Run results for: DifferenceBy vs native

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:135.0) Gecko/20100101 Firefox/135.0

Browser: Firefox 135

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Native

7.7M/s

_.differenceBy

2.7M/s

View exact numbers

Test name	Executions per second
✓ Native	7,720,904 Ops/sec
_.differenceBy	2,726,302 Ops/sec

Script Preparation code:

var array1 = [{name: 'foo', value: 3},{name:'bar', value: 4},{name:'x', value: 0}]
var array2 = [{name: 'foo', type: 'a'},{name:'baz', type:'b'},{name:'x', type:'c'}]

Tests:

_.differenceBy
var difference = _.differenceBy(array1, array2, 'name')
Native
if (array1) { if (array2) { var difference = [array1.map(a => a.name), array2.map(a => a.name)] .reduce((a, b) => a.filter(c => !b.includes(c))) } else { array1 } }