diff --git a/benchmarks/benches/indexing.rs b/benchmarks/benches/indexing.rs
index a409e1343..d567b3da1 100644
--- a/benchmarks/benches/indexing.rs
+++ b/benchmarks/benches/indexing.rs
@@ -59,7 +59,7 @@ fn setup_settings<'t>(
     let sortable_fields = sortable_fields.iter().map(|s| s.to_string()).collect();
     builder.set_sortable_fields(sortable_fields);
 
-    builder.execute(|_| ()).unwrap();
+    builder.execute(|_| (), || false).unwrap();
 }
 
 fn setup_index_with_settings<'t>(
@@ -131,9 +131,15 @@ fn indexing_songs_default(c: &mut Criterion) {
                 let config = IndexerConfig::default();
                 let indexing_config = IndexDocumentsConfig::default();
                 let mut wtxn = index.write_txn().unwrap();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
 
                 let documents = utils::documents_from(datasets_paths::SMOL_SONGS, "csv");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
@@ -169,9 +175,15 @@ fn reindexing_songs_default(c: &mut Criterion) {
                 let config = IndexerConfig::default();
                 let indexing_config = IndexDocumentsConfig::default();
                 let mut wtxn = index.write_txn().unwrap();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
 
                 let documents = utils::documents_from(datasets_paths::SMOL_SONGS, "csv");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
@@ -185,9 +197,15 @@ fn reindexing_songs_default(c: &mut Criterion) {
                 let config = IndexerConfig::default();
                 let indexing_config = IndexDocumentsConfig::default();
                 let mut wtxn = index.write_txn().unwrap();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
 
                 let documents = utils::documents_from(datasets_paths::SMOL_SONGS, "csv");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
@@ -225,9 +243,15 @@ fn deleting_songs_in_batches_default(c: &mut Criterion) {
                 let config = IndexerConfig::default();
                 let mut wtxn = index.write_txn().unwrap();
                 let indexing_config = IndexDocumentsConfig::default();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
                 let documents = utils::documents_from(datasets_paths::SMOL_SONGS, "csv");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
                 user_error.unwrap();
@@ -282,9 +306,15 @@ fn indexing_songs_in_three_batches_default(c: &mut Criterion) {
                 let config = IndexerConfig::default();
                 let mut wtxn = index.write_txn().unwrap();
                 let indexing_config = IndexDocumentsConfig::default();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
                 let documents = utils::documents_from(datasets_paths::SMOL_SONGS_1_2, "csv");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
                 user_error.unwrap();
@@ -298,18 +328,30 @@ fn indexing_songs_in_three_batches_default(c: &mut Criterion) {
                 let config = IndexerConfig::default();
                 let indexing_config = IndexDocumentsConfig::default();
                 let mut wtxn = index.write_txn().unwrap();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
                 let documents = utils::documents_from(datasets_paths::SMOL_SONGS_3_4, "csv");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
                 user_error.unwrap();
                 builder.execute().unwrap();
 
                 let indexing_config = IndexDocumentsConfig::default();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
                 let documents = utils::documents_from(datasets_paths::SMOL_SONGS_4_4, "csv");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
                 user_error.unwrap();
@@ -345,9 +387,15 @@ fn indexing_songs_without_faceted_numbers(c: &mut Criterion) {
                 let config = IndexerConfig::default();
                 let indexing_config = IndexDocumentsConfig::default();
                 let mut wtxn = index.write_txn().unwrap();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
 
                 let documents = utils::documents_from(datasets_paths::SMOL_SONGS, "csv");
 
@@ -384,9 +432,15 @@ fn indexing_songs_without_faceted_fields(c: &mut Criterion) {
                 let config = IndexerConfig::default();
                 let indexing_config = IndexDocumentsConfig::default();
                 let mut wtxn = index.write_txn().unwrap();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
 
                 let documents = utils::documents_from(datasets_paths::SMOL_SONGS, "csv");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
@@ -423,9 +477,15 @@ fn indexing_wiki(c: &mut Criterion) {
                 let indexing_config =
                     IndexDocumentsConfig { autogenerate_docids: true, ..Default::default() };
                 let mut wtxn = index.write_txn().unwrap();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
 
                 let documents = utils::documents_from(datasets_paths::SMOL_WIKI_ARTICLES, "csv");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
@@ -461,9 +521,15 @@ fn reindexing_wiki(c: &mut Criterion) {
                 let indexing_config =
                     IndexDocumentsConfig { autogenerate_docids: true, ..Default::default() };
                 let mut wtxn = index.write_txn().unwrap();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
 
                 let documents = utils::documents_from(datasets_paths::SMOL_WIKI_ARTICLES, "csv");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
@@ -478,9 +544,15 @@ fn reindexing_wiki(c: &mut Criterion) {
                 let indexing_config =
                     IndexDocumentsConfig { autogenerate_docids: true, ..Default::default() };
                 let mut wtxn = index.write_txn().unwrap();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
 
                 let documents = utils::documents_from(datasets_paths::SMOL_WIKI_ARTICLES, "csv");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
@@ -518,9 +590,15 @@ fn deleting_wiki_in_batches_default(c: &mut Criterion) {
                 let mut wtxn = index.write_txn().unwrap();
                 let indexing_config =
                     IndexDocumentsConfig { autogenerate_docids: true, ..Default::default() };
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
                 let documents = utils::documents_from(datasets_paths::SMOL_WIKI_ARTICLES, "csv");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
                 user_error.unwrap();
@@ -576,9 +654,15 @@ fn indexing_wiki_in_three_batches(c: &mut Criterion) {
                 let config = IndexerConfig::default();
                 let indexing_config =
                     IndexDocumentsConfig { autogenerate_docids: true, ..Default::default() };
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
                 let documents =
                     utils::documents_from(datasets_paths::SMOL_WIKI_ARTICLES_1_2, "csv");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
@@ -594,9 +678,15 @@ fn indexing_wiki_in_three_batches(c: &mut Criterion) {
                 let indexing_config =
                     IndexDocumentsConfig { autogenerate_docids: true, ..Default::default() };
                 let mut wtxn = index.write_txn().unwrap();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
 
                 let documents =
                     utils::documents_from(datasets_paths::SMOL_WIKI_ARTICLES_3_4, "csv");
@@ -606,9 +696,15 @@ fn indexing_wiki_in_three_batches(c: &mut Criterion) {
 
                 let indexing_config =
                     IndexDocumentsConfig { autogenerate_docids: true, ..Default::default() };
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
 
                 let documents =
                     utils::documents_from(datasets_paths::SMOL_WIKI_ARTICLES_4_4, "csv");
@@ -646,9 +742,15 @@ fn indexing_movies_default(c: &mut Criterion) {
                 let config = IndexerConfig::default();
                 let indexing_config = IndexDocumentsConfig::default();
                 let mut wtxn = index.write_txn().unwrap();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
 
                 let documents = utils::documents_from(datasets_paths::MOVIES, "json");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
@@ -683,9 +785,15 @@ fn reindexing_movies_default(c: &mut Criterion) {
                 let config = IndexerConfig::default();
                 let indexing_config = IndexDocumentsConfig::default();
                 let mut wtxn = index.write_txn().unwrap();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
 
                 let documents = utils::documents_from(datasets_paths::MOVIES, "json");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
@@ -699,9 +807,15 @@ fn reindexing_movies_default(c: &mut Criterion) {
                 let config = IndexerConfig::default();
                 let indexing_config = IndexDocumentsConfig::default();
                 let mut wtxn = index.write_txn().unwrap();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
 
                 let documents = utils::documents_from(datasets_paths::MOVIES, "json");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
@@ -738,9 +852,15 @@ fn deleting_movies_in_batches_default(c: &mut Criterion) {
                 let config = IndexerConfig::default();
                 let mut wtxn = index.write_txn().unwrap();
                 let indexing_config = IndexDocumentsConfig::default();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
                 let documents = utils::documents_from(datasets_paths::MOVIES, "json");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
                 user_error.unwrap();
@@ -794,9 +914,15 @@ fn indexing_movies_in_three_batches(c: &mut Criterion) {
                 // as we don't care about the time it takes.
                 let config = IndexerConfig::default();
                 let indexing_config = IndexDocumentsConfig::default();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
 
                 let documents = utils::documents_from(datasets_paths::MOVIES_1_2, "json");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
@@ -811,9 +937,15 @@ fn indexing_movies_in_three_batches(c: &mut Criterion) {
                 let config = IndexerConfig::default();
                 let indexing_config = IndexDocumentsConfig::default();
                 let mut wtxn = index.write_txn().unwrap();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
 
                 let documents = utils::documents_from(datasets_paths::MOVIES_3_4, "json");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
@@ -821,9 +953,15 @@ fn indexing_movies_in_three_batches(c: &mut Criterion) {
                 builder.execute().unwrap();
 
                 let indexing_config = IndexDocumentsConfig::default();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
 
                 let documents = utils::documents_from(datasets_paths::MOVIES_4_4, "json");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
@@ -883,9 +1021,15 @@ fn indexing_nested_movies_default(c: &mut Criterion) {
                 let config = IndexerConfig::default();
                 let indexing_config = IndexDocumentsConfig::default();
                 let mut wtxn = index.write_txn().unwrap();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
 
                 let documents = utils::documents_from(datasets_paths::NESTED_MOVIES, "json");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
@@ -945,9 +1089,15 @@ fn deleting_nested_movies_in_batches_default(c: &mut Criterion) {
                 let config = IndexerConfig::default();
                 let mut wtxn = index.write_txn().unwrap();
                 let indexing_config = IndexDocumentsConfig::default();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
                 let documents = utils::documents_from(datasets_paths::NESTED_MOVIES, "json");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
                 user_error.unwrap();
@@ -1008,9 +1158,15 @@ fn indexing_nested_movies_without_faceted_fields(c: &mut Criterion) {
                 let config = IndexerConfig::default();
                 let indexing_config = IndexDocumentsConfig::default();
                 let mut wtxn = index.write_txn().unwrap();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
 
                 let documents = utils::documents_from(datasets_paths::NESTED_MOVIES, "json");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
@@ -1046,9 +1202,15 @@ fn indexing_geo(c: &mut Criterion) {
                 let config = IndexerConfig::default();
                 let indexing_config = IndexDocumentsConfig::default();
                 let mut wtxn = index.write_txn().unwrap();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
 
                 let documents = utils::documents_from(datasets_paths::SMOL_ALL_COUNTRIES, "jsonl");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
@@ -1084,9 +1246,15 @@ fn reindexing_geo(c: &mut Criterion) {
                 let config = IndexerConfig::default();
                 let indexing_config = IndexDocumentsConfig::default();
                 let mut wtxn = index.write_txn().unwrap();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
 
                 let documents = utils::documents_from(datasets_paths::SMOL_ALL_COUNTRIES, "jsonl");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
@@ -1101,9 +1269,15 @@ fn reindexing_geo(c: &mut Criterion) {
                 let config = IndexerConfig::default();
                 let indexing_config = IndexDocumentsConfig::default();
                 let mut wtxn = index.write_txn().unwrap();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
 
                 let documents = utils::documents_from(datasets_paths::SMOL_ALL_COUNTRIES, "jsonl");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
@@ -1141,9 +1315,15 @@ fn deleting_geo_in_batches_default(c: &mut Criterion) {
                 let config = IndexerConfig::default();
                 let mut wtxn = index.write_txn().unwrap();
                 let indexing_config = IndexDocumentsConfig::default();
-                let builder =
-                    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ())
-                        .unwrap();
+                let builder = IndexDocuments::new(
+                    &mut wtxn,
+                    &index,
+                    &config,
+                    indexing_config,
+                    |_| (),
+                    || false,
+                )
+                .unwrap();
                 let documents = utils::documents_from(datasets_paths::SMOL_ALL_COUNTRIES, "jsonl");
                 let (builder, user_error) = builder.add_documents(documents).unwrap();
                 user_error.unwrap();
diff --git a/benchmarks/benches/utils.rs b/benchmarks/benches/utils.rs
index a240ce299..511b3b8d5 100644
--- a/benchmarks/benches/utils.rs
+++ b/benchmarks/benches/utils.rs
@@ -86,7 +86,7 @@ pub fn base_setup(conf: &Conf) -> Index {
 
     (conf.configure)(&mut builder);
 
-    builder.execute(|_| ()).unwrap();
+    builder.execute(|_| (), || false).unwrap();
     wtxn.commit().unwrap();
 
     let config = IndexerConfig::default();
@@ -96,7 +96,8 @@ pub fn base_setup(conf: &Conf) -> Index {
         update_method: IndexDocumentsMethod::ReplaceDocuments,
         ..Default::default()
     };
-    let builder = IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ()).unwrap();
+    let builder =
+        IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| (), || false).unwrap();
     let documents = documents_from(conf.dataset, conf.dataset_format);
     let (builder, user_error) = builder.add_documents(documents).unwrap();
     user_error.unwrap();
diff --git a/cli/src/main.rs b/cli/src/main.rs
index a633e9fa7..dd5489ebc 100644
--- a/cli/src/main.rs
+++ b/cli/src/main.rs
@@ -239,7 +239,7 @@ impl Performer for DocumentAddition {
         if let Some(primary) = self.primary {
             let mut builder = update::Settings::new(&mut txn, &index, &config);
             builder.set_primary_key(primary);
-            builder.execute(|_| ()).unwrap();
+            builder.execute(|_| (), || false).unwrap();
         }
 
         let indexing_config = IndexDocumentsConfig {
@@ -260,6 +260,7 @@ impl Performer for DocumentAddition {
             &config,
             indexing_config,
             |step| indexing_callback(step, &bars),
+            || false,
         )
         .unwrap();
         let (addition, user_error) = addition.add_documents(reader)?;
@@ -517,7 +518,7 @@ impl Performer for SettingsUpdate {
             bars.push(bar);
         }
 
-        update.execute(|step| indexing_callback(step, &bars))?;
+        update.execute(|step| indexing_callback(step, &bars), || false)?;
 
         txn.commit()?;
         Ok(())
diff --git a/milli/src/error.rs b/milli/src/error.rs
index d3f0a179f..bd691ab1d 100644
--- a/milli/src/error.rs
+++ b/milli/src/error.rs
@@ -56,6 +56,8 @@ pub enum InternalError {
     Store(#[from] MdbError),
     #[error(transparent)]
     Utf8(#[from] str::Utf8Error),
+    #[error("An indexation process was explicitly aborted.")]
+    AbortedIndexation,
 }
 
 #[derive(Error, Debug)]
diff --git a/milli/src/index.rs b/milli/src/index.rs
index 7c5e92d05..63568e3b0 100644
--- a/milli/src/index.rs
+++ b/milli/src/index.rs
@@ -1188,6 +1188,7 @@ pub(crate) mod tests {
     use tempfile::TempDir;
 
     use crate::documents::DocumentsBatchReader;
+    use crate::error::{Error, InternalError};
     use crate::index::{DEFAULT_MIN_WORD_LEN_ONE_TYPO, DEFAULT_MIN_WORD_LEN_TWO_TYPOS};
     use crate::update::{self, IndexDocuments, IndexDocumentsConfig, IndexerConfig, Settings};
     use crate::{db_snap, Index};
@@ -1237,6 +1238,7 @@ pub(crate) mod tests {
                 &self.indexer_config,
                 self.index_documents_config.clone(),
                 |_| (),
+                || false,
             )
             .unwrap();
             let (builder, user_error) = builder.add_documents(documents).unwrap();
@@ -1273,11 +1275,45 @@ pub(crate) mod tests {
         ) -> Result<(), crate::error::Error> {
             let mut builder = update::Settings::new(wtxn, &self.inner, &self.indexer_config);
             update(&mut builder);
-            builder.execute(drop)?;
+            builder.execute(drop, || false)?;
             Ok(())
         }
     }
 
+    #[test]
+    fn aborting_indexation() {
+        use std::sync::atomic::AtomicBool;
+        use std::sync::atomic::Ordering::Relaxed;
+
+        let index = TempIndex::new();
+        let mut wtxn = index.inner.write_txn().unwrap();
+
+        let should_abort = AtomicBool::new(false);
+        let builder = IndexDocuments::new(
+            &mut wtxn,
+            &index.inner,
+            &index.indexer_config,
+            index.index_documents_config.clone(),
+            |_| (),
+            || should_abort.load(Relaxed),
+        )
+        .unwrap();
+
+        let (builder, user_error) = builder
+            .add_documents(documents!([
+                { "id": 1, "name": "kevin" },
+                { "id": 2, "name": "bob", "age": 20 },
+                { "id": 2, "name": "bob", "age": 20 },
+            ]))
+            .unwrap();
+        user_error.unwrap();
+
+        should_abort.store(true, Relaxed);
+        let err = builder.execute().unwrap_err();
+
+        assert!(matches!(err, Error::InternalError(InternalError::AbortedIndexation)));
+    }
+
     #[test]
     fn initial_field_distribution() {
         let index = TempIndex::new();
diff --git a/milli/src/search/distinct/mod.rs b/milli/src/search/distinct/mod.rs
index 1a9c56cf3..b6ed26917 100644
--- a/milli/src/search/distinct/mod.rs
+++ b/milli/src/search/distinct/mod.rs
@@ -89,7 +89,7 @@ mod test {
         let config = IndexerConfig::default();
         let mut update = Settings::new(&mut txn, &index, &config);
         update.set_distinct_field(distinct.to_string());
-        update.execute(|_| ()).unwrap();
+        update.execute(|_| (), || false).unwrap();
 
         // add documents to the index
         let config = IndexerConfig::default();
@@ -98,7 +98,8 @@ mod test {
             ..Default::default()
         };
         let addition =
-            IndexDocuments::new(&mut txn, &index, &config, indexing_config, |_| ()).unwrap();
+            IndexDocuments::new(&mut txn, &index, &config, indexing_config, |_| (), || false)
+                .unwrap();
 
         let reader =
             crate::documents::DocumentsBatchReader::from_reader(Cursor::new(JSON.as_slice()))
diff --git a/milli/src/update/index_documents/mod.rs b/milli/src/update/index_documents/mod.rs
index 10a831ddf..a121d3ae0 100644
--- a/milli/src/update/index_documents/mod.rs
+++ b/milli/src/update/index_documents/mod.rs
@@ -32,7 +32,7 @@ pub use self::helpers::{
 use self::helpers::{grenad_obkv_into_chunks, GrenadParameters};
 pub use self::transform::{Transform, TransformOutput};
 use crate::documents::{obkv_to_object, DocumentsBatchReader};
-use crate::error::UserError;
+use crate::error::{Error, InternalError, UserError};
 pub use crate::update::index_documents::helpers::CursorClonableMmap;
 use crate::update::{
     self, IndexerConfig, PrefixWordPairsProximityDocids, UpdateIndexingStep, WordPrefixDocids,
@@ -70,13 +70,14 @@ impl Default for IndexDocumentsMethod {
     }
 }
 
-pub struct IndexDocuments<'t, 'u, 'i, 'a, F> {
+pub struct IndexDocuments<'t, 'u, 'i, 'a, FP, FA> {
     wtxn: &'t mut heed::RwTxn<'i, 'u>,
     index: &'i Index,
     config: IndexDocumentsConfig,
     indexer_config: &'a IndexerConfig,
     transform: Option<Transform<'a, 'i>>,
-    progress: F,
+    progress: FP,
+    should_abort: FA,
     added_documents: u64,
 }
 
@@ -90,17 +91,19 @@ pub struct IndexDocumentsConfig {
     pub autogenerate_docids: bool,
 }
 
-impl<'t, 'u, 'i, 'a, F> IndexDocuments<'t, 'u, 'i, 'a, F>
+impl<'t, 'u, 'i, 'a, FP, FA> IndexDocuments<'t, 'u, 'i, 'a, FP, FA>
 where
-    F: Fn(UpdateIndexingStep) + Sync,
+    FP: Fn(UpdateIndexingStep) + Sync,
+    FA: Fn() -> bool + Sync,
 {
     pub fn new(
         wtxn: &'t mut heed::RwTxn<'i, 'u>,
         index: &'i Index,
         indexer_config: &'a IndexerConfig,
         config: IndexDocumentsConfig,
-        progress: F,
-    ) -> Result<IndexDocuments<'t, 'u, 'i, 'a, F>> {
+        progress: FP,
+        should_abort: FA,
+    ) -> Result<IndexDocuments<'t, 'u, 'i, 'a, FP, FA>> {
         let transform = Some(Transform::new(
             wtxn,
             index,
@@ -114,6 +117,7 @@ where
             config,
             indexer_config,
             progress,
+            should_abort,
             wtxn,
             index,
             added_documents: 0,
@@ -148,12 +152,13 @@ where
             Err(user_error) => return Ok((self, Err(user_error))),
         };
 
-        let indexed_documents = self
-            .transform
-            .as_mut()
-            .expect("Invalid document addition state")
-            .read_documents(enriched_documents_reader, self.wtxn, &self.progress)?
-            as u64;
+        let indexed_documents =
+            self.transform.as_mut().expect("Invalid document addition state").read_documents(
+                enriched_documents_reader,
+                self.wtxn,
+                &self.progress,
+                &self.should_abort,
+            )? as u64;
 
         self.added_documents += indexed_documents;
 
@@ -197,7 +202,8 @@ where
     #[logging_timer::time("IndexDocuments::{}")]
     pub fn execute_raw(self, output: TransformOutput) -> Result<u64>
     where
-        F: Fn(UpdateIndexingStep) + Sync,
+        FP: Fn(UpdateIndexingStep) + Sync,
+        FA: Fn() -> bool + Sync,
     {
         let TransformOutput {
             primary_key,
@@ -346,6 +352,10 @@ where
         });
 
         for result in lmdb_writer_rx {
+            if (self.should_abort)() {
+                return Err(Error::InternalError(InternalError::AbortedIndexation));
+            }
+
             let typed_chunk = match result? {
                 TypedChunk::WordDocids { word_docids_reader, exact_word_docids_reader } => {
                     let cloneable_chunk = unsafe { as_cloneable_grenad(&word_docids_reader)? };
@@ -422,17 +432,26 @@ where
         word_position_docids: Option<grenad::Reader<CursorClonableMmap>>,
     ) -> Result<()>
     where
-        F: Fn(UpdateIndexingStep) + Sync,
+        FP: Fn(UpdateIndexingStep) + Sync,
+        FA: Fn() -> bool + Sync,
     {
         // Merged databases are already been indexed, we start from this count;
         let mut databases_seen = MERGED_DATABASE_COUNT;
 
+        if (self.should_abort)() {
+            return Err(Error::InternalError(InternalError::AbortedIndexation));
+        }
+
         databases_seen += 1;
         (self.progress)(UpdateIndexingStep::MergeDataIntoFinalDatabase {
             databases_seen,
             total_databases: TOTAL_POSTING_DATABASE_COUNT,
         });
 
+        if (self.should_abort)() {
+            return Err(Error::InternalError(InternalError::AbortedIndexation));
+        }
+
         let previous_words_prefixes_fst =
             self.index.words_prefixes_fst(self.wtxn)?.map_data(|cow| cow.into_owned())?;
 
@@ -446,6 +465,10 @@ where
         }
         builder.execute()?;
 
+        if (self.should_abort)() {
+            return Err(Error::InternalError(InternalError::AbortedIndexation));
+        }
+
         let current_prefix_fst = self.index.words_prefixes_fst(self.wtxn)?;
 
         // We retrieve the common words between the previous and new prefix word fst.
@@ -473,6 +496,10 @@ where
             total_databases: TOTAL_POSTING_DATABASE_COUNT,
         });
 
+        if (self.should_abort)() {
+            return Err(Error::InternalError(InternalError::AbortedIndexation));
+        }
+
         if let Some(word_docids) = word_docids {
             execute_word_prefix_docids(
                 self.wtxn,
@@ -499,6 +526,10 @@ where
             )?;
         }
 
+        if (self.should_abort)() {
+            return Err(Error::InternalError(InternalError::AbortedIndexation));
+        }
+
         databases_seen += 1;
         (self.progress)(UpdateIndexingStep::MergeDataIntoFinalDatabase {
             databases_seen,
@@ -521,6 +552,10 @@ where
             )?;
         }
 
+        if (self.should_abort)() {
+            return Err(Error::InternalError(InternalError::AbortedIndexation));
+        }
+
         databases_seen += 1;
         (self.progress)(UpdateIndexingStep::MergeDataIntoFinalDatabase {
             databases_seen,
@@ -548,6 +583,10 @@ where
             )?;
         }
 
+        if (self.should_abort)() {
+            return Err(Error::InternalError(InternalError::AbortedIndexation));
+        }
+
         databases_seen += 1;
         (self.progress)(UpdateIndexingStep::MergeDataIntoFinalDatabase {
             databases_seen,
diff --git a/milli/src/update/index_documents/transform.rs b/milli/src/update/index_documents/transform.rs
index 3786c5bcb..7c9a912b3 100644
--- a/milli/src/update/index_documents/transform.rs
+++ b/milli/src/update/index_documents/transform.rs
@@ -138,15 +138,17 @@ impl<'a, 'i> Transform<'a, 'i> {
         })
     }
 
-    pub fn read_documents<R, F>(
+    pub fn read_documents<R, FP, FA>(
         &mut self,
         reader: EnrichedDocumentsBatchReader<R>,
         wtxn: &mut heed::RwTxn,
-        progress_callback: F,
+        progress_callback: FP,
+        should_abort: FA,
     ) -> Result<usize>
     where
         R: Read + Seek,
-        F: Fn(UpdateIndexingStep) + Sync,
+        FP: Fn(UpdateIndexingStep) + Sync,
+        FA: Fn() -> bool + Sync,
     {
         let (mut cursor, fields_index) = reader.into_cursor_and_fields_index();
 
@@ -165,6 +167,10 @@ impl<'a, 'i> Transform<'a, 'i> {
         while let Some(enriched_document) = cursor.next_enriched_document()? {
             let EnrichedDocument { document, document_id } = enriched_document;
 
+            if should_abort() {
+                return Err(Error::InternalError(InternalError::AbortedIndexation));
+            }
+
             // drop_and_reuse is called instead of .clear() to communicate to the compiler that field_buffer
             // does not keep references from the cursor between loop iterations
             let mut field_buffer_cache = drop_and_reuse(field_buffer);
diff --git a/milli/src/update/settings.rs b/milli/src/update/settings.rs
index b3b1420f8..f82a57cbc 100644
--- a/milli/src/update/settings.rs
+++ b/milli/src/update/settings.rs
@@ -266,9 +266,15 @@ impl<'a, 't, 'u, 'i> Settings<'a, 't, 'u, 'i> {
         self.pagination_max_total_hits = Setting::Reset;
     }
 
-    fn reindex<F>(&mut self, cb: &F, old_fields_ids_map: FieldsIdsMap) -> Result<()>
+    fn reindex<FP, FA>(
+        &mut self,
+        progress_callback: &FP,
+        should_abort: &FA,
+        old_fields_ids_map: FieldsIdsMap,
+    ) -> Result<()>
     where
-        F: Fn(UpdateIndexingStep) + Sync,
+        FP: Fn(UpdateIndexingStep) + Sync,
+        FA: Fn() -> bool + Sync,
     {
         let fields_ids_map = self.index.fields_ids_map(self.wtxn)?;
         // if the settings are set before any document update, we don't need to do anything, and
@@ -302,7 +308,8 @@ impl<'a, 't, 'u, 'i> Settings<'a, 't, 'u, 'i> {
             self.index,
             self.indexer_config,
             IndexDocumentsConfig::default(),
-            &cb,
+            &progress_callback,
+            &should_abort,
         )?;
         indexing_builder.execute_raw(output)?;
 
@@ -657,9 +664,10 @@ impl<'a, 't, 'u, 'i> Settings<'a, 't, 'u, 'i> {
         Ok(())
     }
 
-    pub fn execute<F>(mut self, progress_callback: F) -> Result<()>
+    pub fn execute<FP, FA>(mut self, progress_callback: FP, should_abort: FA) -> Result<()>
     where
-        F: Fn(UpdateIndexingStep) + Sync,
+        FP: Fn(UpdateIndexingStep) + Sync,
+        FA: Fn() -> bool + Sync,
     {
         self.index.set_updated_at(self.wtxn, &OffsetDateTime::now_utc())?;
 
@@ -695,7 +703,7 @@ impl<'a, 't, 'u, 'i> Settings<'a, 't, 'u, 'i> {
             || searchable_updated
             || exact_attributes_updated
         {
-            self.reindex(&progress_callback, old_fields_ids_map)?;
+            self.reindex(&progress_callback, &should_abort, old_fields_ids_map)?;
         }
 
         Ok(())
diff --git a/milli/tests/search/distinct.rs b/milli/tests/search/distinct.rs
index 64dd16f09..c2b7e2c1e 100644
--- a/milli/tests/search/distinct.rs
+++ b/milli/tests/search/distinct.rs
@@ -19,7 +19,7 @@ macro_rules! test_distinct {
             let config = milli::update::IndexerConfig::default();
             let mut builder = Settings::new(&mut wtxn, &index, &config);
             builder.set_distinct_field(S(stringify!($distinct)));
-            builder.execute(|_| ()).unwrap();
+            builder.execute(|_| (), || false).unwrap();
             wtxn.commit().unwrap();
 
             let rtxn = index.read_txn().unwrap();
diff --git a/milli/tests/search/facet_distribution.rs b/milli/tests/search/facet_distribution.rs
index 83d692d7f..e2f89f2db 100644
--- a/milli/tests/search/facet_distribution.rs
+++ b/milli/tests/search/facet_distribution.rs
@@ -23,13 +23,14 @@ fn test_facet_distribution_with_no_facet_values() {
         S("genres"),
         S("tags"),
     });
-    builder.execute(|_| ()).unwrap();
+    builder.execute(|_| (), || false).unwrap();
 
     // index documents
     let config = IndexerConfig { max_memory: Some(10 * 1024 * 1024), ..Default::default() };
     let indexing_config = IndexDocumentsConfig { autogenerate_docids: true, ..Default::default() };
 
-    let builder = IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ()).unwrap();
+    let builder =
+        IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| (), || false).unwrap();
     let mut documents_builder = DocumentsBatchBuilder::new(Vec::new());
     let reader = Cursor::new(
         r#"{
diff --git a/milli/tests/search/mod.rs b/milli/tests/search/mod.rs
index 4ec1aeb83..c8b01648c 100644
--- a/milli/tests/search/mod.rs
+++ b/milli/tests/search/mod.rs
@@ -57,13 +57,14 @@ pub fn setup_search_index_with_criteria(criteria: &[Criterion]) -> Index {
         S("america") => vec![S("the united states")],
     });
     builder.set_searchable_fields(vec![S("title"), S("description")]);
-    builder.execute(|_| ()).unwrap();
+    builder.execute(|_| (), || false).unwrap();
 
     // index documents
     let config = IndexerConfig { max_memory: Some(10 * 1024 * 1024), ..Default::default() };
     let indexing_config = IndexDocumentsConfig { autogenerate_docids: true, ..Default::default() };
 
-    let builder = IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ()).unwrap();
+    let builder =
+        IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| (), || false).unwrap();
     let mut documents_builder = DocumentsBatchBuilder::new(Vec::new());
     let reader = Cursor::new(CONTENT.as_bytes());
 
diff --git a/milli/tests/search/query_criteria.rs b/milli/tests/search/query_criteria.rs
index f873f56f7..90b4d6362 100644
--- a/milli/tests/search/query_criteria.rs
+++ b/milli/tests/search/query_criteria.rs
@@ -345,7 +345,7 @@ fn criteria_mixup() {
         let mut wtxn = index.write_txn().unwrap();
         let mut builder = Settings::new(&mut wtxn, &index, &config);
         builder.set_criteria(criteria.iter().map(ToString::to_string).collect());
-        builder.execute(|_| ()).unwrap();
+        builder.execute(|_| (), || false).unwrap();
         wtxn.commit().unwrap();
 
         let mut rtxn = index.read_txn().unwrap();
@@ -385,12 +385,13 @@ fn criteria_ascdesc() {
         S("name"),
         S("age"),
     });
-    builder.execute(|_| ()).unwrap();
+    builder.execute(|_| (), || false).unwrap();
 
     // index documents
     let config = IndexerConfig { max_memory: Some(10 * 1024 * 1024), ..Default::default() };
     let indexing_config = IndexDocumentsConfig { autogenerate_docids: true, ..Default::default() };
-    let builder = IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| ()).unwrap();
+    let builder =
+        IndexDocuments::new(&mut wtxn, &index, &config, indexing_config, |_| (), || false).unwrap();
 
     let mut batch_builder = DocumentsBatchBuilder::new(Vec::new());
 
@@ -436,7 +437,7 @@ fn criteria_ascdesc() {
         let mut wtxn = index.write_txn().unwrap();
         let mut builder = Settings::new(&mut wtxn, &index, &config);
         builder.set_criteria(vec![criterion.to_string()]);
-        builder.execute(|_| ()).unwrap();
+        builder.execute(|_| (), || false).unwrap();
         wtxn.commit().unwrap();
 
         let mut rtxn = index.read_txn().unwrap();
diff --git a/milli/tests/search/typo_tolerance.rs b/milli/tests/search/typo_tolerance.rs
index 7dc6b0c4f..c939186e5 100644
--- a/milli/tests/search/typo_tolerance.rs
+++ b/milli/tests/search/typo_tolerance.rs
@@ -40,7 +40,7 @@ fn test_typo_tolerance_one_typo() {
     let config = IndexerConfig::default();
     let mut builder = Settings::new(&mut txn, &index, &config);
     builder.set_min_word_len_one_typo(4);
-    builder.execute(|_| ()).unwrap();
+    builder.execute(|_| (), || false).unwrap();
 
     // typo is now supported for 4 letters words
     let mut search = Search::new(&txn, &index);
@@ -86,7 +86,7 @@ fn test_typo_tolerance_two_typo() {
     let config = IndexerConfig::default();
     let mut builder = Settings::new(&mut txn, &index, &config);
     builder.set_min_word_len_two_typos(7);
-    builder.execute(|_| ()).unwrap();
+    builder.execute(|_| (), || false).unwrap();
 
     // typo is now supported for 4 letters words
     let mut search = Search::new(&txn, &index);
@@ -127,7 +127,8 @@ fn test_typo_disabled_on_word() {
     let mut txn = index.write_txn().unwrap();
     let config = IndexerConfig::default();
     let indexing_config = IndexDocumentsConfig::default();
-    let builder = IndexDocuments::new(&mut txn, &index, &config, indexing_config, |_| ()).unwrap();
+    let builder =
+        IndexDocuments::new(&mut txn, &index, &config, indexing_config, |_| (), || false).unwrap();
 
     let (builder, user_error) = builder.add_documents(documents).unwrap();
     user_error.unwrap();
@@ -156,7 +157,7 @@ fn test_typo_disabled_on_word() {
     // `zealand` doesn't allow typos anymore
     exact_words.insert("zealand".to_string());
     builder.set_exact_words(exact_words);
-    builder.execute(|_| ()).unwrap();
+    builder.execute(|_| (), || false).unwrap();
 
     let mut search = Search::new(&txn, &index);
     search.query("zealand");
@@ -194,7 +195,7 @@ fn test_disable_typo_on_attribute() {
     let mut builder = Settings::new(&mut txn, &index, &config);
     // disable typos on `description`
     builder.set_exact_attributes(vec!["description".to_string()].into_iter().collect());
-    builder.execute(|_| ()).unwrap();
+    builder.execute(|_| (), || false).unwrap();
 
     let mut search = Search::new(&txn, &index);
     search.query("antebelum");