MIT licensed by Michael Schröder
Maintained by

Module documentation for

A non-blocking concurrent map implementation based on lock-free concurrent hash tries (aka Ctries).


0.2 (September 2017)

  • Change return types of insertIfAbsent, insert and delete to indicate whether or not a value has been inserted/deleted. This is a breaking change, but it should be trivial to adapt your code. There are no changes in performance. Thanks to Tom Shackell for proposing this change. (April 2016)

  • Add insertIfAbsent ( (December 2015)

  • Eliminate a redundant import warning on GHC 7.10
  • Loosen dependency bounds (October 2014)

  • Use newer versions of base and atomic-primops
  • Update benchmarks for criterion 1.0
Depends on 4 packages:
Used by 2 packages:
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