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- # leven [](https://travis-ci.org/sindresorhus/leven)
- > Measure the difference between two strings<br>
- > The fastest JS implementation of the [Levenshtein distance](http://en.wikipedia.org/wiki/Levenshtein_distance) algorithm
- ## Install
- ```
- $ npm install --save leven
- ```
- ## Usage
- ```js
- const leven = require('leven');
- leven('cat', 'cow');
- //=> 2
- ```
- ## Benchmark
- ```
- $ npm run bench
- ```
- ```
- 401,487 op/s » leven
- 371,707 op/s » talisman
- 264,191 op/s » levenshtein-edit-distance
- 152,923 op/s » fast-levenshtein
- 57,267 op/s » levenshtein-component
- 19,915 op/s » levdist
- 21,802 op/s » ld
- 18,079 op/s » natural
- 11,761 op/s » levenshtein
- ```
- ## Related
- - [leven-cli](https://github.com/sindresorhus/leven-cli) - CLI for this module
- ## License
- MIT © [Sindre Sorhus](https://sindresorhus.com)
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