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https://issues.apache.org/jira/browse/DISPATCH-244?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15986531#comment-15986531
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Chuck Rolke commented on DISPATCH-244:
--------------------------------------
Another reference point:
>From the GDB stack trace Dispatch code enters Proton code at call frame #17,
>Proton code enters Cyrus Sasl code at frame #12. Instrumenting the entry into
>sasl_server_new() yields:
{noformat}
[Switching to Thread 0x7fc421ffb700 (LWP 1836)]
Thu Apr 27 08:22:48 EDT 2017
Entering sasl_server_new()
Thu Apr 27 08:22:53 EDT 2017
Exited sasl_server_new(). result=0
{noformat}
So the entire five seconds was spent in sasl_server_new().
> SASL library generates un-necessary DNS and LDAP requests
> ---------------------------------------------------------
>
> Key: DISPATCH-244
> URL: https://issues.apache.org/jira/browse/DISPATCH-244
> Project: Qpid Dispatch
> Issue Type: Bug
> Components: Tests
> Affects Versions: 0.5
> Reporter: Alan Conway
> Assignee: Alan Conway
> Attachments: A-perf-flamegraph-3075-work.svg,
> dispatch-244-gdb-backtrace.txt
>
>
> The dispatch system tests (e.g. system_tests_management) run very slowly when
> connected to a VPN.
> - about 10x slower on VPN configured to use TCP connection
> - about 5x slower on VPN configured for UDP connection
> Wireshark shows unexpected LDAP and DNS queries on the VPN interface.
> `wallace` below is the local host name, but is not mentioned in any tests so
> must be picked up by proton or dispatch at runtime:
> {code}
> 1 0.000000000 10.3.113.108 10.11.6.1 LDAP 242
> searchRequest(11) "dc=redhat,dc=com" wholeSubtree
> 2 0.035161000 10.3.113.108 10.5.30.160 DNS 72
> Standard query 0xd03f A wallace.lab.bos.redhat.com
> {code}
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