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https://issues.apache.org/jira/browse/PROTON-1984?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16717800#comment-16717800
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Andrew Stitcher commented on PROTON-1984:
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This can be fixed by changing the pni_data_traverse interface so that node
indices are passed to the enter and exit functions rather than nodes. It is a
simple O(1) operation to get the node from the index.
> [c] pn_data_inspect has order n^2 running time
> ----------------------------------------------
>
> Key: PROTON-1984
> URL: https://issues.apache.org/jira/browse/PROTON-1984
> Project: Qpid Proton
> Issue Type: Bug
> Components: proton-c
> Reporter: Andrew Stitcher
> Assignee: Andrew Stitcher
> Priority: Major
>
> pni_node_index which is used in a couple of places to find out the index of a
> node inside a pn_data_t has a run time that is linear in the size of the
> level of the pn_data_t it is at.
> pni_inspect_enter and pni_inspect_exit which are called for every node in the
> pn_data_t when traversing it using pn_data_inspect use pni_node_index. This
> means that the overall time complexity is n^2 in the size of any embedded
> compound data structure (array, list, map).
> So for large compound data structures this can take an extremely long time.
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