Run results for: lodash difference vs reduce vs filter vs find

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Safari/537.36

Browser: Chrome 102

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
lodash	16573.5 Ops/sec
reduce	567.9 Ops/sec
set filter	25495.6 Ops/sec
find filter	876.5 Ops/sec

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var list_1 = []
var list_2 = []


for(var i =0;i<1000;i++){
  list_1.push(Math.random().toString(36).slice(2, 7));
}

for(var i =0;i<200;i++){
  list_2.push(Math.random().toString(36).slice(2, 7));
}

Tests:

lodash
_.difference(list_1, list_2)
reduce
var excludeMap = list_2.reduce((all, item) => ({ ...all, [item]: true }), {}); list_1.filter((item) => !excludeMap?.[item]);
set filter
var toRemove = new Set(list_2); list_1.filter(i => !toRemove.has(i))
find filter
list_1.filter(i => list_2.find(i2 => i2 === i))

Run results for: lodash difference vs reduce vs filter vs find

exclude all the elements for one array from another array

lodash

reduce

set filter

find filter