fast-dice-coefficient

Fastest implementation of Sørensen–Dice coefficient. This implementation has linear time complexity O(n), as opposed to other solutions: string-similarity, dice-coefficient, etc., running in quadratic time O(n2).

This algorithm can be used to compute the similarity between strings. It return a fraction between 0 and 1, where 0 indicates no match and 1 indicates full match.

Install

$ npm install fast-dice-coefficient --save

Usage

var dice = require('fast-dice-coefficient');

console.log(dice('javascript', 'coffeescript'));
//=> 0.5

Benchmark

200 samples on i7-3667u with 8GB RAM.

Using two test-strings with 100 characters each.

First 4 packages uses dice-coefficient and last uses levenshtein.

| Package | ops/sec | |-------------------------|---------| | stringSimilarity | 7,590 | | natural.DiceCoefficient | 11,117 | | dice-coefficient | 14,732 | | fast-dice-coefficient | 44,067 | | fast-levenshtein | 4,495 |