In Haskell, which uses lazy evaluation by default, Call Forcing can be explicitly triggered using certain constructs like seq or $!. These constructs force the evaluation of their arguments to Weak Head Normal Form (WHNF) or Normal Form (NF) before proceeding with further computation. WHNF represents a partially evaluated expression where the outermost data constructor has been evaluated, while NF indicates a fully evaluated expression with no remaining unevaluated thunks. By forcing evaluation, developers can control the evaluation order and potentially avoid space leaks or unnecessary memory usage in their programs.

One common scenario where Call Forcing is beneficial is in handling recursive functions with accumulating parameters. In such cases, lazy evaluation might lead to a build-up of unevaluated thunks, causing memory overhead and potential performance issues. By explicitly forcing the evaluation of intermediate results, developers can make sure that memory usage remains bounded and the computation progresses efficiently. However, it’s important to use Call Forcing judiciously, as excessive use can lead to unnecessary strictness, sacrificing the benefits of lazy evaluation such as potential performance optimizations and improved modularity.