[jira] Updated: (LUCENE-2765) Optimize scanning in DocsEnum

["Robert Muir (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-2765?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Muir updated LUCENE-2765:
--------------------------------

    Attachment: LUCENE-2765.patch

here's a patch, maybe can be beautified/optimized further.

needs benchmarking.

> 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
>
>
> 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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