[stefs]

i'd be interested in this too. my guess: virtual threads are slightly more memory efficient and slightly faster, but same ballpark.

[stefs]

now that i think about it i'm pretty sure my guess is completely wrong. memory usage (and thus concurrent-inactives) might be similar, but i expect the virtual threads to be much more efficient.

[stefs]

except if you use the appropriate non-blocking methods! with blocking io, kotlin coroutines are just running in a thread pool.