Execution model

An execution model in [computer programming] defines how a program’s instructions are processed and executed by a computer. It specifies the behavior of the elements of a programming language, and determines the order in which operations are performed.

An execution model helps in understanding how a computer program will behave when its code is compiled and executed.

Execution models may be sequential or parallel. In a sequential execution model, instructions are executed one after the other, in the order in which they appear in the code. In a parallel execution model, multiple instructions may be executed simultaneously.

Parallel execution models are made possible by [multi-threaded] and distributed computing environments.