diff --git a/source/blender/makesrna/intern/rna_path.cc b/source/blender/makesrna/intern/rna_path.cc
index 4b3da0764c1..eefda8e3c5c 100644
--- a/source/blender/makesrna/intern/rna_path.cc
+++ b/source/blender/makesrna/intern/rna_path.cc
@@ -1098,7 +1098,13 @@ static char *rna_path_from_ptr_to_property_index_ex(
   }
   else {
     if (is_rna) {
-      path = BLI_sprintfN("%s%s", propname, index_str);
+      if (index_dim == 0) {
+        /* Use direct duplication instead of #BLI_sprintfN because it's faster. */
+        path = BLI_strdup(propname);
+      }
+      else {
+        path = BLI_sprintfN("%s%s", propname, index_str);
+      }
     }
     else {
       char propname_esc[MAX_IDPROP_NAME * 2];