stm-containers

Containers for STM

https://github.com/nikita-volkov/stm-containers

LTS Haskell 24.16:	1.2.1.1
Stackage Nightly 2025-10-24:	1.2.1.1
Latest on Hackage:	1.2.1.1

See all snapshots stm-containers appears in

MIT licensed and maintained by Nikita Volkov

This version can be pinned in stack with:stm-containers-1.2.1.1@sha256:ad0d5e6d64b30aa27e0d5c14d304f15dc61cc414b771e30842e118c2b0a4bad5,3494

Module documentation for 1.2.1.1

StmContainers

Depends on 7 packages(full list with versions):

base, deferred-folds, focus, hashable, list-t, stm-hamt, transformers

Used by 2 packages in nightly-2025-10-24(full list with versions):

keter-rate-limiting-plugin, slave-thread

This library is based on an STM-specialized implementation of Hash Array Mapped Trie. It provides efficient implementations of Map, Set and other data structures, which starting from version 1 perform even better than their counterparts from "unordered-containers", but also scale well on concurrent access patterns. . For details on performance of the library, which are a bit outdated, see this blog post.