perf: rrf code (#5559)

packages/global/core/dataset/search/utils.ts

@@ -64,9 +64,7 @@ export const datasetSearchResultConcat = (
       });
     }
 
-    return {
+    const { rrfScore: _, ...result } = item;
-      ...item,
+    return result;
-      rrfScore: undefined
-    };
   });
 };