patch 8.0.1590: padding in list type wastes memory
Problem: Padding in list type wastes memory.
Solution: Reorder struct members to optimize padding. (Dominique Pelle,
closes #2704)
diff --git a/src/structs.h b/src/structs.h
index 6979dbc..7dc732c 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -1260,21 +1260,22 @@
/*
* Structure to hold info about a list.
+ * Order of members is optimized to reduce padding.
*/
struct listvar_S
{
listitem_T *lv_first; /* first item, NULL if none */
listitem_T *lv_last; /* last item, NULL if none */
- int lv_refcount; /* reference count */
- int lv_len; /* number of items */
listwatch_T *lv_watch; /* first watcher, NULL if none */
- int lv_idx; /* cached index of an item */
listitem_T *lv_idx_item; /* when not NULL item at index "lv_idx" */
- int lv_copyID; /* ID used by deepcopy() */
list_T *lv_copylist; /* copied list used by deepcopy() */
- char lv_lock; /* zero, VAR_LOCKED, VAR_FIXED */
list_T *lv_used_next; /* next list in used lists list */
list_T *lv_used_prev; /* previous list in used lists list */
+ int lv_refcount; /* reference count */
+ int lv_len; /* number of items */
+ int lv_idx; /* cached index of an item */
+ int lv_copyID; /* ID used by deepcopy() */
+ char lv_lock; /* zero, VAR_LOCKED, VAR_FIXED */
};
/*