How does Rust implement backpressure in streaming architectures?

Backpressure is a flow-control mechanism that prevents producers from overwhelming consumers. In async systems, it is commonly enforced through bounded queues/channels and task suspension.

When producers generate data faster than consumers can process it, queues begin to grow. Without backpressure, this can lead to:

Backpressure forces producers to slow down, wait, drop data, or reduce throughput when downstream components become saturated.

Common implementations include: