Christopher L. Shannon created AMQ-6158:
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Summary: Computing message size for a durable subscription is very
slow
Key: AMQ-6158
URL: https://issues.apache.org/jira/browse/AMQ-6158
Project: ActiveMQ
Issue Type: Bug
Components: Broker, KahaDB
Affects Versions: 5.13.0
Reporter: Christopher L. Shannon
Assignee: Christopher L. Shannon
AMQ-5923 added a new feature to compute the pending message size for a durable
subscription. The problem is that the current algorithm used in KahaDB to
iterate over the pending messages for a subscription runs in O(n^2) because it
uses the wrong index (location index) to compute the size.
Now that AMQ-6097 has been resolved so that the order index contains size
information for messages as well, we can rewrite the algorithm to be O(n) which
will make this run significantly faster for large pending message sizes (such
as 100k messages, etc)
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