O(L + (N-K)log(N)) worst case where L is the total number of elements in all the sets, N is the size of the first set, and K is the size of the result set.
ACL categories:
@read,@sortedset,@slow,
This command is similar to ZDIFFSTORE, but instead of storing the resulting
sorted set, it is returned to the client.
Examples
Return information
Array reply: the result of the difference including, optionally, scores when the WITHSCORES option is used.
Array reply: the result of the difference including, optionally, scores when the WITHSCORES option is used.