Merge "Measure performance of MotionValues 1/2" into main

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

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    -->

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        android:debuggable="false"

        tools:ignore="HardcodedDebugMode"

        tools:replace="android:debuggable" />

</manifest>

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package com.android.mechanics.benchmark

import androidx.benchmark.junit4.BenchmarkRule

import androidx.benchmark.junit4.measureRepeated

import androidx.compose.runtime.mutableFloatStateOf

import androidx.test.ext.junit.runners.AndroidJUnit4

import com.android.mechanics.DistanceGestureContext

import com.android.mechanics.MotionValue

import com.android.mechanics.spec.InputDirection

import org.junit.Rule

import org.junit.Test

import org.junit.runner.RunWith

/** Benchmark, which will execute on an Android device. Previous results: go/mm-microbenchmarks */

@RunWith(AndroidJUnit4::class)

class MotionValueBenchmark {

    @get:Rule val benchmarkRule = BenchmarkRule()

    @Test

    fun createMotionValue() {

        val gestureContext = DistanceGestureContext(0f, InputDirection.Max, 2f)

        val currentInput = { 0f }

        benchmarkRule.measureRepeated { MotionValue(currentInput, gestureContext) }

    }

    @Test

    fun changeInput_readOutput() {

        val gestureContext = DistanceGestureContext(0f, InputDirection.Max, 2f)

        val a = mutableFloatStateOf(0f)

        val motionValue = MotionValue(a::floatValue, gestureContext)

        benchmarkRule.measureRepeated {

            runWithMeasurementDisabled { a.floatValue += 1f }

            motionValue.floatValue

        }

    }

    @Test

    fun readOutputMultipleTimes() {

        val gestureContext = DistanceGestureContext(0f, InputDirection.Max, 2f)

        val a = mutableFloatStateOf(0f)

        val motionValue = MotionValue(a::floatValue, gestureContext)

        benchmarkRule.measureRepeated {

            runWithMeasurementDisabled {

                a.floatValue += 1f

                motionValue.output

            }

            motionValue.output

        }

    }

    @Test

    fun readOutputMultipleTimesMeasureAll() {

        val gestureContext = DistanceGestureContext(0f, InputDirection.Max, 2f)

        val currentInput = mutableFloatStateOf(0f)

        val motionValue = MotionValue(currentInput::floatValue, gestureContext)

        benchmarkRule.measureRepeated {

            currentInput.floatValue += 1f

            motionValue.output

            motionValue.output

        }

    }

}