Both RUDP socket readers returned None after consuming a packet that carried
no frame or event for the caller: an acknowledgement, a ping, a fragment
that completed nothing yet. A caller that polls once per send therefore read
one incoming datagram per outgoing one, and fell behind its peer's
acknowledgements as soon as a reliable channel shared the session; every
unacknowledged packet was then resent, and the resends starved the sends.
Measured on the media path 2026-09-10: 7 video frames in 9 s with reliable
audio on, 266 without. Readers now consume no-event packets and keep
reading; None means the socket is empty.
The client no longer acknowledges unreliable frames. They carry no sequence,
so the ACK told the sender nothing and cost it one datagram to read for
every one it sent.
The fragment-set bound test now asserts eviction, which is what the bound
has done since the fuse was cut earlier today; the old assertion was hiding
behind a truncated test run.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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