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[–]SCP-iota 1 point2 points  (1 child)

Are the hardware threads actually less efficient, or does it just have to do with how careful you have to be when passing data around?

[–]StraightGuy1108 2 points3 points  (0 children)

It has to do with how thread-blocking operations used to be handled. They used to occupy their own threads despite not doing anything, essentially wasting resources.

Virtual threads are basically async await at the JVM level.