Dispatchers — Akka Documentation
Dispatchers are responsible for scheduling all code that run inside the ActorSystem. Dispatchers are one of the most important parts of Akka.NET, as they control the throughput and time share for each of the actors, giving each one a fair share of resources.
mailbox, threadpoolの紐付けとメッセージハンドリングのロジックを行うイメージ
Akkaのシステムの中でも最も重要なところ。