Where do you usually store data temporarily saved during processing?

In iOS, for temporary storage of data needed only during processing, the following are usually used:

• Memory in RAM (variables, object properties) — the fastest and simplest method.
• UserDefaults — for small settings and data that need to be saved between app launches, but not suitable for large or sensitive data.
• Temporary files — if the data is large and needs to be stored on disk temporarily, the NSTemporaryDirectory() directory can be used.
• Cache memory — for example, URLCache or custom cache solutions for temporary storage of downloaded data.

Most often, for temporary data needed only during runtime, it is enough to store them in variables or object properties. If you need to save data between sessions, use UserDefaults or temporary files.