edit-distance-linear: Efficient implementation of the Levenshtein edit distance in linear memory.
Please see the README on GitHub at https://github.com/0xd34df00d/edit-distance-linear#readme
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| llvm | Use the LLVM code generator (strongly recommended) | Disabled |
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- edit-distance-linear-0.2.0.2.tar.gz [browse] (Cabal source package)
- Package description (as included in the package)
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| Versions [RSS] | 0.2.0.1, 0.2.0.2 |
|---|---|
| Change log | ChangeLog.md |
| Dependencies | array, base (>=4.7 && <5), bytestring, edit-distance-linear [details] |
| License | BSD-3-Clause |
| Copyright | 2019 Georg Rudoy |
| Author | Georg Rudoy |
| Maintainer | 0xd34df00d@gmail.com |
| Category | Algorithms |
| Home page | https://github.com/0xd34df00d/edit-distance-linear#readme |
| Bug tracker | https://github.com/0xd34df00d/edit-distance-linear/issues |
| Source repo | head: git clone https://github.com/0xd34df00d/edit-distance-linear |
| Uploaded | by 0xd34df00d at 2019-12-08T22:44:39Z |
| Distributions | NixOS:0.2.0.2 |
| Executables | edit-distance-linear-exe |
| Downloads | 823 total (4 in the last 30 days) |
| Rating | (no votes yet) [estimated by Bayesian average] |
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| Status | Docs available [build log] Last success reported on 2019-12-08 [all 1 reports] |
Readme for edit-distance-linear-0.2.0.2
[back to package description]edit-distance-linear
The pure Haskell implementation of the Levenshtein edit distance, with linear space complexity.
Comparison
There are already several other existing implementations, but the goals and design decisions vary. In particular, this package is intended to be used to:
- compare long strings (think tens of thousands of characters), driving the implementation to live in the
STmonad and aim at linear space complexity to lower GC pressure; - not care about Unicode, thus accepting
ByteStrings and comparing them byte-by-byte rather than character-by-character (or glyph-by-glyph, or whatever is the right notion of an edit for Unicode).
Among the alternatives:
- text-metrics — uses a similar algorithm, but cares about Unicode, making it 4-5 times slower.
- edit-distance — uses a very different algorithm (which we might implement here one day with huge potential benefits), which tends to consume more memory (I'm not up for estimating its space asymptotics, though).