Description: Lazy execution is a programming concept that refers to the technique of postponing the evaluation of an expression until its value is actually needed. This approach allows for optimizing program performance by avoiding unnecessary calculations and reducing resource usage. Instead of calculating all values immediately, lazy execution enables the program to run more efficiently by evaluating only those parts of the code that are required at a given moment. This technique is particularly useful in handling large data structures or in functional programming, where chains of operations can be constructed that are evaluated only when the final result is needed. Lazy execution can also facilitate the creation of more readable and maintainable programs, as it allows developers to structure their code in a way that focuses on the logic of data flow rather than on the sequence of execution. In various programming languages, lazy execution can be implemented through features that enable building data streams that are processed deferentially.
