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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DISPATCH-1389) Optimize the parsing of message annotations
Date Tue, 23 Jul 2019 15:12:00 GMT

    [ https://issues.apache.org/jira/browse/DISPATCH-1389?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16891121#comment-16891121

ASF GitHub Bot commented on DISPATCH-1389:

kgiusti commented on pull request #541: DISPATCH-1389: optimize the STATE_IN_BODY codepath
in qd_iterator_octet
URL: https://github.com/apache/qpid-dispatch/pull/541#discussion_r306376031

 File path: src/iterator.c
 @@ -555,8 +555,33 @@ void qd_iterator_annotate_space(qd_iterator_t *iter, const char* space,
int spac
 unsigned char qd_iterator_octet(qd_iterator_t *iter)
-    if (!iter)
-        return 0;
+    assert(iter);
 Review comment:
   yeah, was hoping to save a bit there, but look like the rest of the api verifies the iter
pointer, so I'll add it back
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> Optimize the parsing of message annotations
> -------------------------------------------
>                 Key: DISPATCH-1389
>                 URL: https://issues.apache.org/jira/browse/DISPATCH-1389
>             Project: Qpid Dispatch
>          Issue Type: Improvement
>            Reporter: Ken Giusti
>            Assignee: Ken Giusti
>            Priority: Major
> Parsing message annotations, especially on the inter router incoming link, are quite
> For example, in a simple standalone router test the time it takes on average (on my puny
laptop) to receive a message and hand it off to the core is ~1 usec:
> TestRouterA: link MyReceiver count=500000 rx=1.094 
> Compare that time to the same operation performed on the inbound router link on a two-hop
router configuration:
> TestRouterB: link MyReceiver count=500000 rx=7.035 
> On average it's 7x slower.  Most of this time appears to be spent manipulating inbound
message annotations.
> This Jira tracks work towards improving the performance of message annotation processing.

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