High‐performance extended actors

Abstract Actors are a popular mechanism for indirectly expressing concurrency. This article examines an implementation in the concurrent dialect of C ++, which runs actors on shared‐memory multi‐processor computers. The ++ actor system targets 32–256+ multi‐core computers that form backbone high‐performance computing, rather than distributed communication or robust execution via parentage fallback used by other systems. Five new mechanisms presented to achieve expressibility, robustness, high performance, and scalability applications across multiple cores: explicit life time (storage management) messages, combining coroutines, forward message‐trace backward message‐return debugging failures, promise call‐back ask sends, inverts execution‐model decoupling mailboxes with levels sharding. Microbenchmarks compare features CAF, Protoactor, classic typed Akka.