bytestring-trie: An efficient finite map from (byte)strings to values.

[ bsd3, data, data-structures, library ] [ Propose Tags ]

An efficient finite map from (byte)strings to values.

The implementation is based on big-endian patricia trees, like Data.IntMap. We first trie on the elements of Data.ByteString and then trie on the big-endian bit representation of those elements. Patricia trees have efficient algorithms for union and other merging operations, but they're also quick for lookups and insertions.

If you are only interested in being able to associate strings to values, then you may prefer the hashmap package which is faster for those only needing a map-like structure. This package is intended for those who need the extra capabilities that a trie-like structure can offer (e.g., structure sharing to reduce memory costs for highly redundant keys, taking the submap of all keys with a given prefix, contextual mapping, extracting the minimum and maximum keys, etc.)

Versions [faq] 0.1, 0.1.1, 0.1.2, 0.1.3, 0.1.4, 0.2.2, 0.2.3, 0.2.4,,,
Dependencies base (<2.2 || >=3 && <4.11), binary, bytestring [details]
License BSD-3-Clause
Copyright Copyright (c) 2008--2015 wren gayle romano
Author wren gayle romano
Revised Revision 1 made by phadej at Tue Apr 3 11:29:50 UTC 2018
Category Data, Data Structures
Home page
Source repo head: darcs get
Uploaded by WrenThornton at Sun Apr 5 00:59:43 UTC 2015
Distributions Fedora:, NixOS:
Downloads 15035 total (251 in the last 30 days)
Rating 2.5 (votes: 4) [estimated by rule of succession]
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Status Hackage Matrix CI
Docs available [build log]
Last success reported on 2015-04-05 [all 1 reports]





base-4.0 emits "Prelude deprecated" messages in order to get people to be explicit about which version of base they use.


Use optimized C implementation for indexOfDifference. See notes in Data.Trie.ByteStringInternal.


Applicative functors were added in base-2.0


The bytestring library was included in base-2.0 and base-2.1.1, but for base-1.0 and base-3.0 it was a separate package


Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info


Note: This package has metadata revisions in the cabal description newer than included in the tarball. To unpack the package including the revisions, use 'cabal get'.

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