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https://issues.apache.org/jira/browse/CAY-1976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14239125#comment-14239125
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ASF GitHub Bot commented on CAY-1976:
-------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/cayenne/pull/46
> Slow performance of DbMerger
> ----------------------------
>
> Key: CAY-1976
> URL: https://issues.apache.org/jira/browse/CAY-1976
> Project: Cayenne
> Issue Type: Bug
> Affects Versions: 4.0.M2
> Reporter: Andrus Adamchik
> Assignee: Andrus Adamchik
> Fix For: 4.0.M2
>
>
> This is a consequence of CAY-1946 refactoring. DbMerger applies
> "includeTableName" only after full reverse-engineering of the DB. So on
> databases with lots of system tables invoking DbMerger.createMergeTokens(..)
> becomes prohibitively slow. This is visible with MergeCase subclasses when
> running unit tests on PostgreSQL and Oracle.
> E.g. on PostgreSQL 'mvn clean verify' that previously took ~2 min on my
> laptop, is now taking 1 hour. On Oracle I could not even finish the test run.
> There is actually a TODO in DbMerger, line 178:
> if (!includeTableName(tableName)) {
> // TODO we have to cut this entities in db loader
> // TODO log
> continue;
> }
> We need to address this one.
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