diff --git a/turbopack/crates/turbo-tasks-backend/src/backend/operation/mod.rs b/turbopack/crates/turbo-tasks-backend/src/backend/operation/mod.rs
index 270ac782f1bab..8ef495be391e8 100644
--- a/turbopack/crates/turbo-tasks-backend/src/backend/operation/mod.rs
+++ b/turbopack/crates/turbo-tasks-backend/src/backend/operation/mod.rs
@@ -64,6 +64,13 @@ impl<'a> ExecuteContext<'a> {
                 let items = self.backend.backing_storage.lookup_data(task_id);
                 task = self.backend.storage.access_mut(task_id);
                 if !task.persistance_state().is_restored() {
+                    if items.len() > 10000 {
+                        println!(
+                            "{} restored {} items",
+                            self.backend.get_task_desc_fn(task_id)(),
+                            items.len()
+                        );
+                    }
                     for item in items {
                         task.add(item);
                     }
@@ -224,10 +231,24 @@ impl<'a> TaskGuard<'a> {
 
     pub fn add_new(&mut self, item: CachedDataItem) {
         let added = self.add(item);
+        if added {
+            if self.task.len() == 10000 {
+                println!(
+                    "{} has > 10000 items",
+                    self.backend.get_task_desc_fn(self.task_id)()
+                );
+            }
+        }
         assert!(added, "Item already exists");
     }
 
     pub fn insert(&mut self, item: CachedDataItem) -> Option<CachedDataItemValue> {
+        if self.task.len() == 10000 {
+            println!(
+                "{} has > 10000 items",
+                self.backend.get_task_desc_fn(self.task_id)()
+            );
+        }
         let (key, value) = item.into_key_and_value();
         if self.task_id.is_transient() || !key.is_persistent() {
             self.task
diff --git a/turbopack/crates/turbo-tasks-backend/src/backend/storage.rs b/turbopack/crates/turbo-tasks-backend/src/backend/storage.rs
index cf0b1285699d5..1ac19b2bf5bbf 100644
--- a/turbopack/crates/turbo-tasks-backend/src/backend/storage.rs
+++ b/turbopack/crates/turbo-tasks-backend/src/backend/storage.rs
@@ -81,6 +81,13 @@ where
         }
     }
 
+    pub fn len(&self) -> usize {
+        match self {
+            InnerStorage::Plain { map, .. } => map.len(),
+            InnerStorage::Indexed { map, .. } => map.values().map(|m| m.len()).sum(),
+        }
+    }
+
     pub fn persistance_state(&self) -> &PersistanceState {
         match self {
             InnerStorage::Plain {