perf(discovery): baseline profile + hot-path fixes for the token leaderboard

apps/flipcash/app/build.gradle.kts

@@ -1,3 +1,4 @@
+import com.android.build.api.variant.BuildConfigField
 import com.bugsnag.gradle.dsl.debug
 import com.bugsnag.gradle.dsl.release
 import org.jetbrains.kotlin.gradle.dsl.JvmTarget
@@ -15,6 +16,7 @@ plugins {
     alias(libs.plugins.secrets)
     id("org.jetbrains.kotlin.plugin.compose")
     alias(libs.plugins.kover)
+    alias(libs.plugins.androidx.baselineprofile)
 }
 
 fun gitVersionCode(): Int {
@@ -154,6 +156,23 @@ kotlin {
     }
 }
 
+// Expose Compose testTags as resource-ids (for UiAutomator/Maestro/baseline-profile
+// generation) on every variant EXCEPT the shipping `release` — keeps internal ids like
+// `seed_input_field` out of the production wallet build. Read in App.kt as
+// BuildConfig.UI_TESTABLE. Refs Bugsnag 6a46563b.
+androidComponents {
+    onVariants { variant ->
+        variant.buildConfigFields?.put(
+            "UI_TESTABLE",
+            BuildConfigField(
+                "boolean",
+                (variant.name != "release").toString(),
+                "testTags exposed as resource-ids; false only for shipping release",
+            ),
+        )
+    }
+}
+
 dependencies {
     implementation(fileTree(mapOf("dir" to "libs", "include" to listOf("*.jar"))))
     implementation(project(":services:flipcash-compose"))
@@ -294,6 +313,9 @@ dependencies {
     implementation(libs.bugsnag)
 
     implementation(libs.androidx.profileinstaller)
+    // Consumes the generated baseline profile from the benchmark module and packages it
+    // into the APK (assets/dexopt/baseline.prof). Refs Bugsnag 6a46563b.
+    baselineProfile(project(":apps:flipcash:benchmark"))
 
     testImplementation(libs.junit)
     testImplementation(libs.kotlin.test.junit)

apps/flipcash/app/src/main/AndroidManifest.xml

@@ -58,6 +58,9 @@
         android:theme="@style/Theme.Code"
         tools:targetApi="tiramisu">
 
+        <!-- Lets Macrobenchmark/simpleperf attach to a non-debuggable release build. -->
+        <profileable android:shell="true" />
+
         <meta-data
             android:name="com.bugsnag.android.API_KEY"
             android:value="${BUGSNAG_API_KEY}" />

apps/flipcash/app/src/main/kotlin/com/flipcash/app/internal/ui/App.kt

@@ -133,7 +133,9 @@ internal fun App(
                         onRootReached = { /* handled by activity back press */ },
                     )
 
-                    val semanticsModifier = if (BuildConfig.DEBUG) {
+                    // UI_TESTABLE is true for debug + the profile-gen/benchmark variants and
+                    // false for the shipping release, so testTags aren't exposed in production.
+                    val semanticsModifier = if (BuildConfig.UI_TESTABLE) {
                         Modifier.semantics { testTagsAsResourceId = true }
                     } else Modifier
 

apps/flipcash/benchmark/build.gradle.kts

@@ -1,5 +1,6 @@
 plugins {
     id("com.android.test")
+    alias(libs.plugins.androidx.baselineprofile)
 }
 
 val contributorsSigningConfig = ContributorsSignatory(rootDir)

apps/flipcash/benchmark/src/main/kotlin/com/flipcash/benchmark/BaselineProfileGenerator.kt

@@ -5,6 +5,8 @@ import androidx.test.ext.junit.runners.AndroidJUnit4
 import androidx.test.filters.LargeTest
 import androidx.test.platform.app.InstrumentationRegistry
 import androidx.test.uiautomator.By
+import androidx.test.uiautomator.Direction
+import androidx.test.uiautomator.StaleObjectException
 import androidx.test.uiautomator.Until
 import org.junit.Rule
 import org.junit.Test
@@ -47,6 +49,7 @@ class BaselineProfileGenerator {
             if (onScanner) {
                 // Already logged in from a prior iteration
                 scannerJourney()
+                discoveryJourney()
                 walletJourney()
                 giveJourney()
                 menuJourney()
@@ -103,6 +106,88 @@ class BaselineProfileGenerator {
         device.waitForIdle()
     }
 
+    private fun MacrobenchmarkScope.discoveryJourney() {
+        // Open the Discover tab from the scanner bottom nav
+        device.wait(Until.findObject(By.text("Discover")), TIMEOUT)?.click()
+
+        device.wait(Until.findObject(By.res("discovery_leaderboard")), LOGIN_TIMEOUT)
+        device.waitForIdle()
+
+        // Open a token's info screen from the FRESH leaderboard first. (Tapping a row
+        // right after flinging is unreliable — the row is still settling — so do the
+        // token-info journey before scrolling the list.)
+        device.wait(Until.findObject(By.res("leaderboard_token_row")), TIMEOUT)?.click()
+        device.wait(Until.findObject(By.res("token_info_screen")), LOGIN_TIMEOUT)
+        device.waitForIdle()
+
+        // Scroll the token-info screen down until the market-cap chart's period tabs
+        // (the bottom-most element) are on screen — the chart sits at the very bottom.
+        scrollUntilVisible("token_info_screen", "market_cap_period_All", Direction.UP)
+
+        // Interact with the market-cap chart: scrub across it (highlights points), then
+        // toggle every time window (each reloads data + redraws the chart).
+        device.findObject(By.res("market_cap_chart"))?.let { chart ->
+            val b = chart.visibleBounds
+            val y = b.centerY()
+            device.drag(b.left + b.width() / 6, y, b.right - b.width() / 6, y, 40)
+        }
+        device.waitForIdle()
+        listOf("Week", "Month", "Year", "All", "Day").forEach { period ->
+            device.findObject(By.res("market_cap_period_$period"))?.click()
+            device.waitForIdle()
+        }
+
+        // Back to the leaderboard, then fling-scroll it so TokenLeaderboard /
+        // TokenMetricsRow / RankBadge composition + layout get compiled.
+        device.wait(Until.findObject(By.res("action_back")), TIMEOUT)?.click()
+        device.wait(Until.findObject(By.res("discovery_leaderboard")), TIMEOUT)
+        device.waitForIdle()
+        flingScroll("discovery_leaderboard", Direction.UP, 3)   // scroll down through the list
+        flingScroll("discovery_leaderboard", Direction.DOWN, 2) // and back up
+
+        // Close discovery to the scanner
+        device.wait(Until.findObject(By.res("action_close")), TIMEOUT)?.click()
+        device.wait(Until.findObject(By.res("scanner_view")), TIMEOUT)
+        device.waitForIdle()
+    }
+
+    /**
+     * Fling a scrollable [times], re-finding it each iteration. A Compose LazyColumn
+     * recomposes on fling, invalidating a held UiObject2 — so we re-query and tolerate
+     * a StaleObjectException rather than reusing a stale reference.
+     */
+    private fun MacrobenchmarkScope.flingScroll(resId: String, direction: Direction, times: Int) {
+        repeat(times) {
+            val scrollable = device.findObject(By.res(resId)) ?: return
+            try {
+                scrollable.setGestureMargin(device.displayWidth / 5)
+                scrollable.fling(direction)
+            } catch (_: StaleObjectException) {
+                // View recomposed mid-fling; the next iteration re-finds it.
+            }
+            device.waitForIdle()
+        }
+    }
+
+    /** Fling [scrollableResId] in [direction] (re-finding each time) until [targetResId] appears. */
+    private fun MacrobenchmarkScope.scrollUntilVisible(
+        scrollableResId: String,
+        targetResId: String,
+        direction: Direction,
+        maxFlings: Int = 6,
+    ) {
+        repeat(maxFlings) {
+            if (device.hasObject(By.res(targetResId))) return
+            val scrollable = device.findObject(By.res(scrollableResId)) ?: return
+            try {
+                scrollable.setGestureMargin(device.displayWidth / 5)
+                scrollable.fling(direction)
+            } catch (_: StaleObjectException) {
+            }
+            device.waitForIdle()
+        }
+    }
+
     private fun MacrobenchmarkScope.walletJourney() {
         // Open wallet sheet
         device.wait(Until.findObject(By.text("Wallet")), TIMEOUT)?.click()

apps/flipcash/benchmark/src/main/kotlin/com/flipcash/benchmark/LeaderboardScrollBenchmark.kt

@@ -0,0 +1,81 @@
+package com.flipcash.benchmark
+
+import androidx.benchmark.macro.BaselineProfileMode
+import androidx.benchmark.macro.CompilationMode
+import androidx.benchmark.macro.FrameTimingMetric
+import androidx.benchmark.macro.MacrobenchmarkScope
+import androidx.benchmark.macro.junit4.MacrobenchmarkRule
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.LargeTest
+import androidx.test.uiautomator.By
+import androidx.test.uiautomator.Direction
+import androidx.test.uiautomator.StaleObjectException
+import androidx.test.uiautomator.Until
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+
+/**
+ * Frame-timing benchmark for scrolling the Discover-tab token leaderboard — the screen
+ * that ANR'd on a low-end device (Bugsnag 6a46563b). Compares an unprofiled build against
+ * one compiled from the baseline profile so the profile's effect on first-scroll jank is
+ * measurable. Headline metric: P95 frameOverrunMs (negative = on time).
+ *
+ * Requires an already-authenticated device (run the BaselineProfileGenerator once, or
+ * log in, first — the setup navigates from a cold launch to the Discover leaderboard).
+ * On an emulator, results are suppressed-but-runnable (see the module's suppressErrors);
+ * report medians from a physical low-end device for real numbers.
+ */
+@RunWith(AndroidJUnit4::class)
+@LargeTest
+class LeaderboardScrollBenchmark {
+
+    @get:Rule
+    val rule = MacrobenchmarkRule()
+
+    @Test
+    fun scrollNoCompilation() = scroll(CompilationMode.None())
+
+    @Test
+    fun scrollBaselineProfile() =
+        scroll(CompilationMode.Partial(baselineProfileMode = BaselineProfileMode.Require))
+
+    private fun scroll(compilationMode: CompilationMode) {
+        rule.measureRepeated(
+            packageName = PACKAGE_NAME,
+            metrics = listOf(FrameTimingMetric()),
+            compilationMode = compilationMode,
+            iterations = 5,
+            setupBlock = {
+                pressHome()
+                startActivityAndWait()
+                // Navigate to the Discover leaderboard (device must be authenticated).
+                device.wait(Until.findObject(By.text("Discover")), TIMEOUT)?.click()
+                device.wait(Until.findObject(By.res("discovery_leaderboard")), LIST_TIMEOUT)
+                device.waitForIdle()
+            },
+        ) {
+            // Re-find each fling: the LazyColumn recomposes on scroll, which would
+            // otherwise invalidate a held UiObject2 (StaleObjectException).
+            repeat(3) { flingLeaderboard(Direction.UP) }
+            repeat(3) { flingLeaderboard(Direction.DOWN) }
+        }
+    }
+
+    private fun MacrobenchmarkScope.flingLeaderboard(direction: Direction) {
+        val list = device.findObject(By.res("discovery_leaderboard")) ?: return
+        try {
+            list.setGestureMargin(device.displayWidth / 5)
+            list.fling(direction)
+        } catch (_: StaleObjectException) {
+            // recomposed mid-fling; next call re-finds
+        }
+        device.waitForIdle()
+    }
+
+    companion object {
+        private const val PACKAGE_NAME = "com.flipcash.app.android"
+        private const val TIMEOUT = 5_000L
+        private const val LIST_TIMEOUT = 15_000L
+    }
+}

apps/flipcash/features/discovery/src/main/kotlin/com/flipcash/app/discovery/internal/TokenDiscoveryScreenContent.kt

@@ -35,6 +35,7 @@ import com.getcode.manager.BottomBarManager
 import com.getcode.opencode.model.financial.HolderMetrics
 import com.getcode.opencode.model.financial.MintMetadata
 import com.getcode.opencode.model.financial.Token
+import com.getcode.solana.keys.base58
 import com.getcode.opencode.model.financial.VmMetadata
 import com.getcode.opencode.model.ui.DiscoverCategory
 import com.getcode.opencode.model.ui.WindowedRange
@@ -99,7 +100,9 @@ private fun LoadedPopular_Preview() {
         TokenDiscoveryScreenContent(
             state = TokenDiscoveryViewModel.State(
                 category = DiscoverCategory.Popular,
-                tokens = Loadable.Loaded(sampleTokens())
+                tokens = Loadable.Loaded(
+                    sampleTokens().map { LeaderboardEntry(key = it.address.base58(), token = it) }
+                )
             )
         ) { }
     }

apps/flipcash/features/discovery/src/main/kotlin/com/flipcash/app/discovery/internal/TokenDiscoveryViewModel.kt

@@ -11,6 +11,7 @@ import com.getcode.opencode.controllers.CurrencyController
 import com.getcode.opencode.model.financial.Token
 import com.getcode.opencode.model.ui.DiscoverCategory
 import com.getcode.solana.keys.Mint
+import com.getcode.solana.keys.base58
 import com.getcode.util.resources.ResourceHelper
 import com.flipcash.libs.coroutines.DispatcherProvider
 import com.getcode.manager.BottomBarManager
@@ -26,6 +27,17 @@ import kotlinx.coroutines.flow.mapNotNull
 import kotlinx.coroutines.flow.onEach
 import javax.inject.Inject
 
+/**
+ * A leaderboard row's token paired with its precomputed LazyColumn key. The key is
+ * the token's base58 address (BigInteger encoding); computing it once here at load
+ * keeps it out of the `itemsIndexed { key = … }` hot path, which Compose re-runs
+ * over the viewport's nearby range on scroll. Refs Bugsnag 6a46563b.
+ */
+internal data class LeaderboardEntry(
+    val key: String,
+    val token: Token,
+)
+
 @HiltViewModel
 internal class TokenDiscoveryViewModel @Inject constructor(
     private val currencyController: CurrencyController,
@@ -42,7 +54,7 @@ internal class TokenDiscoveryViewModel @Inject constructor(
     data class State(
         val createEnabled: Boolean = false,
         val category: DiscoverCategory? = null,
-        val tokens: Loadable<List<Token>> = Loadable.Loading(),
+        val tokens: Loadable<List<LeaderboardEntry>> = Loadable.Loading(),
         val minimumHolderAmount: Fiat = 10.toFiat(),
     )
 
@@ -55,7 +67,7 @@ internal class TokenDiscoveryViewModel @Inject constructor(
             val fromUser: Boolean = false
         ) : Event
 
-        data class OnTokensUpdated(val loadable: Loadable<List<Token>>) : Event
+        data class OnTokensUpdated(val loadable: Loadable<List<LeaderboardEntry>>) : Event
 
         data class LoadTokensForCategory(val category: DiscoverCategory) : Event
         data object Refresh : Event
@@ -97,8 +109,9 @@ internal class TokenDiscoveryViewModel @Inject constructor(
             .map { it.category }
             .map { currencyController.discoverTokens(it) }
             .onResult(
-                onSuccess = {
-                    dispatchEvent(Event.OnTokensUpdated(Loadable.Loaded(it)))
+                onSuccess = { tokens ->
+                    val entries = tokens.map { LeaderboardEntry(key = it.address.base58(), token = it) }
+                    dispatchEvent(Event.OnTokensUpdated(Loadable.Loaded(entries)))
                 },
                 onError = { error ->
                     dispatchEvent(