Simple Kotlin micro-benchmarking tool (Android supported)

simpleMeasureTest.kt

package azagroup.test

import java.util.ArrayList


/**
 * Iterates provided by [callback] code [ITERATIONS]x[TEST_COUNT] times.
 * Performs warming by iterating [ITERATIONS]x[WARM_COUNT] times.
 */
fun simpleMeasureTest(
		ITERATIONS: Int = 1000,
		TEST_COUNT: Int = 10,
		WARM_COUNT: Int = 2,
		callback: ()->Unit
) {
	val results = ArrayList<Long>()
	var totalTime = 0L
	var t = 0

	println("$PRINT_REFIX -> go")

	while (++t <= TEST_COUNT + WARM_COUNT) {
		val startTime = System.currentTimeMillis()

		var i = 0
		while (i++ < ITERATIONS)
			callback()

		if (t <= WARM_COUNT) {
			println("$PRINT_REFIX Warming $t of $WARM_COUNT")
			continue
		}

		val time = System.currentTimeMillis() - startTime
		println(PRINT_REFIX+" "+time.toString()+"ms")

		results.add(time)
		totalTime += time
	}

	results.sort()

	val average = totalTime / TEST_COUNT
	val median = results[results.size / 2]

	println("$PRINT_REFIX -> average=${average}ms / median=${median}ms")
}

/**
 * Used to filter console messages easily
 */
private val PRINT_REFIX = "[TimeTest]"

A simple tool that can help you to measure the performance of your code in Kotlin.

Usage

simpleMeasureTest {
  // your code for the benchmark
}

With additional parameters:

simpleMeasureTest(10000, 5, 5) {
  // your code for the benchmark
}

Output

I/System.out: [TimeTest] -> go
I/System.out: [TimeTest] Warming 1 of 2
I/System.out: [TimeTest] Warming 2 of 2
I/System.out: [TimeTest] 770ms
I/System.out: [TimeTest] 784ms
I/System.out: [TimeTest] 788ms
I/System.out: [TimeTest] 881ms
I/System.out: [TimeTest] 802ms
I/System.out: [TimeTest] 794ms
I/System.out: [TimeTest] 789ms
I/System.out: [TimeTest] 786ms
I/System.out: [TimeTest] 750ms
I/System.out: [TimeTest] 762ms
I/System.out: [TimeTest] -> average=790ms / median=788ms

To make your life easier, create a new console output filter.
Here is my filter in Android Studio:

License

Use this code wherever you like.