alt Hacker News"As a rule of thumb, if your application never has 10,000 virtual threads or more, it is unlikely to benefit from virtual threads."
https://docs.oracle.com/en/java/javase/21/core/virtual-threa...
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pdimitar • today at 2:16 AM
Obviously. But it's really nice to have the option, and none of us knows the future. I've been bitten by those "0.1% chance" things much more times than I would be not-embarrassed to admit, and I know I a not alone.
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BEAM threads are kinda magicsauce tho, instructions have a cost and after a certain cost total (quantums) the scheduler can divert to another virt thread to guarantee forward progress. Also the immutability rules etc make it easier to optimize this switching.