diff --git a/CHANGELOG.md b/CHANGELOG.md
index 24d0d0740c..1823146d55 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## Unreleased
+
+### Performance
+
+- Remove an unused lock from `SentryPerformanceProvider`, which was allocated on every cold start in `ContentProvider.onCreate` without ever being acquired ([#5871](https://github.com/getsentry/sentry-java/pull/5871))
+
 ## 8.51.0
 
 ### Features
diff --git a/sentry-android-core/src/main/java/io/sentry/android/core/SentryPerformanceProvider.java b/sentry-android-core/src/main/java/io/sentry/android/core/SentryPerformanceProvider.java
index c85fe12674..c37d384aee 100644
--- a/sentry-android-core/src/main/java/io/sentry/android/core/SentryPerformanceProvider.java
+++ b/sentry-android-core/src/main/java/io/sentry/android/core/SentryPerformanceProvider.java
@@ -23,7 +23,6 @@
 import io.sentry.android.core.internal.util.SentryFrameMetricsCollector;
 import io.sentry.android.core.performance.AppStartMetrics;
 import io.sentry.android.core.performance.TimeSpan;
-import io.sentry.util.AutoClosableReentrantLock;
 import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileInputStream;
@@ -46,7 +45,6 @@ public final class SentryPerformanceProvider extends EmptySecureContentProvider
 
   private final @NotNull ILogger logger;
   private final @NotNull BuildInfoProvider buildInfoProvider;
-  private final @NotNull AutoClosableReentrantLock lock = new AutoClosableReentrantLock();
 
   @TestOnly
   SentryPerformanceProvider(