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https://issues.apache.org/jira/browse/SOLR-2877?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13146516#comment-13146516
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Ryan McKinley commented on SOLR-2877:
-------------------------------------
rather then adding the hash functions to SolrInputDocument, what about just
adding a constructor where you can pass in the Map explicilty:
{code:java}
public SolrInputDocument(Map<String,SolrInputField> fields) {
_fields = fields;
}
{code}
This way you could also avoid using LinkedHashMap if that is not necessary
> SolrInputDocument performance improvements
> ------------------------------------------
>
> Key: SOLR-2877
> URL: https://issues.apache.org/jira/browse/SOLR-2877
> Project: Solr
> Issue Type: Improvement
> Components: SearchComponents - other
> Affects Versions: 3.4
> Reporter: Ivan Hrytsyuk
> Labels: SolrInputDocument, capacity, constructor, initial,
> loadfactor, performance
> Fix For: 3.5
>
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> org.apache.solr.common.SolrInputDocument has only single default constructor.
> Since it's a LinkedHashMap, it's initialised with default initialCapacity=16
> and loadFactor=0.75.
> That produces bad performance in situations when your document contains
> 10000+ different fields.
> org.apache.solr.common.SolrInputDocument class needs to have a constructor
> that allows to specify initialCapacity and loadFactor arguments.
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