[erlang-questions] mnesia question - fastest way to tell if ordered_set table is empty or not
Sun Jun 16 21:14:12 CEST 2013
What is the fastest way, avoiding locking, to tell if an ordered_set
mnesia table is empty or not? I'm assuming that if the table is not an
ordered set, then:
mnesia:activity(ets, fun mnesia:first/1, [Table]) == '$end_of_table'
is the fastest. However, if the table is an ordered set, this seems
like it could take O(logN) time.
Would this be faster?:
mnesia:activity(ets, fun mnesia:table_info/2, [Table, size]) == 0
Is there a faster alternative?
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