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vim-patch:8.0.1590: padding in list type wastes memory (#9119)

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Problem:    Padding in list type wastes memory.
Solution:   Reorder struct members to optimize padding. (Dominique Pelle,
            closes vim/vim#2704)
1a84024037
This commit is contained in:
Jan Edmund Lazo 2018-10-13 13:56:20 -04:00 committed by Justin M. Keyes
parent bddcbbb571
commit 824f36a980
1 changed files with 6 additions and 5 deletions
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11
src/nvim/eval/typval.h
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@ -162,19 +162,20 @@ struct listwatch_S {
};
/// 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; ///< Index of a cached item, used for optimising repeated l[idx].
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().
VarLockStatus 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; ///< Index of a cached item, used for optimising repeated l[idx].
int lv_copyID; ///< ID used by deepcopy().
VarLockStatus lv_lock; ///< Zero, VAR_LOCKED, VAR_FIXED.
};
// Static list with 10 items. Use tv_list_init_static10() to initialize.