fix: use nconc instead of cl-sort due to performance

rg-result.el

@@ -475,7 +475,7 @@ This function is called from `compilation-filter-hook'."
                          t t)
           (push (cons (copy-marker (match-beginning 0))
                       (length (match-string 0)))
-                rg-match-positions)
+                temp-positions)
           (cl-incf rg-hit-count))
         (rg-format-line-and-column-numbers beg end)
 
@@ -484,12 +484,10 @@ This function is called from `compilation-filter-hook'."
         (while (re-search-forward "\033\\[[0-9;]*[0mK]" end 1)
           (replace-match "" t t))
 
-        (setq rg-match-positions
-              (cl-sort rg-match-positions
-                       (lambda(x y)
-                         (< (marker-position x) (marker-position y)))
-                       :key #'car))
         (goto-char beg)
+
+        (setq rg-match-positions (nconc rg-match-positions (nreverse temp-positions)))
+
         (run-hooks 'rg-filter-hook)))))
 
 ;; The regexp and filter functions below were taken from ag.el