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Posted to dev@lucene.apache.org by "Sven Amann (JIRA)" <ji...@apache.org> on 2018/09/05 11:39:00 UTC
[jira] [Created] (SOLR-12736) Parallel Iteration of Lists
Sven Amann created SOLR-12736:
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Summary: Parallel Iteration of Lists
Key: SOLR-12736
URL: https://issues.apache.org/jira/browse/SOLR-12736
Project: Solr
Issue Type: Task
Security Level: Public (Default Security Level. Issues are Public)
Affects Versions: master (8.0)
Reporter: Sven Amann
Solr/contrib/analysis-extras contains the class `BooleanWeight`, which maintains two lists that are repeatedly iterated over in parallel. While both lists do have the same length, this is not immediately obvious from the locations the iterate them. A future change may lead to the lists getting our of sync, which would break the iterations. Moreover, there is no established language feature for iterating two lists, which is why the iteration is implemented differently in various locations throughout the class.
I created a patch that joins the two lists into one, which simplifies the iteration, unifies the implementation in all places, and prevents that the two lists get out of sync without becoming aware of the parallel iterations.
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