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https://issues.apache.org/jira/browse/LUCENE-2765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12932291#action_12932291
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Robert Muir commented on LUCENE-2765:
-------------------------------------
i ran a quick very rough check, with AND query (3149 results for this query)...
i didnt benchmark the omitTF case (but it should be better too)
all times in milliseconds
{code}
QueryParser qp = new QueryParser(Version.LUCENE_CURRENT, "body", new
MockAnalyzer());
Query query = qp.parse("+the +america");
System.out.println(searcher.search(query, 10).totalHits);
long ms = System.currentTimeMillis();
for (int i = 0; i < 1000; i++) {
searcher.search(query, 10);
}
long ms2 = System.currentTimeMillis();
System.out.println("time = " + (ms2 - ms));
{code}
||setup||run1||run2||run3||run4||run5||run6||
|trunk|1707|1706|1709|1704|1704|1703|
|LUCENE-2765|1628|1623|1641|1624|1627|1628|
seems worth it to me.
> Optimize scanning in DocsEnum
> -----------------------------
>
> Key: LUCENE-2765
> URL: https://issues.apache.org/jira/browse/LUCENE-2765
> Project: Lucene - Java
> Issue Type: Improvement
> Reporter: Robert Muir
> Fix For: 4.0
>
> Attachments: LUCENE-2765.patch, LUCENE-2765.patch
>
>
> Similar to LUCENE-2761:
> when we call advance(), after skipping it scans, but this can be optimized
> better than calling nextDoc() like today
> {noformat}
> // scan for the rest:
> do {
> nextDoc();
> } while (target > doc);
> {noformat}
> in particular, the freq can be "skipVinted" and the skipDocs (deletedDocs)
> don't need to be checked during this scanning.
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