What are memory models in functional programming languages?

What are memory models in functional programming languages?

Memory models in functional programming define how data is stored, accessed, and modified in a program. They ensure that the behavior of programs is predictable and consistent, especially in concurrent environments.

Can you explain how immutability affects memory models?

Immutability means that once a data structure is created, it cannot be changed. This simplifies memory models as it eliminates side effects, making reasoning about code easier and enhancing concurrency.

What are some examples of functional languages with unique memory models?

Languages like Haskell and Erlang have unique memory models. Haskell uses lazy evaluation and immutability, while Erlang's model is designed for concurrent processes with message passing.

How do memory models impact performance in functional languages?

Memory models can significantly impact performance. For instance, immutability can lead to increased memory usage due to the creation of new data structures, but it can also enhance safety and concurrency.