When do you use ETS?

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1

Hello!
I’m a beginner engineer of elixir. One day I found my coworker used ETS for managing something like user states. But ETS table is deleted when a process which generated the table ends.

So I’d like to know when to use ETS and its merit.

2

Please take a look at the thread: Why use ETS? When not to use it?
there are multiple brilliant answers.

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3

Thank you.