* src/lisp.h: Add comment (Bug#31996#25).

diff --git a/src/lisp.h b/src/lisp.h
index cf7b8c0ebc5ea1b2e31a4bebac7ea2336e370c6e..6203a746a308c322200b96fb85dcb54375b1d22d 100644 (file)
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -3050,6 +3050,8 @@ enum specbind_tag {
 
 union specbinding
   {
+    /* Aligning similar members consistently might help efficiency slightly
+       (Bug#31996#25).  */
     ENUM_BF (specbind_tag) kind : CHAR_BIT;
     struct {
       ENUM_BF (specbind_tag) kind : CHAR_BIT;