In which scenario would a fast field update be most beneficial?

A fast field update is particularly advantageous in scenarios where updates to the triggering record are needed before the record is saved. This mechanism allows for immediate updates within the context of the process without the overhead of a full save operation, which can improve system performance and flow execution.

By utilizing a fast field update, administrators can modify field values instantly when the record is processed, ensuring that necessary changes reflect before any additional processes or rules are triggered. This can be crucial for maintaining data integrity and ensuring that subsequent logic and actions rely on the most current information.

In other scenarios, such as executing external requests or performing batch updates, those situations require a different approach, as they involve complex operations that are not suited to the rapid execution model of fast field updates. Similarly, processes that run after a record is saved depend on the completion of all save operations and thus are not applicable to the benefits offered by a fast field update.