How does NumberFormat/DecimalFormat impact performance or memory usage?

NumberFormat and DecimalFormat are Java classes that allow for customizable number formatting. However, their use can impact performance and memory usage, especially in applications that process large volumes of data or require frequent formatting operations.

While these classes provide flexibility and ease of use, they involve some overhead as they are relatively heavy compared to simple number manipulations. They create new instances and manage locale-specific rules, which can lead to increased memory consumption and slower runtime if not used judiciously.