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Posted to commits@asyncband.apache.org by "tisonkun (via GitHub)" <gi...@apache.org> on 2026/09/09 10:59:58 UTC
[PR] refactor(mpsc): simplify unbounded channel coordination [asyncband]
tisonkun opened a new pull request, #293:
URL: https://github.com/apache/asyncband/pull/293
## Summary
- Keep unbounded MPSC endpoint state under one mutex and replace receiver waker registration retries with a linear path. Preserve receiver-local batches, FIFO, cancellation, and incremental storage reclamation while removing the spare-segment cache.
- Organize sender and receiver definitions with their implementations, clarify delivery and disconnection contracts, and consolidate ordering coverage at the public API boundary.
- Add `cargo x bench --no-run` and use it in required CI. Local `cargo x bench` continues to run benchmarks on demand.
Validation: `cargo x test` (499 passed), `cargo x check`, `cargo x lint`, `cargo x bench --no-run`, and Miri for MPSC and unbounded storage with four scheduling seeds. Independent review found no actionable issues.
## Design Notes
The receiver still consumes its local batch without locking. Sender clone/drop now uses the shared mutex: local M4 Max measurements show about 5.5 ns additional cost per clone/drop pair and 1 ns per ready send/receive pair. Scheduled scalar batches were roughly unchanged; eight busy-polling producers were 12% slower, while eight-producer inline 1 KiB bursts were 13% faster. These are five-round local medians across 16 representative cases, with concurrent scheduling noise, rather than performance guarantees.
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Re: [PR] refactor: simplify unbounded MPSC and consolidate validation [asyncband]
Posted by "tisonkun (via GitHub)" <gi...@apache.org>.
tisonkun merged PR #293:
URL: https://github.com/apache/asyncband/pull/293
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