Presumably the Lambda host takes care off spinning...

# coroutines

[sitepodmatt]

Presumably the Lambda host takes care off spinning up as many threads as required (= number of concurrent requests at any one time), so using runblocking (and its default dispatcher) your basically putting an event loop in each thread to service that request https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines/run-blocking.html so it's fine