What is Backpressure?

In the world of software development, backpressure is a communication signal sent from a data consumer (the part of the system receiving information) back to a data producer (the part sending it) to tell it to slow down. It occurs when the receiver is being overwhelmed with more data than it can process at that moment. Instead of letting the system crash or run out of memory, backpressure acts as a safety valve to keep the data flow manageable.

The Fast-Food Kitchen Analogy

To understand backpressure, imagine a busy fast-food restaurant. You have a chef (the producer) and a cashier (the consumer). The chef can flip burgers incredibly fast—let's say ten burgers every minute. However, the cashier can only bag the burgers and hand them to customers at a rate of three burgers per minute.

If the chef keeps cooking at full speed, burgers will start piling up on the counter.…