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From Michael Dürig (JIRA) <j...@apache.org>
Subject [jira] [Created] (OAK-175) MemoryNodeStateBuilder inefficient for large child node lists
Date Mon, 09 Jul 2012 19:01:35 GMT
Michael Dürig created OAK-175:

             Summary: MemoryNodeStateBuilder inefficient for large child node lists
                 Key: OAK-175
                 URL: https://issues.apache.org/jira/browse/OAK-175
             Project: Jackrabbit Oak
          Issue Type: Improvement
          Components: core
            Reporter: Michael Dürig

OAK-174 leverages the {{getChildBuilder()}} method introduced with OAK-170. This revealed
a performance issue for large child node list with the {{MemoryNodeStateBuilder}} implementation:
without additional measures (see below) {{RootImplTest.largeChildList()}} is very slow. 

The additional measures I currently implemented consist of counting the overall number of
changes to a tree and purge these down to the branch when a certain threshold is reached.
See {{RootImpl.purge()}}. However, I think this mechanism is too ad-hoc and we should find
a more general solution.

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