ActorScript(TM) extension of C sharp (TM), Java(TM), and Objective C(TM): iAdaptive(TM) concurrency for antiCloud(TM) privacy and security

Message passing using types is the foundation of system communication:  Messages are the unit of communication  Types enable secure communication Actors ActorScript™ is a general purpose programming language for implementing iAdaptive TM concurrency that manages resources and demand. It is differentiated from previous languages by the following:  Universality o Ability to directly specify exactly what Actors can and cannot do o Everything is accomplished with message passing using types including the very definition of ActorScript itself. Application binary interfaces are afforded so that no program symbol need be looked up at runtime. Functional, Imperative, Logic, and Concurrent programs are integrated.  A type in ActorScript is an interface that does not name its implementations (contra to object-oriented programming languages beginning with Simula that name implementations called " classes " that are types). ActorScript can send a message to any Actor for which it has an (imported) type. 2 o Concurrency can be dynamically adapted to resources available and current load.  Safety, security and readability o Programs are extension invariant, i.e., extending a program does not change the meaning of the program that is extended. o Applications cannot directly harm each other. o Variable races are eliminated while allowing flexible concurrency. o Lexical singleness of purpose. Each syntactic token is used for exactly one purpose.  Performance i o Imposes no overhead on implementation of Actor systems in the sense that ActorScript programs are as efficient as the same implementation in machine code. For example, message passing has essentially same overhead as procedure calls and looping. o Execution dynamically adjusted for system load and capacity (e.g. cores) o Locality because execution is not bound by a sequential global memory model o Inherent concurrency because execution is not limited by being restricted to communicating sequential processes o Minimize latency along critical paths ActorScript attempts to achieve the highest level of performance, scalability, and expressibility with a minimum of primitives. 1 Introduction ActorScript is based on the Actor mathematical model of computation that treats " Actors " as the universal primitives of concurrent digital computation i Performance can be tricky as illustrated by the following:  " Those who would forever give up correctness for a little temporary performance deserve neither correctness nor performance. " [Philips 2013]  " The key to performance is elegance, not battalions of special cases " [John Bentley]  " If you want to …