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Apache Lucene open-source search software
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Adrien Grand 91019d685a
Compute better windows in MaxScoreBulkScorer. (#12593) 
MaxScoreBulkScorer computes windows based on the set of clauses that were
essential in the *previous* window. This usually works well as the set of
essential clauses tends to be stable over time, but there are cases when
clauses get swapped between essential and non-essential clauses, and computing
windows based on the previous window can lead to suboptimal choices.

This PR creates a first proposal for the next score window using essential
clauses from the previous window, and then creates a second proposal once
scorers have been partitioned and their max scores have been updated. If this
second proposal results in a smaller window, it gets used.

On one particular query (`the incredibles`) and a reordered index with BP
(which increases chances that scorers move from essential to non-essential or
vice-versa), this change yielded a 2.3x speedup.
 		2023-10-05 12:46:57 +02:00
.github Generate gradle.properties from gradlew (#12131) 2023-02-06 19:47:15 +01:00
buildSrc Upgrade forbiddenapis to 3.6 and ASM for APIJAR extraction to 9.6 (#12612) 2023-10-01 16:29:14 +02:00
dev-docs a bit of clarification about GitHub Milestone 2022-08-28 13:52:58 +09:00
dev-tools Add missing create github release step to release wizard (#12607) 2023-10-02 19:59:23 +02:00
gradle avoid-circular-jar-checks (#12618) 2023-10-03 16:44:55 -04:00
help Generate gradle.properties from gradlew (#12131) 2023-02-06 19:47:15 +01:00
lucene Compute better windows in MaxScoreBulkScorer. (#12593) 2023-10-05 12:46:57 +02:00
.asf.yaml .asf.yaml 2022-08-16 20:02:47 +09:00
.dir-locals.el LUCENE-9322: Add Lucene90 codec, including VectorFormat 2020-10-18 07:49:36 -04:00
.git-blame-ignore-revs LUCENE-9570: code reformatting [record rev]. 2021-01-05 13:44:42 +01:00
.gitattributes LUCENE-10305: Ensure line endings of versions.props is LF 2021-12-11 10:10:44 +09:00
.gitignore LUCENE-9920: Remove binary gradle-wrapper.jar from the repository 2021-04-10 16:08:39 +02:00
.hgignore LUCENE-2792: add FST impl 2010-12-12 15:36:08 +00:00
.lift.toml Disable liftbot, we have our own tools 2022-05-05 22:27:57 +02:00
CONTRIBUTING.md Fix type in CONTRIBUTING.md (#11879) 2022-11-01 20:10:05 +00:00
LICENSE.txt LUCENE-10163 Move LICENSE and NOTICE file to top level (#388) 2021-10-18 01:24:11 +02:00
NOTICE.txt Cleanup NOTICE.txt (#12227) 2023-04-18 15:58:09 -04:00
README.md Allow building with java 18 now that gradle supports it (#11889) 2022-10-28 23:41:09 -04:00
build.gradle Upgrade forbiddenapis to 3.6 and ASM for APIJAR extraction to 9.6 (#12612) 2023-10-01 16:29:14 +02:00
gradlew Generate gradle.properties from gradlew (#12131) 2023-02-06 19:47:15 +01:00
gradlew.bat Generate gradle.properties from gradlew (#12131) 2023-02-06 19:47:15 +01:00
settings.gradle GH-11172: remove WindowsDirectory and native subproject. (#11774) 2022-09-15 16:22:46 +02:00
versions.lock remove non-NRT replication support (#12038) 2023-01-14 11:14:46 -05:00
versions.props Upgrade to errorprone 2.18 (#12086) 2023-01-14 14:39:23 -05:00

README.md

Apache Lucene

Lucene Logo

Apache Lucene is a high-performance, full-featured text search engine library written in Java.

Build Status

Online Documentation

This README file only contains basic setup instructions. For more comprehensive documentation, visit:

Building

Basic steps:

  1. Install OpenJDK 17 or 18.
  2. Clone Lucene's git repository (or download the source distribution).
  3. Run gradle launcher script (gradlew).

We'll assume that you know how to get and set up the JDK - if you don't, then we suggest starting at https://jdk.java.net/ and learning more about Java, before returning to this README.

See Contributing Guide for details.

Contributing

Bug fixes, improvements and new features are always welcome! Please review the Contributing to Lucene Guide for information on contributing.

Discussion and Support