--- deliantra/server/common/map.C	2007/01/01 12:28:45	1.64
+++ deliantra/server/common/map.C	2007/01/01 21:19:51	1.65
@@ -489,6 +489,8 @@
 bool
 maptile::save_objects (object_freezer &freezer, int flags)
 {
+  static int cede_count = 0;
+
   if (flags & IO_HEADER)
     save_header (freezer);
 
@@ -497,9 +499,18 @@
 
   for (int i = 0; i < size (); ++i)
     {
+      if (cede_count >= 500)
+        {
+          cede_count = 0;
+          coroapi::cede ();
+        }
+
       int unique = 0;
       for (object *op = spaces [i].bot; op; op = op->above)
         {
+          // count per-object, but cede only when modification-safe
+          cede_count++;
+
           if (op->flag [FLAG_UNIQUE] && op->flag [FLAG_IS_FLOOR])
             unique = 1;