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There is no much gain of using coroutines with blocking API. Coroutines are designed to simplify the use of _asynchronous_ (non-blocking APIs). Blocking APIs are already easy-to-use w/o any coroutines. However, async APIs are a pain to use w/o coroutines, and that is where they help. However, if you want consistency (make all your code coroutine-based), then you shall configure your coroutines thread pool in the same way as before (`CommonPool` is not appropriate for doing blocking stuff)