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