{"id":54540,"library":"fastutil","title":"Fastutil","description":"Fastutil extends the Java Collections Framework with type-specific maps, sets, lists, and queues for improved memory and performance.","status":"active","version":"8.5.18","language":"java","source_language":null,"source_url":"https://github.com/vigna/fastutil","tags":["collections","performance","type-specific","java"],"install":[{"cmd":"<dependency>\n  <groupId>it.unimi.dsi</groupId>\n  <artifactId>fastutil</artifactId>\n  <version>8.5.18</version>\n</dependency>","lang":"xml","label":"Maven"},{"cmd":"implementation 'it.unimi.dsi:fastutil:8.5.18'","lang":"groovy","label":"Gradle"}],"dependencies":[],"imports":[{"symbol":"IntArrayList","correct":"it.unimi.dsi.fastutil.ints.IntArrayList"}],"quickstart":{"code":"import it.unimi.dsi.fastutil.ints.IntArrayList;\n\nIntArrayList list = new IntArrayList();\nlist.add(1);\nlist.add(2);\nSystem.out.println(\"List: \" + list);","lang":"java","description":"Creates a type-specific IntArrayList and adds elements."},"warnings":[{"fix":"Exclude fastutil-core.jar from dependencies when using fastutil.jar.","message":"Avoid mixing fastutil-core.jar with the full fastutil.jar; exclude fastutil-core if both are present.","severity":"gotcha","affected_versions":"*"}],"env_vars":null,"search_vec":"'collect':6,22 'extend':3 'fastutil':1,2 'framework':7 'improv':18 'java':5,27 'list':14 'map':12 'memori':19 'perform':21,23 'queue':16 'set':13 'specif':11,26 'type':10,25 'type-specif':9,24","created_at":"2026-06-15T09:11:17.527142+00:00","updated_at":"2026-06-15T09:11:17.527142+00:00","problems":[],"ecosystem":"maven","meta_description":null,"install_score":null,"quickstart_score":null,"quickstart_tag":null,"pypi_latest":null,"cli_name":null,"cli_version":null,"type":"library","homepage":"http://fastutil.di.unimi.it/","github":"https://github.com/vigna/fastutil","docs":"https://appdoc.app/artifact/it.unimi.dsi/fastutil/","changelog":null,"pypi":null,"npm":null,"openapi_spec":null,"status_page":null,"smithery":null,"categories":["utility"],"base_url":null,"auth_type":null,"provenance":{"verified_status":null,"verified_at":null,"last_verified":"2026-06-15","next_check":"2026-12-12","install_tag":null}}