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https://issues.apache.org/jira/browse/SOLR-667?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12618826#action_12618826
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Yonik Seeley commented on SOLR-667:
-----------------------------------
If you don't need the synchronized block, then an atomic variable for "inserts"
(for example) would be a big win.
But if you have the synchronized block anyway, it's probably faster to just
expand it's scope if the operations to be done are simple.
> Alternate LRUCache implementation
> ---------------------------------
>
> Key: SOLR-667
> URL: https://issues.apache.org/jira/browse/SOLR-667
> Project: Solr
> Issue Type: New Feature
> Components: search
> Affects Versions: 1.3
> Reporter: Noble Paul
> Attachments: ConcurrentLRUCache.java
>
>
> The only available SolrCache i.e LRUCache is based on _LinkedHashMap_ which
> has _get()_ also synchronized. This can cause severe bottlenecks for faceted
> search. Any alternate implementation which can be faster/better must be
> considered.
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