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https://issues.apache.org/jira/browse/DISPATCH-2251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17418787#comment-17418787
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ASF subversion and git services commented on DISPATCH-2251:
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Commit 607b75106a049dc98867beb858d2ac1d556c4855 in qpid-dispatch's branch
refs/heads/main from Ken Giusti
[ https://gitbox.apache.org/repos/asf?p=qpid-dispatch.git;h=607b751 ]
DISPATCH-2251: simple optimization of qd_compose_insert_string_iterator
This closes #1374
> optimize qd_compose_insert_string_iterator
> ------------------------------------------
>
> Key: DISPATCH-2251
> URL: https://issues.apache.org/jira/browse/DISPATCH-2251
> Project: Qpid Dispatch
> Issue Type: Improvement
> Components: Router Node
> Affects Versions: 1.17.0
> Reporter: Ken Giusti
> Assignee: Ken Giusti
> Priority: Trivial
> Fix For: 1.18.0
>
> Attachments: qdr_perf_worker_134462_134462.svg,
> qdr_perf_worker_38506_38506.svg
>
>
> Analysis of perf data for the receive path of a inter-router connection
> downstream router shows that qd_compose_insert_string_iterator calls are
> expensive. This is due to the way qd_compose_insert_string_iterator copies
> data from the iterator: byte by byte.
> Refactoring qd_compose_insert_string_iterator to use qd_iterator_copy and
> qd_compose_insert_string_n will leverage memmove semantics and will improve
> performance (see attached flamegraphs: 134462 current vs 38506 w/optimization)
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