The coroutines are regular threads. The library provides an interface for syncing which makes them behave as if they were "real" coroutines. This avoids common problems you run into when making coroutines in C++ which by itself does not support coroutines natively - but it supports threads very well.
Pros: Very easy to implement and use. Will likely work very well anywhere without much thought.
Cons: Resource hungry. Not really designed for thousands of simultaneous coroutines.
The coroutines are regular threads. The library provides an interface for syncing which makes them behave as if they were "real" coroutines. This avoids common problems you run into when making coroutines in C++ which by itself does not support coroutines natively - but it supports threads very well.
Pros: Very easy to implement and use. Will likely work very well anywhere without much thought.
Cons: Resource hungry. Not really designed for thousands of simultaneous coroutines.