[erlang-questions] How performant is ets:select ?

[Max Lapshin]

It depends on the size of your table and access rate.

We have a 'sessions' table in Flussonic, it is accessed several times on
each request (up to several thousands per second).
There is a strict rule: we NEVER make select on it, because it is bad. So
we have to make secondary indexes on it.

Other tables allow to make select on them.
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