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https://issues.apache.org/jira/browse/LUCENE-4951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13638975#comment-13638975
]
Michael McCandless commented on LUCENE-4951:
--------------------------------------------
{noformat}
Task QPS base StdDev QPS comp StdDev
Pct diff
HighTermHardOrDD1 2.54 (2.6%) 1.25 (2.4%)
-50.9% ( -54% - -47%)
HighTermEasyOrDD2 18.02 (1.0%) 9.76 (0.8%)
-45.9% ( -47% - -44%)
HighTermHardOrDD2 2.42 (2.6%) 1.32 (1.6%)
-45.4% ( -48% - -42%)
HighTermHardDD1 3.13 (2.4%) 1.85 (1.7%)
-40.8% ( -43% - -37%)
MedTermEasyOrDD2 37.69 (1.6%) 22.31 (1.4%)
-40.8% ( -43% - -38%)
MedTermEasyOrDD1 29.78 (1.9%) 18.27 (1.4%)
-38.7% ( -41% - -36%)
HighTermEasyDD1 5.86 (2.5%) 3.73 (3.0%)
-36.3% ( -40% - -31%)
HighTermEasyOrDD1 6.37 (2.5%) 4.06 (1.5%)
-36.2% ( -39% - -33%)
MedTermEasyDD1 32.05 (1.9%) 21.38 (2.7%)
-33.3% ( -37% - -29%)
MedTermHardOrDD1 11.73 (2.9%) 7.84 (2.7%)
-33.2% ( -37% - -28%)
HighTermMixedDD2 4.50 (2.4%) 3.02 (1.3%)
-32.9% ( -35% - -30%)
HighTermHardDD2 1.98 (2.6%) 1.34 (1.5%)
-32.5% ( -35% - -29%)
LowTermEasyOrDD1 90.29 (0.9%) 60.98 (1.6%)
-32.5% ( -34% - -30%)
MedTermHardOrDD2 7.19 (2.9%) 5.05 (1.7%)
-29.8% ( -33% - -25%)
HighTermEasyDD2 27.17 (0.9%) 19.70 (0.9%)
-27.5% ( -29% - -25%)
LowTermEasyDD1 101.22 (0.8%) 80.80 (1.6%)
-20.2% ( -22% - -17%)
MedTermHardDD1 12.26 (2.8%) 9.82 (2.0%)
-19.9% ( -24% - -15%)
MedTermEasyDD2 55.60 (1.4%) 45.55 (1.2%)
-18.1% ( -20% - -15%)
LowTermHardDD2 29.13 (0.7%) 25.56 (1.2%)
-12.3% ( -14% - -10%)
MedTermHardDD2 7.21 (3.0%) 6.47 (1.7%)
-10.2% ( -14% - -5%)
MedTermMixedDD2 14.49 (4.4%) 13.52 (1.5%)
-6.7% ( -12% - 0%)
LowTermEasyDD2 145.99 (3.3%) 148.04 (1.8%)
1.4% ( -3% - 6%)
LowTermEasyOrDD2 65.37 (2.9%) 69.22 (2.1%)
5.9% ( 0% - 11%)
LowTermHardOrDD1 20.85 (4.8%) 27.88 (2.9%)
33.7% ( 24% - 43%)
LowTermHardDD1 22.05 (4.8%) 33.55 (2.0%)
52.2% ( 43% - 61%)
LowTermHardOrDD2 12.70 (5.3%) 19.86 (2.2%)
56.3% ( 46% - 67%)
LowTermMixedDD2 23.87 (6.5%) 47.12 (3.0%)
97.4% ( 82% - 114%)
{noformat}
After the patch:
{noformat}
Task QPS base StdDev QPS comp StdDev
Pct diff
HighTermHardOrDD1 2.56 (3.1%) 1.25 (1.9%)
-51.1% ( -54% - -47%)
MedTermEasyOrDD2 45.66 (3.4%) 22.35 (0.9%)
-51.0% ( -53% - -48%)
HighTermHardOrDD2 2.43 (3.1%) 1.31 (1.8%)
-46.0% ( -49% - -42%)
MedTermHardOrDD1 14.41 (2.2%) 7.86 (1.7%)
-45.4% ( -48% - -42%)
MedTermHardOrDD2 8.63 (1.8%) 5.04 (1.5%)
-41.6% ( -44% - -39%)
HighTermHardDD1 3.15 (3.0%) 1.86 (1.2%)
-40.8% ( -43% - -37%)
MedTermEasyOrDD1 30.07 (2.7%) 18.28 (1.2%)
-39.2% ( -41% - -36%)
HighTermEasyOrDD1 6.46 (3.3%) 4.07 (1.4%)
-37.1% ( -40% - -33%)
HighTermEasyDD1 5.95 (3.5%) 3.76 (1.3%)
-36.9% ( -40% - -33%)
MedTermHardDD1 15.24 (2.1%) 9.89 (1.2%)
-35.1% ( -37% - -32%)
HighTermMixedDD2 4.57 (3.1%) 3.02 (1.0%)
-34.0% ( -36% - -30%)
MedTermEasyDD1 32.38 (2.8%) 21.51 (1.2%)
-33.6% ( -36% - -30%)
HighTermHardDD2 1.99 (3.0%) 1.34 (1.3%)
-32.8% ( -36% - -29%)
LowTermEasyOrDD1 90.54 (1.1%) 61.22 (1.1%)
-32.4% ( -34% - -30%)
LowTermEasyOrDD2 101.27 (4.1%) 69.42 (1.1%)
-31.5% ( -35% - -27%)
HighTermEasyOrDD2 14.14 (4.5%) 9.70 (1.4%)
-31.4% ( -35% - -26%)
LowTermHardOrDD1 38.76 (1.2%) 27.93 (1.2%)
-28.0% ( -29% - -25%)
MedTermMixedDD2 18.71 (1.3%) 13.52 (1.0%)
-27.7% ( -29% - -25%)
MedTermHardDD2 8.84 (1.9%) 6.48 (1.2%)
-26.6% ( -29% - -23%)
MedTermEasyDD2 61.20 (4.3%) 45.55 (1.2%)
-25.6% ( -29% - -21%)
LowTermHardOrDD2 26.55 (0.9%) 19.86 (1.3%)
-25.2% ( -27% - -23%)
LowTermEasyDD2 187.68 (1.2%) 148.29 (1.3%)
-21.0% ( -23% - -18%)
LowTermEasyDD1 101.97 (1.5%) 80.92 (0.7%)
-20.6% ( -22% - -18%)
LowTermHardDD1 41.60 (0.8%) 33.70 (1.1%)
-19.0% ( -20% - -17%)
LowTermHardDD2 29.39 (1.0%) 25.58 (1.2%)
-13.0% ( -15% - -10%)
LowTermMixedDD2 53.89 (0.9%) 47.31 (1.2%)
-12.2% ( -14% - -10%)
HighTermEasyDD2 18.77 (5.3%) 19.72 (1.3%)
5.0% ( -1% - 12%)
{noformat}
Ie, using cost API lets DrillSidewaysScorer do a better job picking
which scorer impl to use ...
> DrillSidewaysScorer should use Scorer.cost instead of its own heuristic
> -----------------------------------------------------------------------
>
> Key: LUCENE-4951
> URL: https://issues.apache.org/jira/browse/LUCENE-4951
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 5.0, 4.4
>
> Attachments: LUCENE-4951.patch
>
>
> Today it does the "first docID" trick to guess the cost of the
> baseQuery, which is silly now that we have cost API.
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