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Apache Lucene open-source search software
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Adrien Grand 17c13a76c8
Add BS1 optimization to MaxScoreBulkScorer. (#12444) 
Lucene's scorers that can dynamically prune on score provide great speedups
when they manage to skip many hits. Unfortunately, there are also cases when
they cannot skip hits efficiently, one example case being when there are many
clauses in the query. In this case, exhaustively evaluating the set of matches
with `BooleanScorer` (BS1) may perform several times faster.

This commit adds to `MaxScoreBulkScorer` the BS1 optimization that consists of
collecting hits into a bitset to save the overhead of reordering priority
queues. This helps make performance degrade much more gracefully when dynamic
pruning cannot help much.

Closes #12439
 		2023-07-19 13:51:22 +02:00
.github Generate gradle.properties from gradlew (#12131) 2023-02-06 19:47:15 +01:00
buildSrc Implement MMapDirectory with Java 21 Project Panama Preview API (#12294) 2023-06-12 21:07:04 +02:00
dev-docs a bit of clarification about GitHub Milestone 2022-08-28 13:52:58 +09:00
dev-tools DOAP changes for release 9.7.0 2023-06-26 11:05:46 +02:00
gradle Fix forUtil.gradle to actually execute python script and also fix type error in script (#12411) 2023-07-03 16:22:03 +02:00
help Generate gradle.properties from gradlew (#12131) 2023-02-06 19:47:15 +01:00
lucene Add BS1 optimization to MaxScoreBulkScorer. (#12444) 2023-07-19 13:51:22 +02:00
.asf.yaml .asf.yaml 2022-08-16 20:02:47 +09:00
.dir-locals.el
…
.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
…
.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 Integrate the Incubating Panama Vector API (#12311) 2023-05-25 07:59:50 +01:00
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