When are QLCs much less efficient?

Question

In practice, Query List Comprehensions seem to be fine for all uses of Mnesia and ets/dets tables. Are there any operations (or types of operation) that are significantly more efficient than their QLC equivalents?

(I'm thinking along the lines of the answer in Which is more expensive to the RAM, A query list comprehension, or a mnesia index_read?)

Answer 1

For large data sets I'm using mnesia:select (http://www.erlang.org/doc/man/mnesia.html#select-2). In my tests it works 1.5 time faster than same QLC queries.