what is the best persistent collection library?

• kotlinx.collections.immutable

  10 1,073 7.3 Kotlin

  Immutable persistent collections for Kotlin

  

kotlinx.collections.immutable it's a kotlin-focused collections library, but it can absolutely work with Java, especially because it extends the standard collection interfaces, so you can simply get an iterator from it

• java-immutable-collections

  2 41 8.3 Java

  Efficient Immutable/Persistent Collections for Java

I'm not sure which one is best, but I always wanted to give https://github.com/brianburton/java-immutable-collections and/or https://github.com/lacuna/bifurcan (which, strictly speaking, does not satisfy your requirements, read the description).

• WorkOS

  workos.com sponsored

  The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  

• bifurcan

  3 957 4.8 Java

  functional, durable data structures

  

I'm not sure which one is best, but I always wanted to give https://github.com/brianburton/java-immutable-collections and/or https://github.com/lacuna/bifurcan (which, strictly speaking, does not satisfy your requirements, read the description).

• MapDB

  5 4,829 0.0 Java

  MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine.

Anyway, without further ado, I found MapDB (https://github.com/jankotek/mapdb) which does exactly that. Of course, they also provide their own Java collection implementations as well, so I suspect using it with Vavr would be a poor idea, but it is very cool in its own right anyway. Of course, there is also Apache Derby and HSQLDB, and those great options with a long history as well. I haven't played with these in a while though, so I might give them a try again soon for some personal stuff.

Suggest a related project