Chips-n-Salsa: A Java Library of Customizable, Hybridizable, Iterative, Parallel, Stochastic, and Self-Adaptive Local Search Algorithms

Chips-n-Salsa: A Java Library of Customizable, Hybridizable, Iterative, Parallel, Stochastic, and Self-Adaptive Local Search Algorithms - Published in JOSS (2020)
https://github.com/cicirello/chips-n-salsa

Keywords

adaptive discrete-optimization evolutionary-computation genetic-algorithm hbss hill-climbing java local-search metaheuristics multithreading mutation optimization parallel-computing permutations randomized-heuristics scheduling search-algorithm simulated-annealing stochastic-sampling vbss

Keywords from Contributors

transforms measur archiving social-network observation conversion generic animals projection robot

Last synced: 2 months ago
JSON representation

Acceptance Criteria

Repository metadata

A Java library of Customizable, Hybridizable, Iterative, Parallel, Stochastic, and Self-Adaptive Local Search Algorithms


Owner metadata


GitHub Events

Total
Last Year

Committers metadata

Last synced: 2 months ago

Total Commits: 2,002
Total Committers: 4
Avg Commits per committer: 500.5
Development Distribution Score (DDS): 0.129

Commits in past year: 64
Committers in past year: 2
Avg Commits per committer in past year: 32.0
Development Distribution Score (DDS) in past year: 0.219

Name Email Commits
Vincent A. Cicirello c****o 1743
dependabot[bot] 4****] 257
Nicholas Nadeau, Ph.D., P.Eng n****u 1
Nicholas Nadeau n****u@g****m 1

Issue and Pull Request metadata

Last synced: 2 months ago

Total issues: 54
Total pull requests: 315
Average time to close issues: 19 days
Average time to close pull requests: about 22 hours
Total issue authors: 4
Total pull request authors: 3
Average comments per issue: 0.07
Average comments per pull request: 0.48
Merged pull request: 292
Bot issues: 1
Bot pull requests: 235

Past year issues: 4
Past year pull requests: 87
Past year average time to close issues: 5 days
Past year average time to close pull requests: about 10 hours
Past year issue authors: 2
Past year pull request authors: 2
Past year average comments per issue: 0.0
Past year average comments per pull request: 0.16
Past year merged pull request: 75
Past year bot issues: 1
Past year bot pull requests: 74

More stats: https://issues.ecosyste.ms/repositories/lookup?url=https://github.com/cicirello/chips-n-salsa

Top Issue Authors

  • cicirello (51)
  • DarioK98 (1)
  • dependabot[bot] (1)
  • N-Wouda (1)

Top Pull Request Authors

  • dependabot[bot] (235)
  • cicirello (79)
  • DarioK98 (1)

Top Issue Labels

  • refactor (24)
  • testing (20)
  • bug (17)
  • enhancement (3)
  • cicd (3)
  • dependencies (3)
  • java (2)
  • invalid (1)
  • github_actions (1)
  • documentation (1)

Top Pull Request Labels

  • dependencies (238)
  • java (232)
  • refactor (30)
  • testing (17)
  • documentation (15)
  • bug (13)
  • cicd (10)
  • github_actions (8)
  • enhancement (6)
  • invalid (1)
  • hacktoberfest-accepted (1)

Package metadata

proxy.golang.org: github.com/cicirello/chips-n-salsa

proxy.golang.org: github.com/cicirello/Chips-n-Salsa

repo1.maven.org: org.cicirello:chips-n-salsa

Chips-n-Salsa is a Java library of customizable, hybridizable, iterative, parallel, stochastic, and self-adaptive local search algorithms. The library includes implementations of several stochastic local search algorithms, including simulated annealing, hill climbers, as well as constructive search algorithms such as stochastic sampling. Chips-n-Salsa now also includes genetic algorithms as well as evolutionary algorithms more generally. The library very extensively supports simulated annealing. It includes several classes for representing solutions to a variety of optimization problems. For example, the library includes a BitVector class that implements vectors of bits, as well as classes for representing solutions to problems where we are searching for an optimal vector of integers or reals. For each of the built-in representations, the library provides the most common mutation operators for generating random neighbors of candidate solutions, as well as common crossover operators for use with evolutionary algorithms. Additionally, the library provides extensive support for permutation optimization problems, including implementations of many different mutation operators for permutations, and utilizing the efficiently implemented Permutation class of the JavaPermutationTools (JPT) library. Chips-n-Salsa is customizable, making extensive use of Java's generic types, enabling using the library to optimize other types of representations beyond what is provided in the library. It is hybridizable, providing support for integrating multiple forms of local search (e.g., using a hill climber on a solution generated by simulated annealing), creating hybrid mutation operators (e.g., local search using multiple mutation operators), as well as support for running more than one type of search for the same problem concurrently using multiple threads as a form of algorithm portfolio. Chips-n-Salsa is iterative, with support for multistart metaheuristics, including implementations of several restart schedules for varying the run lengths across the restarts. It also supports parallel execution of multiple instances of the same, or different, stochastic local search algorithms for an instance of a problem to accelerate the search process. The library supports self-adaptive search in a variety of ways, such as including implementations of adaptive annealing schedules for simulated annealing, such as the Modified Lam schedule, implementations of the simpler annealing schedules but which self-tune the initial temperature and other parameters, and restart schedules that adapt to run length.

  • Homepage: https://chips-n-salsa.cicirello.org/
  • Documentation: https://appdoc.app/artifact/org.cicirello/chips-n-salsa/
  • Licenses: GPL-3.0-or-later
  • Latest release: 7.0.2 (published 8 months ago)
  • Last Synced: 2025-10-26T01:22:46.563Z (2 months ago)
  • Versions: 44
  • Dependent Packages: 3
  • Dependent Repositories: 5
  • Rankings:
    • Dependent repos count: 10.836%
    • Dependent packages count: 17.328%
    • Average: 21.816%
    • Forks count: 26.885%
    • Stargazers count: 32.215%

Dependencies

pom.xml maven
  • org.cicirello:core 2.2.2
  • org.cicirello:jpt 4.0.0
  • org.cicirello:rho-mu 2.3.2
  • org.junit.jupiter:junit-jupiter 5.8.2 test
.github/workflows/build.yml actions
  • actions/checkout v3 composite
  • actions/setup-java v3 composite
  • actions/upload-artifact v3 composite
  • cicirello/jacoco-badge-generator v2 composite
.github/workflows/codeql-analysis.yml actions
  • actions/checkout v3 composite
  • actions/setup-java v3 composite
  • github/codeql-action/analyze v2 composite
  • github/codeql-action/autobuild v2 composite
  • github/codeql-action/init v2 composite
.github/workflows/docs.yml actions
  • actions/checkout v3 composite
  • actions/setup-java v3 composite
  • cicirello/generate-sitemap v1 composite
  • cicirello/javadoc-cleanup v1 composite
.github/workflows/manual-deploy-github-only.yml actions
  • actions/checkout v3 composite
  • actions/setup-java v3 composite
.github/workflows/manual-deploy.yml actions
  • actions/checkout v3 composite
  • actions/setup-java v3 composite
.github/workflows/maven-publish.yml actions
  • actions/checkout v3 composite
  • actions/setup-java v3 composite

Score: 7.7142311448490855