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https://issues.apache.org/jira/browse/LUCENE-1483?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12654805#action_12654805
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Marvin Humphrey commented on LUCENE-1483:
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> Quick micro bench - did it twice and both times came out 17% slower.
I'd guess that all the OO construction/destruction costs in this part of your
patch are slowing things down.
{code}
+ Searchable[] searchers = new Searchable[readers.length];
+ for(int i = 0; i < readers.length; i++) {
+ searchers[i] = new IndexSearcher(readers[i]);
+ }
+
+ MultiSearcher multiSearcher = new MultiSearcher(searchers);
+ return multiSearcher.search(weight, filter, nDocs, sort);
{code}
> Change IndexSearcher to use MultiSearcher semantics for sorted searches
> -----------------------------------------------------------------------
>
> Key: LUCENE-1483
> URL: https://issues.apache.org/jira/browse/LUCENE-1483
> Project: Lucene - Java
> Issue Type: Improvement
> Affects Versions: 2.9
> Reporter: Mark Miller
> Priority: Minor
> Attachments: LUCENE-1483.patch
>
>
> Here is a quick test patch. FieldCache for sorting is done at the individual
> IndexReader level and reloading the fieldcache on reopen can be much faster
> as only changed segments need to be reloaded.
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