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…llback When a stream used up its cached send window, the write loop registered a pending-write callback and waited, even if the peer's MAX_STREAM_DATA had already raised the QUIC window. That cost an extra event loop iteration before the rest of the data went out. The loop now re-queries the window first and only defers to notifyPendingWriteOnStream if the stream is still blocked. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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lgtm!! I'm working on a stack of diffs that changes/adds a new QuicSocket::writeChain that returns the flow control available which would achieve this as well |
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When a stream used up its cached send window, the write loop registered a pending-write callback and waited, even if the peer's MAX_STREAM_DATA had already raised the QUIC window. That cost an extra event loop iteration before the rest of the data went out. The loop now re-queries the window first and only defers to notifyPendingWriteOnStream if the stream is still blocked.