Keith Laban commented on SOLR-9506:

Are you implying that if you add a document. commit it, compute the index 
fingerprint and cache the segments. Then delete that document and commit that 
change, and compute the fingerprint again with the cached segment fingerprint, 
you will end up with the same index fingerprint?

> 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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