Expand description
Receiver backends with different performance and memory tradeoffs.
Three backends behind the same ReceiverBackend trait:
| Fast | Lite | Packed | |
|---|---|---|---|
| OOO insert | O(1) | O(WIN) | O(1) |
| Delivery | O(1) advance | O(REASM) shift | O(MSG) copy |
| Per-segment use | MTU (fixed) | MTU (fixed) | payload len |
| Static memory | WIN×MTU + REASM | REASM | BUF + REASM |
ReceiverMachine is a type alias for PackedReceiver.