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https://issues.apache.org/jira/browse/LUCENE-4577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13505938#comment-13505938
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Michael McCandless commented on LUCENE-4577:
--------------------------------------------
+1
I tested patch on 10M Wikipedia index:
{noformat}
Task QPS base StdDev QPS comp StdDev
Pct diff
HighTerm 27.63 (18.2%) 25.45 (7.9%)
-7.9% ( -28% - 22%)
MedTerm 226.33 (16.0%) 211.09 (7.8%)
-6.7% ( -26% - 20%)
MedPhrase 7.14 (5.4%) 6.94 (4.4%)
-2.8% ( -11% - 7%)
HighPhrase 4.79 (5.0%) 4.66 (5.5%)
-2.7% ( -12% - 8%)
LowTerm 505.56 (7.8%) 492.74 (5.7%)
-2.5% ( -14% - 11%)
LowPhrase 9.60 (3.6%) 9.39 (3.4%)
-2.2% ( -8% - 4%)
MedSloppyPhrase 29.15 (3.3%) 28.72 (2.3%)
-1.5% ( -6% - 4%)
HighSloppyPhrase 4.05 (5.0%) 4.00 (3.4%)
-1.3% ( -9% - 7%)
LowSloppyPhrase 9.15 (4.1%) 9.07 (2.9%)
-0.9% ( -7% - 6%)
AndHighMed 86.43 (1.2%) 85.99 (1.6%)
-0.5% ( -3% - 2%)
PKLookup 197.83 (1.3%) 197.12 (1.1%)
-0.4% ( -2% - 2%)
AndHighHigh 25.58 (1.5%) 25.53 (2.2%)
-0.2% ( -3% - 3%)
AndHighLow 657.57 (1.0%) 658.40 (1.5%)
0.1% ( -2% - 2%)
LowSpanNear 11.99 (2.1%) 12.02 (2.2%)
0.2% ( -3% - 4%)
Prefix3 17.52 (5.7%) 17.60 (5.3%)
0.4% ( -10% - 12%)
HighSpanNear 5.64 (2.4%) 5.66 (3.5%)
0.5% ( -5% - 6%)
MedSpanNear 12.44 (2.9%) 12.52 (2.7%)
0.6% ( -4% - 6%)
Wildcard 91.63 (3.8%) 92.33 (3.3%)
0.8% ( -6% - 8%)
Respell 82.47 (2.9%) 83.58 (2.2%)
1.3% ( -3% - 6%)
IntNRQ 10.65 (10.7%) 10.79 (10.8%)
1.3% ( -18% - 25%)
Fuzzy2 67.84 (3.0%) 69.46 (2.7%)
2.4% ( -3% - 8%)
Fuzzy1 76.30 (2.4%) 78.46 (2.2%)
2.8% ( -1% - 7%)
OrHighHigh 9.30 (6.7%) 9.96 (8.6%)
7.2% ( -7% - 24%)
OrHighMed 41.01 (7.3%) 44.63 (9.3%)
8.8% ( -7% - 27%)
OrHighLow 25.19 (7.8%) 27.45 (9.9%)
9.0% ( -8% - 28%)
{noformat}
> Nuke TFIDFSim's cache
> ---------------------
>
> Key: LUCENE-4577
> URL: https://issues.apache.org/jira/browse/LUCENE-4577
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Robert Muir
> Attachments: LUCENE-4577.patch
>
>
> This is the old termscorer cache.
> This helps nothing, and maybe hurts: I removed it and here are the results:
> {noformat}
> Chart saved to out.png... (wd:
> /home/rmuir/workspace/lucene-trunk/lucene/benchmark)
> Task QPS base StdDev QPS patch StdDev
> Pct diff
> TermGroup1M 52.87 (2.2%) 52.62 (2.4%)
> -0.5% ( -4% - 4%)
> AndHighMed 34.82 (2.8%) 34.70 (3.6%)
> -0.3% ( -6% - 6%)
> SpanNear 6.28 (5.3%) 6.26 (3.9%)
> -0.2% ( -8% - 9%)
> IntNRQ 13.24 (11.0%) 13.24 (9.9%)
> 0.0% ( -18% - 23%)
> Prefix3 42.19 (7.6%) 42.21 (7.0%)
> 0.1% ( -13% - 15%)
> Wildcard 36.90 (6.8%) 37.02 (5.9%)
> 0.3% ( -11% - 13%)
> AndHighHigh 25.68 (4.5%) 25.79 (3.2%)
> 0.5% ( -6% - 8%)
> Phrase 9.28 (4.7%) 9.35 (4.4%)
> 0.7% ( -8% - 10%)
> TermBGroup1M 45.76 (6.3%) 46.10 (3.2%)
> 0.7% ( -8% - 10%)
> SloppyPhrase 10.25 (3.9%) 10.33 (4.4%)
> 0.8% ( -7% - 9%)
> OrHighHigh 8.87 (6.4%) 8.97 (6.7%)
> 1.1% ( -11% - 15%)
> Fuzzy1 70.28 (4.3%) 71.24 (7.1%)
> 1.4% ( -9% - 13%)
> OrHighMed 10.70 (7.0%) 10.86 (6.4%)
> 1.5% ( -11% - 15%)
> Fuzzy2 27.79 (6.1%) 28.31 (5.1%)
> 1.9% ( -8% - 13%)
> Respell 71.72 (6.8%) 73.39 (3.7%)
> 2.3% ( -7% - 13%)
> Term 209.49 (4.4%) 214.58 (3.7%)
> 2.4% ( -5% - 11%)
> TermBGroup1M1P 7.10 (5.1%) 7.48 (7.8%)
> 5.3% ( -7% - 19%)
> {noformat}
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