diff --git a/meilisearch-lib/src/index_resolver/mod.rs b/meilisearch-lib/src/index_resolver/mod.rs
index 97265e509..316528647 100644
--- a/meilisearch-lib/src/index_resolver/mod.rs
+++ b/meilisearch-lib/src/index_resolver/mod.rs
@@ -170,7 +170,7 @@ mod real {
             }
         }
 
-        pub async fn process_document_addition_batch(&self, mut tasks: Vec<Task>) -> Vec<Task> {
+        pub async fn process_document_addition_batch(&self, tasks: &mut [Task]) {
             fn get_content_uuid(task: &Task) -> Uuid {
                 match task {
                     Task {
@@ -218,7 +218,8 @@ mod real {
                                     timestamp: now,
                                 });
                             }
-                            return tasks;
+
+                            return;
                         }
                     };
 
@@ -253,8 +254,6 @@ mod real {
                     for task in tasks.iter_mut() {
                         task.events.push(event.clone());
                     }
-
-                    tasks
                 }
                 _ => panic!("invalid batch!"),
             }
@@ -355,7 +354,7 @@ mod real {
         }
 
         pub async fn process_task(&self, task: &mut Task) {
-            match self.process_task_inner(&task).await {
+            match self.process_task_inner(task).await {
                 Ok(res) => task.events.push(TaskEvent::succeeded(res)),
                 Err(e) => task.events.push(TaskEvent::failed(e)),
             }
@@ -509,7 +508,7 @@ mod test {
             Self::Mock(mocker)
         }
 
-        pub async fn process_document_addition_batch(&self, tasks: Vec<Task>) -> Vec<Task> {
+        pub async fn process_document_addition_batch(&self, tasks: &mut [Task]) {
             match self {
                 IndexResolver::Real(r) => r.process_document_addition_batch(tasks).await,
                 IndexResolver::Mock(m) => unsafe {
diff --git a/meilisearch-lib/src/tasks/handlers/index_resolver_handler.rs b/meilisearch-lib/src/tasks/handlers/index_resolver_handler.rs
index 21751cd1c..0975ba912 100644
--- a/meilisearch-lib/src/tasks/handlers/index_resolver_handler.rs
+++ b/meilisearch-lib/src/tasks/handlers/index_resolver_handler.rs
@@ -19,9 +19,7 @@ where
     async fn process_batch(&self, mut batch: Batch) -> Batch {
         match batch.content {
             BatchContent::DocumentsAdditionBatch(ref mut tasks) => {
-                *tasks = self
-                    .process_document_addition_batch(std::mem::take(tasks))
-                    .await;
+                self.process_document_addition_batch(tasks).await;
             }
             BatchContent::IndexUpdate(ref mut task) => {
                 self.process_task(task).await;
@@ -174,7 +172,7 @@ mod test {
                 let mocker = Mocker::default();
                 match task.content {
                     TaskContent::DocumentAddition { .. } => {
-                        mocker.when::<Vec<Task>, Vec<Task>>("process_document_addition_batch").then(|tasks| tasks);
+                        mocker.when::<&mut [Task], ()>("process_document_addition_batch").then(|_| ());
                     }
                     TaskContent::Dump { .. } => (),
                     _ => {