real-timetester

noun
UK /ˈrɪəl taɪm ˈtɛstə/
US /ˈriːəl taɪm ˈtɛstər/

A real-time tester is a tool that checks something right away as it happens.

The real-timetester showed the game's speed while we played it.


OTHER MEANINGS

2. A person who tests systems live while they are running.

The real-timetester watched the screens for any errors during the show.

3. A program that gives results immediately without waiting.

Our real-timetester flagged the bug the moment it appeared.

4. A device that measures performance as events happen.

The real-timetester recorded the car's speed every second.