perf(user-interactions): Make user interaction tracing faster and allocate less

CHANGELOG.md

@@ -15,6 +15,10 @@
 - Fix unregister `SystemEventsBroadcastReceiver` when entering background ([#4338](https://github.com/getsentry/sentry-java/pull/4338))
   - This should reduce ANRs seen with this class in the stack trace for Android 14 and above
 
+### Improvements
+
+- Make user interaction tracing faster and do fewer allocations ([#4347](https://github.com/getsentry/sentry-java/pull/4347))
+
 ## 8.8.0
 
 ### Features

sentry-android-core/src/main/java/io/sentry/android/core/internal/gestures/ViewUtils.java

@@ -8,6 +8,7 @@
 import io.sentry.internal.gestures.GestureTargetLocator;
 import io.sentry.internal.gestures.UiElement;
 import java.util.LinkedList;
+import java.util.List;
 import java.util.Queue;
 import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
@@ -60,6 +61,7 @@ private static boolean touchWithinBounds(
       final float y,
       final UiElement.Type targetType) {
 
+    final List<GestureTargetLocator> locators = options.getGestureTargetLocators();
     final Queue<View> queue = new LinkedList<>();
     queue.add(decorView);
 
@@ -79,7 +81,8 @@ private static boolean touchWithinBounds(
         }
       }
 
-      for (GestureTargetLocator locator : options.getGestureTargetLocators()) {
+      for (int i = 0; i < locators.size(); i++) {
+        final GestureTargetLocator locator = locators.get(i);
         final @Nullable UiElement newTarget = locator.locate(view, x, y, targetType);
         if (newTarget != null) {
           if (targetType == UiElement.Type.CLICKABLE) {

sentry-compose/proguard-rules.pro

@@ -13,7 +13,7 @@
 -keepnames class androidx.compose.foundation.CombinedClickableElement
 -keepnames class androidx.compose.foundation.ScrollingLayoutElement
 -keepnames class androidx.compose.ui.platform.TestTagElement { *; }
--keepnames class io.sentry.compose.SentryModifier.SentryTagModifierNodeElement { *; }
+-keepnames class io.sentry.compose.SentryModifier$SentryTagModifierNodeElement { *; }
 
 # R8 will warn about missing classes if people don't have androidx.compose-navigation on their
 # classpath, but this is fine, these classes are used in an internal class which is only used when

sentry-compose/src/androidMain/kotlin/io/sentry/compose/SentryComposeHelper.kt

@@ -18,10 +18,10 @@ internal class SentryComposeHelper(logger: ILogger) {
         loadField(logger, "androidx.compose.ui.platform.TestTagElement", "tag")
 
     private val sentryTagElementField: Field? =
-        loadField(logger, "io.sentry.compose.SentryModifier.SentryTagModifierNodeElement", "tag")
+        loadField(logger, "io.sentry.compose.SentryModifier${'$'}SentryTagModifierNodeElement", "tag")
 
     fun extractTag(modifier: Modifier): String? {
-        val type = modifier.javaClass.canonicalName
+        val type = modifier.javaClass.name
         // Newer Jetpack Compose uses TestTagElement as node elements
         // See
         // https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:compose/ui/ui/src/commonMain/kotlin/androidx/compose/ui/platform/TestTag.kt;l=34;drc=dcaa116fbfda77e64a319e1668056ce3b032469f
@@ -31,7 +31,7 @@ internal class SentryComposeHelper(logger: ILogger) {
             ) {
                 val value = testTagElementField.get(modifier)
                 return value as String?
-            } else if ("io.sentry.compose.SentryModifier.SentryTagModifierNodeElement" == type &&
+            } else if ("io.sentry.compose.SentryModifier${'$'}SentryTagModifierNodeElement" == type &&
                 sentryTagElementField != null
             ) {
                 val value = sentryTagElementField.get(modifier)

sentry-compose/src/androidMain/kotlin/io/sentry/compose/gestures/ComposeGestureTargetLocator.kt

@@ -70,7 +70,8 @@ public class ComposeGestureTargetLocator(private val logger: ILogger) : GestureT
                 var isScrollable = false
 
                 val modifiers = node.getModifierInfo()
-                for (modifierInfo in modifiers) {
+                for (index in modifiers.indices) {
+                    val modifierInfo = modifiers[index]
                     val tag = composeHelper!!.extractTag(modifierInfo.modifier)
                     if (tag != null) {
                         lastKnownTag = tag
@@ -93,7 +94,7 @@ public class ComposeGestureTargetLocator(private val logger: ILogger) : GestureT
                     } else {
                         val modifier = modifierInfo.modifier
                         // Newer Jetpack Compose 1.5 uses Node modifiers for clicks/scrolls
-                        val type = modifier.javaClass.canonicalName
+                        val type = modifier.javaClass.name
                         if ("androidx.compose.foundation.ClickableElement" == type ||
                             "androidx.compose.foundation.CombinedClickableElement" == type
                         ) {