{"id":17644440,"url":"https://github.com/vigna/sux4j","last_synced_at":"2026-03-12T08:42:17.693Z","repository":{"id":31868139,"uuid":"35436193","full_name":"vigna/Sux4J","owner":"vigna","description":"Sux4J is an effort to bring succinct data structures to Java.","archived":false,"fork":false,"pushed_at":"2025-06-22T08:47:18.000Z","size":23216,"stargazers_count":163,"open_issues_count":0,"forks_count":24,"subscribers_count":12,"default_branch":"master","last_synced_at":"2025-06-22T09:32:36.664Z","etag":null,"topics":["elias-fano","java","minimal-perfect-hash","ranking","selection","succinct-data-structure"],"latest_commit_sha":null,"homepage":"","language":"Java","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"lgpl-2.1","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/vigna.png","metadata":{"files":{"readme":"README.md","changelog":"CHANGES","contributing":null,"funding":null,"license":"COPYING.LESSER","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null}},"created_at":"2015-05-11T16:36:26.000Z","updated_at":"2025-06-22T08:47:22.000Z","dependencies_parsed_at":"2025-06-22T09:36:26.383Z","dependency_job_id":null,"html_url":"https://github.com/vigna/Sux4J","commit_stats":null,"previous_names":[],"tags_count":20,"template":false,"template_full_name":null,"purl":"pkg:github/vigna/Sux4J","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/vigna%2FSux4J","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/vigna%2FSux4J/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/vigna%2FSux4J/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/vigna%2FSux4J/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/vigna","download_url":"https://codeload.github.com/vigna/Sux4J/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/vigna%2FSux4J/sbom","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":261960502,"owners_count":23236572,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["elias-fano","java","minimal-perfect-hash","ranking","selection","succinct-data-structure"],"created_at":"2024-10-23T10:05:30.263Z","updated_at":"2026-03-12T08:42:12.654Z","avatar_url":"https://github.com/vigna.png","language":"Java","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Welcome to the Sux Project and Sux4J!\n\n## Introduction\n\nSux is an umbrella nickname for the results of my fiddling with the\nimplementation of basic succinct data structures in\n[C++](https://github.com/vigna/sux/),\n[Java](https://github.com/vigna/Sux4J/), and\n[Rust](https://github.com/vigna/sux-rs/).\n\nThis repository contains the Java code and references to some papers.\nPlease have a look at the other repositories for the main highlights in\neach language.\n\nThis is free software. The Rust and Java code is distributed under either\nthe [GNU Lesser General Public License\n2.1+](https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html) or the\n[Apache Software License\n2.0](https://www.apache.org/licenses/LICENSE-2.0). The C++ code is\ndistributed under the [GNU General Public License\n3.0+](https://www.gnu.org/licenses/gpl-3.0.html) with a [Runtime Library\nException](https://www.gnu.org/licenses/gcc-exception-3.1.html) (as the C\nstandard library).\n\n## Building\n\nYou need [Ant](https://ant.apache.org/) and [Ivy](https://ant.apache.org/ivy/).\nThen, run `ant ivy-setupjars jar`.\n\n## Papers\n\n* A [paper](http://vigna.di.unimi.it/papers.php#VigBIRSQ) on the broadword\n  techniques used in the rank/select code, and in particular about the\n  broadword implementation of select queries implemented in \u003cA\n  HREF=\"https://dsiutils.di.unimi.it/docs/it/unimi/dsi/bits/Fast.html#select(long,int)\"\u003e\u003ccode\u003eFast.select()\u003c/code\u003e\u003c/A\u003e.\n\n* A [paper](http://vigna.di.unimi.it/papers.php#BBPMMPH) on the theory of\n  monotone minimal perfect hashing.\n\n* An [experimental paper](http://vigna.di.unimi.it/papers.php#BBPTPMMPH2)\n  on monotone minimal perfect hashing.\n\n* A [paper](http://vigna.di.unimi.it/papers.php#GOVFSCF) on the current\n  implementation of static and minimal perfect hash functions.\n\n* A [paper](http://vigna.di.unimi.it/papers.php#GeVECSF) on the current\n  implementation of compressed static functions.\n\n* A [paper](http://vigna.di.unimi.it/papers.php#MaVCFTDRS) on the C++\n  implementation dynamic ranking and selection using compact Fenwick trees.\n\n* A [paper](http://vigna.di.unimi.it/papers.php#EGVRS) on the C++\n  implementation of RecSplit.\n\n* A [paper](http://vigna.di.unimi.it/papers.php#VigECS) on the Rust\n  implementation of functions and filters based on ε-cost sharding.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fvigna%2Fsux4j","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fvigna%2Fsux4j","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fvigna%2Fsux4j/lists"}