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From "Simon Willnauer (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2694) MTQ rewrite + weight/scorer init should be single pass
Date Sun, 19 Dec 2010 18:40:01 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12973031#action_12973031
] 

Simon Willnauer commented on LUCENE-2694:
-----------------------------------------

Here are some numbers for the latest patch with 10M wiki index (commitpoint: delmulti) and
all MTQ rewriting to ScoreBoolean:

{code}
               Query    QPS base    QPS spec  Pct diff
    +nebraska +state       42.96       42.17     -1.8%
          unit state        3.63        3.61     -0.4%
        "unit state"        1.72        1.71     -0.3%
               state       10.55       10.54     -0.1%
spanNear([unit, state], 10, true)        0.96        0.96      0.1%
        +unit +state        4.03        4.04      0.2%
  spanFirst(unit, 5)        4.83        4.86      0.7%
          united~1.0        4.76        4.86      2.1%
            unit~1.0        2.62        2.69      2.7%
          united~2.0        0.82        0.84      2.8%
            unit~2.0        0.34        0.37      8.2%
                un*d        3.55        4.14     16.6%
                uni*        0.52        0.61     18.1%
                 u*d        0.47        0.57     19.9%
               unit*        2.04        2.52     23.8%
{code}

> MTQ rewrite + weight/scorer init should be single pass
> ------------------------------------------------------
>
>                 Key: LUCENE-2694
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2694
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Search
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>             Fix For: 4.0
>
>         Attachments: LUCENE-2694-FTE.patch, LUCENE-2694.patch, LUCENE-2694.patch, LUCENE-2694.patch,
LUCENE-2694.patch
>
>
> Spinoff of LUCENE-2690 (see the hacked patch on that issue)...
> Once we fix MTQ rewrite to be per-segment, we should take it further and make weight/scorer
init also run in the same single pass as rewrite.

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