Clifford Jansen created PROTON-2857:
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Summary: Improve performance of session flow control for senders.
Key: PROTON-2857
URL: https://issues.apache.org/jira/browse/PROTON-2857
Project: Qpid Proton
Issue Type: Improvement
Components: proton-c
Affects Versions: proton-c-0.39.0
Reporter: Clifford Jansen
Assignee: Clifford Jansen
Attachments: test-drain.c, test-sender.c
The current interaction of pn_link_send and transfer frame generation results
in many needless buffer rotate calls that are costly.
The attached test programs (courtesy of kgiusti) shine a bright light on the
problem. In this case a single 40MB message results in 76 buffer rotates and
5GB of individual 8 bit byte moves that are all busy work.
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