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https://issues.apache.org/jira/browse/SOLR-9506?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15556132#comment-15556132
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Pushkar Raste commented on SOLR-9506:
-------------------------------------

I also found some weird behavior. If I use {{parallelStream}} to compute 
segment fingerprints in parallel. When I reduce it to the index fingerprint on 
the index searcher, test fails. Why should order of computation and reduction 
matter in this case?

> cache IndexFingerprint for each segment
> ---------------------------------------
>
>                 Key: SOLR-9506
>                 URL: https://issues.apache.org/jira/browse/SOLR-9506
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Noble Paul
>         Attachments: SOLR-9506.patch, SOLR-9506.patch, SOLR-9506_POC.patch
>
>
> The IndexFingerprint is cached per index searcher. it is quite useless during 
> high throughput indexing. If the fingerprint is cached per segment it will 
> make it vastly more efficient to compute the fingerprint



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