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Apache Lucene open-source search software
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Robert Muir 10d9c7440b
Speed up docvalues set query by making use of sortedness (#12128) 
LongHashSet is used for the set of numbers, but it has some issues:
* tries to hard to extend AbstractSet, mostly for testing
* causes traps with boxing if you aren't careful
* complex hashcode/equals

Practically we should take advantage of the fact numbers come in sorted
order for multivalued fields: just like range queries do. So we use
min/max to our advantage, including termination of docvalues iteration

Actually it is generally a win to just check min/max even in the single-valued
case: these constant time comparisons are cheap and can avoid hashing,
etc.

In the worst-case, if all of your query Sets contain both the minimum and maximum
possible values, then it won't help, but it doesn't hurt either.
 		2023-02-06 12:14:02 -05:00
.github Update github actions to v3. (#11931) 2022-11-14 19:50:52 +01:00
buildSrc Upgrade gradle to 7.6. (#11993) 2022-12-02 09:18:38 +01:00
dev-docs a bit of clarification about GitHub Milestone 2022-08-28 13:52:58 +09:00
dev-tools Release wizard: update folder name in stage artifacts command (#12117) 2023-02-01 10:47:32 +01:00
gradle remove username from MANIFEST.MF in build artifacts (#12096) 2023-01-23 16:45:38 -05:00
help Add a note about gradle checks being possibly a subset of all validation checks. (#11966) 2022-11-23 12:19:28 +01:00
lucene Speed up docvalues set query by making use of sortedness (#12128) 2023-02-06 12:14:02 -05:00
.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 remove non-NRT replication support (#12038) 2023-01-14 11:14:46 -05:00
README.md Allow building with java 18 now that gradle supports it (#11889) 2022-10-28 23:41:09 -04:00
build.gradle Patch class files for Java 19 code to no longer have the "preview" flag (this enables Java 19 memory segments by default) (#12033) 2022-12-26 10:07:44 +01:00
gradlew Upgrade gradle to 7.6. (#11993) 2022-12-02 09:18:38 +01:00
gradlew.bat Upgrade gradle to 7.6. (#11993) 2022-12-02 09:18:38 +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