Scala: Why are Actors lightweight?

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Published on 2010-03-13T17:27:25Z Indexed on 2010/03/13 17:35 UTC
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Forgive me if this is a stupid question, but what makes actors so lightweight?

To be honest, I'm not even sure how they work. Aren't they separate threads?

'Seems I have two questions. Thanks in advance :)

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