diff options
Diffstat (limited to 'src/t_zset.c')
| -rw-r--r-- | src/t_zset.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/t_zset.c b/src/t_zset.c index 91fe01d76..16ec715e8 100644 --- a/src/t_zset.c +++ b/src/t_zset.c @@ -249,6 +249,11 @@ int zslDelete(zskiplist *zsl, double score, sds ele, zskiplistNode **node) { * This function does not update the score in the hash table side, the * caller should take care of it. * + * Note that this function attempts to just update the node, in case after + * the score update, the node would be exactly at the same position. + * Otherwise the skiplist is modified by removing and re-adding a new + * element, which is more costly. + * * The function returns the updated element skiplist node pointer. */ zskiplistNode *zslUpdateScore(zskiplist *zsl, double curscore, sds ele, double newscore) { zskiplistNode *update[ZSKIPLIST_MAXLEVEL], *x; |