"Instant speed" is not a standardized term in any specific field. It's likely a phrase used in a specific context that wasn't provided.

To better understand what "instant speed" means, please provide more context:

* Where did you encounter this term? (A book, a game, a conversation, etc.)

* What was the context of the discussion? What was being talked about before "instant speed" was mentioned?

* What is the subject matter? Is it about physics, computers, magic, etc.?

With more information, I can help you understand what "instant speed" might refer to.