> Unit): Long(source)

Deprecated

Warning since 1.9

Error since 2.1

Use measureTime() instead.

Replace with

import kotlin.time.measureTime
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measureTime(block).inWholeNanoseconds
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Executes the given block and returns elapsed time in nanoseconds.

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 nanoseconds using Duration.inWholeNanoseconds.

Since Kotlin

1.3

Samples

import kotlin.system.*

fun main() { 
   //sampleStart 
   var sqrt = 0
val number = 1000
val timeInNanos = measureNanoTime {
    while (sqrt * sqrt < number) sqrt++
}
println("(The operation took $timeInNanos ns)")
println("The approximate square root of $number is between ${sqrt - 1} and $sqrt") 
   //sampleEnd
}