Feature/baseline benchmarks

.github/workflows/ci.yml

@@ -15,6 +15,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Make gradlew executable
+        run: chmod +x gradlew
+
       - uses: actions/setup-java@v4
         with:
           java-version: 17
@@ -43,6 +46,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Make gradlew executable
+        run: chmod +x gradlew
+
       - uses: actions/setup-java@v4
         with:
           java-version: 17
@@ -61,10 +67,17 @@ jobs:
         uses: reactivecircus/android-emulator-runner@v2
         with:
           api-level: 34
-          target: aosp_atd
+          target: default
           arch: x86_64
+          emulator-boot-timeout: 600
           script: ./gradlew :benchmarks:connectedBenchmarkAndroidTest
 
+      - name: Parse Benchmark Results
+        if: always()
+        run: |
+          echo "### Macrobenchmark Results" >> $GITHUB_STEP_SUMMARY
+          python3 benchmarks/BenchmarkResultsParser.py >> $GITHUB_STEP_SUMMARY
+
       - name: Upload benchmark JSON
         if: always()
         uses: actions/upload-artifact@v4

.gitignore

@@ -8,7 +8,7 @@
 /.idea/navEditor.xml
 /.idea/assetWizardSettings.xml
 .DS_Store
-/build
+build/
 /captures
 .externalNativeBuild
 .cxx
@@ -23,3 +23,4 @@ local.properties
 /.idea/runConfigurations.xml
 /.idea/studiobot.xml
 /.idea/vcs.xml
+.idea/androidTestResultsUserPreferences.xml

app/build.gradle.kts

@@ -26,12 +26,13 @@ android {
                 getDefaultProguardFile("proguard-android-optimize.txt"),
                 "proguard-rules.pro"
             )
+            signingConfig = signingConfigs.getByName("debug")
         }
         // Dedicated build type for running Macrobenchmarks and generating Baseline Profiles.
         // Mirrors release config but keeps the debug signing cert so the benchmark module
         // can install it without a release keystore on CI.
         create("benchmark") {
-            initWith(buildTypes.getByName("release"))
+            initWith(getByName("release"))
             signingConfig = signingConfigs.getByName("debug")
             matchingFallbacks += listOf("release")
             isDebuggable = false
@@ -79,4 +80,5 @@ dependencies {
     androidTestImplementation(libs.androidx.espresso.core)
     androidTestImplementation(platform(libs.androidx.compose.bom))
     androidTestImplementation(libs.androidx.compose.ui.test.junit4)
+    androidTestImplementation(libs.kotlinx.coroutines.test)
 }

app/src/androidTest/java/com/aquib/androidperflab/RecompositionBenchmark.kt

@@ -0,0 +1,124 @@
+package com.aquib.androidperflab
+
+import android.os.Bundle
+import android.util.Log
+import androidx.activity.ComponentActivity
+import androidx.compose.runtime.Recomposer
+import androidx.compose.ui.test.junit4.createAndroidComposeRule
+import androidx.compose.ui.test.onNodeWithTag
+import androidx.compose.ui.test.performClick
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.platform.app.InstrumentationRegistry
+import com.aquib.androidperflab.ui.DetailScreen
+import com.aquib.androidperflab.ui.FeedItem
+import com.aquib.androidperflab.ui.theme.AndroidPerfLabTheme
+import kotlinx.coroutines.test.TestCoroutineScheduler
+import kotlinx.coroutines.test.runTest
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+class RecompositionBenchmark {
+    // Shared scheduler drives virtual time for runTest blocks in this class.
+    private val testScheduler = TestCoroutineScheduler()
+
+    @get:Rule
+    val composeTestRule = createAndroidComposeRule<ComponentActivity>()
+
+    private val testItem = FeedItem(
+        id = 42,
+        title = "Performance Testing in Android",
+        subtitle = "Benchmarking Compose recompositions",
+        description = "Android performance testing involves many dimensions including startup " +
+            "time, frame rendering, and recomposition overhead. This article explores " +
+            "techniques for measuring each of these in depth.",
+        author = "Mohd Aquib",
+        imageUrl = "",
+        timestampMillis = 1_700_000_000_000L,
+    )
+
+    @Before
+    fun setUp() {
+        composeTestRule.setContent {
+            AndroidPerfLabTheme {
+                DetailScreen(item = testItem, onBack = {})
+            }
+        }
+        // Pause Compose's virtual clock so the LaunchedEffect tick loop in DetailScreen
+        // does not fire between measurement checkpoints, keeping deltas deterministic.
+        composeTestRule.mainClock.autoAdvance = false
+        // Drain the initial composition pass before any test captures a baseline count.
+        composeTestRule.mainClock.advanceTimeByFrame()
+        composeTestRule.waitForIdle()
+    }
+
+    // ── Like button ──────────────────────────────────────────────────────────────
+
+    @Test
+    fun likeButton_recompositionCount() {
+        val before = totalChangeCount()
+
+        composeTestRule.onNodeWithTag("detail_like_button").performClick()
+        composeTestRule.mainClock.advanceTimeByFrame()
+        composeTestRule.waitForIdle()
+
+        val delta = totalChangeCount() - before
+        record("like_button_click", delta)
+    }
+
+    // ── Bookmark button ──────────────────────────────────────────────────────────
+
+    @Test
+    fun bookmarkButton_recompositionCount() {
+        val before = totalChangeCount()
+
+        composeTestRule.onNodeWithTag("detail_bookmark_button").performClick()
+        composeTestRule.mainClock.advanceTimeByFrame()
+        composeTestRule.waitForIdle()
+
+        val delta = totalChangeCount() - before
+        record("bookmark_button_click", delta)
+    }
+
+    // ── Tick-driven recompositions ───────────────────────────────────────────────
+
+    @Test
+    fun tickEffect_recompositionCountPerInterval() = runTest(testScheduler) {
+        val tickCount = 5
+        var totalDelta = 0L
+
+        repeat(tickCount) { index ->
+            val before = totalChangeCount()
+
+            // Advance Compose's main clock to unblock the delay(500L) in LaunchedEffect.
+            composeTestRule.mainClock.advanceTimeBy(500L)
+            // Advance TestCoroutineScheduler by the same interval so virtual time
+            // stays in sync for any coroutines running on testScheduler.
+            testScheduler.advanceTimeBy(500L)
+            composeTestRule.waitForIdle()
+
+            val delta = totalChangeCount() - before
+            totalDelta += delta
+            Log.d(TAG, "Tick ${index + 1}: $delta recompositions")
+        }
+
+        record("tick_effect_per_interval", totalDelta / tickCount)
+    }
+
+    // ── Helpers ──────────────────────────────────────────────────────────────────
+
+    private fun totalChangeCount(): Long =
+        Recomposer.runningRecomposers.value.sumOf { it.changeCount }
+
+    private fun record(interaction: String, recompositionCount: Long) {
+        Log.d(TAG, "[$interaction] recompositions per interaction: $recompositionCount")
+        val bundle = Bundle().apply { putLong(interaction, recompositionCount) }
+        InstrumentationRegistry.getInstrumentation().sendStatus(2, bundle)
+    }
+
+    companion object {
+        private const val TAG = "RecompositionBenchmark"
+    }
+}

benchmarks/BenchmarkResultsParser.py

@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+import json
+import glob
+import os
+
+def format_value(val):
+    if val is None:
+        return "-"
+    if isinstance(val, (int, float)):
+        return f"{val:.2f}"
+    return str(val)
+
+def main():
+    # Search for benchmark data files in the standard output directory
+    search_path = 'benchmarks/build/outputs/connected_android_test_additional_output/**/*-benchmarkData.json'
+    files = glob.glob(search_path, recursive=True)
+
+    if not files:
+        # Fallback to search from current directory
+        files = glob.glob('**/*-benchmarkData.json', recursive=True)
+
+    if not files:
+        print("No benchmark results found.")
+        return
+
+    print("| Metric | Min | Median | Max |")
+    print("| :--- | :---: | :---: | :---: |")
+
+    # Track metrics to avoid duplicates if multiple files are found
+    seen_results = set()
+
+    for file_path in files:
+        try:
+            with open(file_path, 'r') as f:
+                data = json.load(f)
+
+            if 'benchmarks' not in data:
+                continue
+
+            for benchmark in data['benchmarks']:
+                benchmark_name = benchmark.get('name', 'Unknown')
+                metrics = benchmark.get('metrics', {})
+
+                for metric_name, values in metrics.items():
+                    m_min = values.get('minimum')
+                    m_median = values.get('median')
+                    m_max = values.get('maximum')
+
+                    # Some metrics might be in nested objects depending on version
+                    # but usually minimum/median/maximum are at the top level of the metric object
+
+                    display_name = f"{benchmark_name}_{metric_name}"
+                    result_row = (display_name, m_min, m_median, m_max)
+
+                    if result_row not in seen_results:
+                        print(f"| {display_name} | {format_value(m_min)} | {format_value(m_median)} | {format_value(m_max)} |")
+                        seen_results.add(result_row)
+        except Exception as e:
+            # Print error to stderr so it doesn't mess up the markdown table on stdout
+            import sys
+            print(f"Error parsing {file_path}: {e}", file=sys.stderr)
+
+if __name__ == "__main__":
+    main()

benchmarks/build.gradle.kts

@@ -37,6 +37,7 @@ android {
 }
 
 dependencies {
+    implementation(libs.androidx.benchmark.junit4)
     implementation(libs.androidx.benchmark.macro.junit4)
     implementation(libs.androidx.test.uiautomator)
     implementation(libs.androidx.junit)

benchmarks/src/androidTest/java/com/aquib/androidperflab/benchmarks/BaselineProfileGenerator.kt → benchmarks/src/main/java/com/aquib/androidperflab/benchmarks/BaselineProfileGenerator.kt

@@ -17,7 +17,6 @@ import org.junit.runner.RunWith
  */
 @RunWith(AndroidJUnit4::class)
 class BaselineProfileGenerator {
-
     @get:Rule
     val baselineProfileRule = BaselineProfileRule()