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Apache Lucene open-source search software
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Adrien Grand 5b87a31556
Speed up sorting on unique string fields. (#11903) 
Since increasing the number of hits retrieved in nightly benchmarks from 10 to
100, the performance of sorting documents by title dropped back to the level it
had before introducing dynamic pruning. This is not too surprising given that
the `title` field is a unique field, so the optimization would only kick in
when the current 100th hit would have an ordinal that is less than 128 -
something that would only happen after collecting most hits.

This change increases the threshold to 1024, so that the optimization would
kick in when the current 100th hit has an ordinal that is less than 1024,
something that happens a bit sooner.
 		2023-11-02 14:16:11 +01:00
.github Build: build scans on ge.apache.org to benefit from deep build insights (#12293) 2023-10-24 12:32:18 -04:00
buildSrc LUCENE-10144:fix resource leak due to Files.list (#354) 2023-11-02 06:53:48 -04:00
dev-docs a bit of clarification about GitHub Milestone 2022-08-28 13:52:58 +09:00
dev-tools ReleaseWizard - Upgrade 'consolemenu' dependency to v0.7.1 (#11855) 2023-11-02 07:42:45 -04:00
gradle Fix javac task inputs so that they include modular dependencies #12742 (#12745) 2023-11-02 08:49:41 +01:00
help slight correction 2023-10-21 02:05:34 -04:00
lucene Speed up sorting on unique string fields. (#11903) 2023-11-02 14:16:11 +01:00
.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 GITHUB#12655: Add google java format upgrade tidy / regen to blame ignore 2023-10-11 16:15:42 -04:00
.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 GITHUB#12655: upgrade jacoco aggregation plugin (failed with gradle 8.x), change html output property. 2023-10-12 20:42:17 +02:00
gradlew GITHUB#12655: Upgrade to Gradle 8.4 2023-10-11 16:11:53 -04:00
gradlew.bat GITHUB#12655: Upgrade to Gradle 8.4 2023-10-11 16:11:53 -04:00
settings.gradle Build: build scans on ge.apache.org to benefit from deep build insights (#12293) 2023-10-24 12:32:18 -04:00
versions.lock Added JMH micro-benchmarks submodule (#12663) 2023-10-12 20:25:34 +02:00
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