# leven [![Build Status](https://travis-ci.org/sindresorhus/leven.svg?branch=master)](https://travis-ci.org/sindresorhus/leven) > Measure the difference between two strings
> One of the fastest JS implementations of the [Levenshtein distance](https://en.wikipedia.org/wiki/Levenshtein_distance) algorithm ## Install ``` $ npm install leven ``` ## Usage ```js const leven = require('leven'); leven('cat', 'cow'); //=> 2 ``` ## Benchmark ``` $ npm run bench ``` ``` 165,926 op/s » leven 164,398 op/s » talisman 1,044 op/s » levenshtein-edit-distance 628 op/s » fast-levenshtein 497 op/s » levenshtein-component 195 op/s » ld 190 op/s » levenshtein 168 op/s » levdist 10 op/s » natural ``` ## Related - [leven-cli](https://github.com/sindresorhus/leven-cli) - CLI for this module ## License MIT © [Sindre Sorhus](https://sindresorhus.com)