move read guard around instead of copying it

2 files changed, 3 insertions, 3 deletions

diff --git a/searchlib/src/vespa/searchlib/tensor/hnsw_index.cpp b/searchlib/src/vespa/searchlib/tensor/hnsw_index.cpp
index f236d525a9a..2a17378f58a 100644
--- a/searchlib/src/vespa/searchlib/tensor/hnsw_index.cpp
+++ b/searchlib/src/vespa/searchlib/tensor/hnsw_index.cpp
@@ -299,7 +299,7 @@ HnswIndex::internal_prepare_add(uint32_t docid, TypedCells input_vector, vespali
 {
     // TODO: Add capping on num_levels
     int level = _level_generator->max_level();
-    PreparedAddDoc op(docid, level, read_guard);
+    PreparedAddDoc op(docid, level, std::move(read_guard));
     auto entry = _graph.get_entry_node();
     if (entry.docid == 0) {
         // graph has no entry point
@@ -380,7 +380,7 @@ HnswIndex::prepare_add_document(uint32_t docid,
         // to ensure they are linked together:
         return std::unique_ptr<PrepareResult>();
     }
-    PreparedAddDoc op = internal_prepare_add(docid, vector, read_guard);
+    PreparedAddDoc op = internal_prepare_add(docid, vector, std::move(read_guard));
     return std::make_unique<PreparedAddDoc>(std::move(op));
 }
 
diff --git a/searchlib/src/vespa/searchlib/tensor/hnsw_index.h b/searchlib/src/vespa/searchlib/tensor/hnsw_index.h
index 6acf269507d..f9adef0b86c 100644
--- a/searchlib/src/vespa/searchlib/tensor/hnsw_index.h
+++ b/searchlib/src/vespa/searchlib/tensor/hnsw_index.h
@@ -134,7 +134,7 @@ protected:
         std::vector<Links> connections;
         PreparedAddDoc(uint32_t docid_in, int32_t max_level_in, ReadGuard read_guard_in)
           : docid(docid_in), max_level(max_level_in),
-            read_guard(read_guard_in),
+            read_guard(std::move(read_guard_in)),
             connections(max_level+1)
         {}
         ~PreparedAddDoc() = default;