internal processing
Computing term for operations handled inside a system, program, or device, as opposed to external or user-visible processing.
This software has fast internal processing.
The details of the internal processing are not visible to the user.
外部処理 refers to external processing, often involving outside systems or user interaction, while 内部処理 is internal.
Compound of 内部 (internal) and 処理 (processing). A straightforward technical term.