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https://issues.apache.org/jira/browse/SOLR-15315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17337547#comment-17337547
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Christine Poerschke commented on SOLR-15315:
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Thanks [~pd.skant] for opening this ticket and linked pull request! I'll aim to
take a look next week.
> MultipleAdditiveTreesModel Latency optimisation for LTR tree traversal
> ----------------------------------------------------------------------
>
> Key: SOLR-15315
> URL: https://issues.apache.org/jira/browse/SOLR-15315
> Project: Solr
> Issue Type: Task
> Components: contrib - LTR
> Reporter: Suryakant Pandey
> Priority: Major
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> LTR tree traversal currently happens in a recursive way.
> *Background* :When we tried to increase the number of trees in our production
> solr, we were facing latency issue. From solr profiling it came out that most
> time is spent in recursive call for tree traversal.
>
> Recursion is slower due to overhead of function call stack, so we optimised
> this and translated it to loop based approach. This improved solr latency
> significantly and we were able to scale much better.
>
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