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https://issues.apache.org/jira/browse/LUCENE-5808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14056846#comment-14056846
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Michael McCandless commented on LUCENE-5808:
--------------------------------------------
I really like these simplifications.
I ran perf test vs trunk:
{noformat}
Report after iter 19:
Task QPS base StdDev QPS comp StdDev
Pct diff
OrHighHigh 9.74 (13.5%) 8.28 (18.8%)
-15.0% ( -41% - 20%)
OrNotHighLow 23.71 (13.3%) 21.22 (16.1%)
-10.5% ( -35% - 21%)
OrHighMed 31.79 (7.6%) 28.73 (14.9%)
-9.6% ( -29% - 13%)
OrHighNotHigh 13.18 (12.8%) 12.16 (14.1%)
-7.7% ( -30% - 21%)
HighTerm 67.90 (14.5%) 62.68 (19.0%)
-7.7% ( -35% - 30%)
OrHighNotLow 29.26 (14.3%) 27.10 (14.2%)
-7.4% ( -31% - 24%)
OrNotHighMed 22.57 (15.0%) 20.93 (15.5%)
-7.3% ( -32% - 27%)
Prefix3 86.86 (10.2%) 81.99 (14.8%)
-5.6% ( -27% - 21%)
OrNotHighHigh 10.41 (13.2%) 9.87 (14.7%)
-5.2% ( -29% - 26%)
Fuzzy1 55.92 (10.0%) 53.24 (13.4%)
-4.8% ( -25% - 20%)
HighSloppyPhrase 3.42 (14.6%) 3.26 (17.5%)
-4.6% ( -31% - 32%)
HighSpanNear 9.37 (15.8%) 9.09 (19.9%)
-3.0% ( -33% - 38%)
HighPhrase 4.33 (10.8%) 4.20 (16.8%)
-2.9% ( -27% - 27%)
OrHighLow 21.82 (15.5%) 21.38 (13.9%)
-2.1% ( -27% - 32%)
AndHighMed 34.04 (4.8%) 33.56 (11.8%)
-1.4% ( -17% - 15%)
OrHighNotMed 33.92 (19.4%) 33.57 (13.1%)
-1.0% ( -28% - 38%)
LowTerm 318.33 (15.4%) 318.45 (12.9%)
0.0% ( -24% - 33%)
Respell 45.80 (11.8%) 45.85 (14.5%)
0.1% ( -23% - 29%)
AndHighHigh 28.10 (6.3%) 28.19 (11.3%)
0.3% ( -16% - 19%)
Fuzzy2 41.95 (10.1%) 42.40 (16.0%)
1.1% ( -22% - 30%)
Wildcard 18.84 (11.5%) 19.13 (12.2%)
1.5% ( -19% - 28%)
IntNRQ 3.17 (14.0%) 3.22 (17.2%)
1.5% ( -26% - 38%)
LowPhrase 12.83 (10.3%) 13.08 (16.3%)
2.0% ( -22% - 31%)
MedTerm 98.48 (18.2%) 100.63 (16.9%)
2.2% ( -27% - 45%)
MedPhrase 197.18 (13.3%) 201.95 (12.6%)
2.4% ( -20% - 32%)
MedSloppyPhrase 3.32 (16.1%) 3.50 (14.2%)
5.4% ( -21% - 42%)
AndHighLow 352.18 (12.9%) 375.73 (14.4%)
6.7% ( -18% - 39%)
LowSloppyPhrase 42.72 (12.0%) 46.52 (21.5%)
8.9% ( -22% - 48%)
LowSpanNear 10.23 (15.7%) 11.24 (18.9%)
9.9% ( -21% - 52%)
MedSpanNear 31.53 (14.1%) 35.40 (20.7%)
12.3% ( -19% - 54%)
{noformat}
Seems like OR queries lost a bit ...
> clean up postingsreader
> -----------------------
>
> Key: LUCENE-5808
> URL: https://issues.apache.org/jira/browse/LUCENE-5808
> Project: Lucene - Core
> Issue Type: Task
> Reporter: Robert Muir
> Attachments: LUCENE-5808.patch
>
>
> The current postingsreader is ~ 1500 lines of code (mostly duplicated)
> calling something like 4,000 lines of generated decompression code.
> This is really heavyweight and complicated, and bloats the lucene jar. It
> would be nice to simplify it so we can eventually remove the baggage.
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