diff --git a/milli/src/update/index_documents/transform.rs b/milli/src/update/index_documents/transform.rs
index 04c9e9256..65007aa32 100644
--- a/milli/src/update/index_documents/transform.rs
+++ b/milli/src/update/index_documents/transform.rs
@@ -122,7 +122,7 @@ impl<'a, 'i> Transform<'a, 'i> {
         // We initialize the sorter with the user indexing settings.
         let original_sorter = create_sorter(
             grenad::SortAlgorithm::Stable,
-            merge_function.clone(),
+            merge_function,
             indexer_settings.chunk_compression_type,
             indexer_settings.chunk_compression_level,
             indexer_settings.max_nb_chunks,
diff --git a/milli/src/update/new/channel.rs b/milli/src/update/new/channel.rs
index 237581cb3..d9823096e 100644
--- a/milli/src/update/new/channel.rs
+++ b/milli/src/update/new/channel.rs
@@ -518,7 +518,7 @@ impl DocumentSender<'_> {
 impl Drop for DocumentSender<'_> {
     fn drop(&mut self) {
         if let Some(sender) = self.0.take() {
-            sender.send(MergerOperation::FinishedDocument);
+            let _ = sender.send(MergerOperation::FinishedDocument);
         }
     }
 }
diff --git a/milli/src/update/new/extract/mod.rs b/milli/src/update/new/extract/mod.rs
index d1f6bb787..6e60a4063 100644
--- a/milli/src/update/new/extract/mod.rs
+++ b/milli/src/update/new/extract/mod.rs
@@ -58,7 +58,7 @@ pub mod perm_json_p {
         seeker: &mut impl FnMut(&str, &Value) -> Result<()>,
     ) -> Result<()> {
         if value.is_empty() {
-            seeker(&base_key, &Value::Object(Map::with_capacity(0)))?;
+            seeker(base_key, &Value::Object(Map::with_capacity(0)))?;
         }
 
         for (key, value) in value.iter() {
@@ -103,7 +103,7 @@ pub mod perm_json_p {
         seeker: &mut impl FnMut(&str, &Value) -> Result<()>,
     ) -> Result<()> {
         if values.is_empty() {
-            seeker(&base_key, &Value::Array(vec![]))?;
+            seeker(base_key, &Value::Array(vec![]))?;
         }
 
         for value in values {
@@ -128,10 +128,10 @@ pub mod perm_json_p {
     ) -> bool {
         selectors.map_or(true, |selectors| {
             selectors.iter().any(|selector| {
-                contained_in(selector, &field_name) || contained_in(&field_name, selector)
+                contained_in(selector, field_name) || contained_in(field_name, selector)
             })
         }) && !skip_selectors.iter().any(|skip_selector| {
-            contained_in(skip_selector, &field_name) || contained_in(&field_name, skip_selector)
+            contained_in(skip_selector, field_name) || contained_in(field_name, skip_selector)
         })
     }
 }
diff --git a/milli/src/update/new/extract/searchable/tokenize_document.rs b/milli/src/update/new/extract/searchable/tokenize_document.rs
index d2795114e..fda619013 100644
--- a/milli/src/update/new/extract/searchable/tokenize_document.rs
+++ b/milli/src/update/new/extract/searchable/tokenize_document.rs
@@ -48,7 +48,7 @@ impl<'a> DocumentTokenizer<'a> {
                     .entry(field_id)
                     .and_modify(|counter| *counter += MAX_DISTANCE)
                     .or_insert(0);
-                if *position as u32 >= self.max_positions_per_attributes {
+                if *position >= self.max_positions_per_attributes {
                     return Ok(());
                 }
 
@@ -72,7 +72,7 @@ impl<'a> DocumentTokenizer<'a> {
                             *position,
                             self.tokenizer.tokenize_with_allow_list(text.as_str(), locales),
                         )
-                        .take_while(|(p, _)| (*p as u32) < self.max_positions_per_attributes);
+                        .take_while(|(p, _)| *p < self.max_positions_per_attributes);
 
                         for (index, token) in tokens {
                             // keep a word only if it is not empty and fit in a LMDB key.
diff --git a/milli/src/update/new/indexer/document_operation.rs b/milli/src/update/new/indexer/document_operation.rs
index f088370fb..572ea8528 100644
--- a/milli/src/update/new/indexer/document_operation.rs
+++ b/milli/src/update/new/indexer/document_operation.rs
@@ -2,7 +2,7 @@ use std::borrow::Cow;
 use std::collections::{BTreeMap, HashMap};
 use std::sync::Arc;
 
-use heed::types::{Bytes, DecodeIgnore};
+use heed::types::Bytes;
 use heed::RoTxn;
 use memmap2::Mmap;
 use rayon::iter::{IndexedParallelIterator, IntoParallelIterator, ParallelIterator};
diff --git a/milli/src/update/new/indexer/mod.rs b/milli/src/update/new/indexer/mod.rs
index 5187e4f4c..57821c51a 100644
--- a/milli/src/update/new/indexer/mod.rs
+++ b/milli/src/update/new/indexer/mod.rs
@@ -6,7 +6,7 @@ pub use document_deletion::DocumentDeletion;
 pub use document_operation::DocumentOperation;
 use heed::{RoTxn, RwTxn};
 pub use partial_dump::PartialDump;
-use rayon::iter::{IndexedParallelIterator, IntoParallelIterator, ParallelIterator};
+use rayon::iter::{IndexedParallelIterator, IntoParallelIterator};
 use rayon::ThreadPool;
 pub use update_by_function::UpdateByFunction;
 
@@ -229,7 +229,8 @@ fn extract_and_send_docids<E: DocidsExtractor, D: MergerOperationType>(
     sender: &ExtractorSender,
 ) -> Result<()> {
     let merger = E::run_extraction(index, fields_ids_map, indexer, document_changes)?;
-    Ok(sender.send_searchable::<D>(merger).unwrap())
+    sender.send_searchable::<D>(merger).unwrap();
+    Ok(())
 }
 
 /// Returns the primary key *field id* that has already been set for this index or the
diff --git a/milli/src/update/new/indexer/partial_dump.rs b/milli/src/update/new/indexer/partial_dump.rs
index 5f8743e31..43a89c46c 100644
--- a/milli/src/update/new/indexer/partial_dump.rs
+++ b/milli/src/update/new/indexer/partial_dump.rs
@@ -1,4 +1,4 @@
-use rayon::iter::{IndexedParallelIterator, ParallelBridge, ParallelIterator};
+use rayon::iter::IndexedParallelIterator;
 
 use super::DocumentChanges;
 use crate::documents::{DocumentIdExtractionError, PrimaryKey};