(I my real code, the runBlocking are processed from a method.invoke to "wait", that why I can' t use suspend functions there) - How can I avoid this unexpected behvior?

what is the desired behavior? You want to execute launch block 1 and 2 sequentially ?

no, in parallel (of course here the implementation is simplified and do not have suspended functions, so it won't be the case)

so you want parallel with interleaving results?

yes

async{op1} async{op2} async1.await asyn2.await. Should do it?

It's not possible in my implementation due to the complexity of the code. But my issue has been solved by using launch(Dispatcher.IO)

ok. A note tho, you should not rely in the apparent order of execution. Launching two coroutines and expecting multiple interchangeable results with a specific order cannot be guaranteed

Thx. I understand that.

@myanmarking he is not relying on order. He is expecting the shorter delay to finish first

ya, but you don’t have any guarantees. I am assuming the delay is some kind of computation