Fast deep equal
npm install @blumintinc/fast-deep-equal
``bash`
npm install fast-deep-equal
- ES5 compatible
- works in node.js (8+) and browsers (IE9+)
- checks equality of Date and RegExp objects by value.
ES6 equal (require('fast-deep-equal/es6')) also supports:
- Maps
- Sets
- Typed arrays
`javascript
import equal from 'fast-deep-equal';
console.log(equal({foo: 'bar'}, {foo: 'bar'})); // true
`
`javascript
const equal = require('fast-deep-equal');
console.log(equal({foo: 'bar'}, {foo: 'bar'})); // true
`
To support ES6 Maps, Sets and Typed arrays equality use:
`javascript
// ESM
import equal from 'fast-deep-equal/es6';
// CommonJS
const equal = require('fast-deep-equal/es6');
console.log(equal(new Int16Array([1, 2]), new Int16Array([1, 2]))); // true
`
To use with React (avoiding the traversal of React elements' _owner
property that contains circular references and is not needed when
comparing the elements - borrowed from react-fast-compare):
`javascript
// ESM
import equal from 'fast-deep-equal/react';
import es6Equal from 'fast-deep-equal/es6/react';
// CommonJS
const equal = require('fast-deep-equal/react');
const es6Equal = require('fast-deep-equal/es6/react');
`
Node.js v12.6.0:
`
fast-deep-equal x 261,950 ops/sec ±0.52% (89 runs sampled)
fast-deep-equal/es6 x 212,991 ops/sec ±0.34% (92 runs sampled)
fast-equals x 230,957 ops/sec ±0.83% (85 runs sampled)
nano-equal x 187,995 ops/sec ±0.53% (88 runs sampled)
shallow-equal-fuzzy x 138,302 ops/sec ±0.49% (90 runs sampled)
underscore.isEqual x 74,423 ops/sec ±0.38% (89 runs sampled)
lodash.isEqual x 36,637 ops/sec ±0.72% (90 runs sampled)
deep-equal x 2,310 ops/sec ±0.37% (90 runs sampled)
deep-eql x 35,312 ops/sec ±0.67% (91 runs sampled)
ramda.equals x 12,054 ops/sec ±0.40% (91 runs sampled)
util.isDeepStrictEqual x 46,440 ops/sec ±0.43% (90 runs sampled)
assert.deepStrictEqual x 456 ops/sec ±0.71% (88 runs sampled)
The fastest is fast-deep-equal
`
To run benchmark (requires node.js 6+):
`bash``
npm run benchmark
__Please note__: this benchmark runs against the available test cases. To choose the most performant library for your application, it is recommended to benchmark against your data and to NOT expect this benchmark to reflect the performance difference in your application.
fast-deep-equal package is a part of Tidelift enterprise subscription - it provides a centralised commercial support to open-source software users, in addition to the support provided by software maintainers.
To report a security vulnerability, please use the
Tidelift security contact.
Tidelift will coordinate the fix and disclosure. Please do NOT report security vulnerability via GitHub issues.