vim-patch:7.4.349

Problem:    When there are matches to highlight the whole window is redrawn,
            which is slow.
Solution:   Only redraw everything when lines were inserted or deleted.
            Reset b_mod_xlines when needed.  (Alexey Radkov)

https://code.google.com/p/vim/source/detail?r=v7-4-349

src/nvim/screen.c

@@ -1356,8 +1356,9 @@ static void win_update(win_T *wp)
                               (foldmethodIsSyntax(wp)
                                && hasAnyFolding(wp)) ||
                               syntax_check_changed(lnum)))
-                        /* match in fixed position might need redraw */
+                        // match in fixed position might need redraw
-                        ||  wp->w_match_head != NULL
+                        // if lines were inserted or deleted
+                        || (wp->w_match_head != NULL && buf->b_mod_xlines != 0)
                         ))))) {
       if (lnum == mod_top)
         top_to_mod = FALSE;

src/nvim/version.c

@@ -246,7 +246,7 @@ static int included_patches[] = {
   352,
   //351,
   //350,
-  //349,
+  349,
   348,
   //347,
   346,

src/nvim/window.c

@@ -5323,12 +5323,13 @@ int match_add(win_T *wp, char_u *grp, char_u *pat, int prio, int id, list_T *pos
           wp->w_buffer->b_mod_bot = botlnum;
         }
       } else {
+        wp->w_buffer->b_mod_set = TRUE;
         wp->w_buffer->b_mod_top = toplnum;
         wp->w_buffer->b_mod_bot = botlnum;
+        wp->w_buffer->b_mod_xlines = 0;
       }
       m->pos.toplnum = toplnum;
       m->pos.botlnum = botlnum;
-      wp->w_buffer->b_mod_set = TRUE;
       rtype = VALID;
     }
   }
@@ -5396,10 +5397,11 @@ int match_delete(win_T *wp, int id, int perr)
         wp->w_buffer->b_mod_bot = cur->pos.botlnum;
       }
     } else {
+      wp->w_buffer->b_mod_set = TRUE;
       wp->w_buffer->b_mod_top = cur->pos.toplnum;
       wp->w_buffer->b_mod_bot = cur->pos.botlnum;
+      wp->w_buffer->b_mod_xlines = 0;
     }
-    wp->w_buffer->b_mod_set = TRUE;
     rtype = VALID;
   }
   free(cur);