Report process init time for app start

CHANGELOG.md

@@ -11,6 +11,7 @@
  - Decouple Profiler from Transaction ([#3101](https://github.com/getsentry/sentry-java/pull/3101))
  - Add options and sampling logic ([#3121](https://github.com/getsentry/sentry-java/pull/3121))
  - Add ContentProvider and start profile ([#3128](https://github.com/getsentry/sentry-java/pull/3128))
+- Report process init time as a span for app start performance ([#3159](https://github.com/getsentry/sentry-java/pull/3159))
 
 ### Fixes
 

sentry-android-core/api/sentry-android-core.api

@@ -424,6 +424,7 @@ public class io/sentry/android/core/performance/AppStartMetrics {
  public fun getAppStartTimeSpanWithFallback (Lio/sentry/android/core/SentryAndroidOptions;)Lio/sentry/android/core/performance/TimeSpan;
  public fun getAppStartType ()Lio/sentry/android/core/performance/AppStartMetrics$AppStartType;
  public fun getApplicationOnCreateTimeSpan ()Lio/sentry/android/core/performance/TimeSpan;
+ public fun getClassLoadedUptimeMs ()J
  public fun getContentProviderOnCreateTimeSpans ()Ljava/util/List;
  public static fun getInstance ()Lio/sentry/android/core/performance/AppStartMetrics;
  public fun getSdkInitTimeSpan ()Lio/sentry/android/core/performance/TimeSpan;

sentry-android-core/src/main/java/io/sentry/android/core/PerformanceAndroidEventProcessor.java

@@ -33,6 +33,7 @@ final class PerformanceAndroidEventProcessor implements EventProcessor {
  private static final String APP_METRICS_CONTENT_PROVIDER_OP = "contentprovider.load";
  private static final String APP_METRICS_ACTIVITIES_OP = "activity.load";
  private static final String APP_METRICS_APPLICATION_OP = "application.load";
+ private static final String APP_METRICS_PROCESS_INIT_OP = "process.load";
 
  private boolean sentStartMeasurement = false;
 
@@ -155,6 +156,23 @@ private void attachColdAppStartSpans(
  }
  }
 
+ // Process init
+ final long classInitUptimeMs = appStartMetrics.getClassLoadedUptimeMs();
+ final @NotNull TimeSpan appStartTimeSpan = appStartMetrics.getAppStartTimeSpan();
+ if (appStartTimeSpan.hasStarted()) {
+ final @NotNull TimeSpan processInitTimeSpan = new TimeSpan();
+ processInitTimeSpan.setStartedAt(appStartTimeSpan.getStartUptimeMs());
+ processInitTimeSpan.setStartUnixTimeMs(appStartTimeSpan.getStartTimestampMs());
+
+ processInitTimeSpan.setStoppedAt(classInitUptimeMs);
+ processInitTimeSpan.setDescription("Process Initialization");
+
+ txn.getSpans()
+ .add(
+ timeSpanToSentrySpan(
+ processInitTimeSpan, parentSpanId, traceId, APP_METRICS_PROCESS_INIT_OP));
+ }
+
  // Content Providers
  final @NotNull List<TimeSpan> contentProviderOnCreates =
  appStartMetrics.getContentProviderOnCreateTimeSpans();

sentry-android-core/src/main/java/io/sentry/android/core/performance/AppStartMetrics.java

@@ -31,6 +31,8 @@ public enum AppStartType {
  WARM
  }
 
+ private static final long CLASS_LOADED_UPTIME_MS = SystemClock.uptimeMillis();
+
  private static volatile @Nullable AppStartMetrics instance;
 
  private @NotNull AppStartType appStartType = AppStartType.UNKNOWN;
@@ -121,6 +123,10 @@ public void addActivityLifecycleTimeSpans(final @NotNull ActivityLifecycleTimeSp
  activityLifecycles.add(timeSpan);
  }
 
+ public long getClassLoadedUptimeMs() {
+ return CLASS_LOADED_UPTIME_MS;
+ }
+
  /**
  * @return the app start time span if it was started and perf-2 is enabled, falls back to the sdk
  * init time span otherwise

sentry-android-core/src/test/java/io/sentry/android/core/PerformanceAndroidEventProcessorTest.kt

@@ -246,6 +246,13 @@ class PerformanceAndroidEventProcessorTest {
  // then the app start metrics should be attached
  tr = sut.process(tr, Hint())
 
+ assertTrue(
+ tr.spans.any {
+ "process.load" == it.op &&
+ appStartSpan.spanId == it.parentSpanId
+ }
+ )
+
  assertTrue(
  tr.spans.any {
  "contentprovider.load" == it.op &&

sentry-android-core/src/test/java/io/sentry/android/core/performance/AppStartMetricsTest.kt

@@ -12,6 +12,7 @@ import org.mockito.kotlin.mock
 import org.robolectric.annotation.Config
 import kotlin.test.Test
 import kotlin.test.assertEquals
+import kotlin.test.assertNotEquals
 import kotlin.test.assertNull
 import kotlin.test.assertSame
 import kotlin.test.assertTrue
@@ -100,4 +101,9 @@ class AppStartMetricsTest {
  val sdkInitSpan = AppStartMetrics.getInstance().sdkInitTimeSpan
  assertSame(sdkInitSpan, timeSpan)
  }
+
+ @Test
+ fun `class load time is set`() {
+ assertNotEquals(0, AppStartMetrics.getInstance().classLoadedUptimeMs)
+ }
 }