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Add approximate matching documentation

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Anatoly Burakov
2017-02-10 15:46:29 +00:00
committed by Matthew Barr
parent ebe849603b
commit eed2743d04
2 changed files with 94 additions and 3 deletions
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10
doc/dev-reference/performance.rst
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@@ -333,3 +333,13 @@ Similarly, the :c:member:`hs_expr_ext::min_length` extended parameter can be
used to specify a lower bound on the length of the matches for a pattern. Using
this facility may be more lightweight in some circumstances than using the SOM
flag and post-confirming match length in the calling application.
********************
Approximate matching
********************
.. tip:: Approximate matching is an experimental feature.
There is generally a performance impact associated with approximate matching due
to the reduced specificity of the matches. This impact may vary significantly
depending on the pattern and edit distance.