[mikmoila]

One at a time, not concurrently.

[Tainnor]

so what's the point? we can already write blocking code. The reason why people want to use reactive frameworks is because they don't want to block threads just because some I/O is happening.

[geodel]

Point is exactly you can block because blocking is cheap with virtual thread and can have 100's of thousand block calls with exhausting all system resources. VT takes few KBs of memory instead of few MBs of memory, so plentiful of VT is a feature. With this one can write plain blocking code get benefit of async scalability but with simple APIs structure and debuggable sync code.

[mikmoila]

Nima uses virtual threads where blocking call blocks only the current virtual thread but not the underlying carrier-thread, which can run another virtual thread while waiting i/o to complete.