Startup macrobenchmark snippet for Android app startup article

startup-macrobenchmark.kt

package dev.jamescullimore.app.benchmark

import androidx.benchmark.macro.CompilationMode
import androidx.benchmark.macro.StartupMode
import androidx.benchmark.macro.StartupTimingMetric
import androidx.benchmark.macro.junit4.MacrobenchmarkRule
import org.junit.Rule
import org.junit.Test

class StartupBenchmarks {

    @get:Rule
    val benchmarkRule = MacrobenchmarkRule()

    @Test
    fun coldStartupWithoutProfile_setupFlow() = measureColdStart(
        compilationMode = CompilationMode.None(),
        onboardingDone = false
    )

    @Test
    fun coldStartupWithBaselineProfile_mainFlow() = measureColdStart(
        compilationMode = CompilationMode.Partial(),
        onboardingDone = true
    )

    private fun measureColdStart(
        compilationMode: CompilationMode,
        onboardingDone: Boolean
    ) = benchmarkRule.measureRepeated(
        packageName = "dev.jamescullimore.app",
        metrics = listOf(StartupTimingMetric()),
        startupMode = StartupMode.COLD,
        compilationMode = compilationMode,
        iterations = 10
    ) {
        launchForStartup(onboardingDone = onboardingDone)
    }
}