Run results for: lodash vs map 3

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.123 Safari/537.36

Browser: Chrome 85

Operating system: Mac OS X 10.15.6

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
map	3237.5 Ops/sec
lodash	571.7 Ops/sec
arr map	1036.6 Ops/sec
arr map2	2230.7 Ops/sec

HTML Preparation code:

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

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

Script Preparation code:

var arr = [];
var map = new Map();

for (let i = 1; i <= 10000; i++) {
    //let r = makeid(6);
    let r = Math.random().toString(36).substring(8);
    arr.push({
        r
    });
    map.set(r, {
        r
    });
}

 
var arr = [];var map = new Map();​for (let i = 1; i <= 10000; i++) {    //let r = makeid(6);    let r = Math.random().toString(36).substring(8);    arr.push({        r    });    map.set(r, {        r    });}

Tests:

map

let smain = [];
for (let s of map.values() ) {
  smain.push({r: s.r, r2: s.r + s.r})
}

 
let smain = [];for (let s of map.values() ) {  smain.push({r: s.r, r2: s.r + s.r})}

lodash

let main = _.uniqBy(arr, 'r').map(ar => ({r: ar.r, r2: ar.r + ar.r}))

 
let main = _.uniqBy(arr, 'r').map(ar => ({r: ar.r, r2: ar.r + ar.r}))

arr map

let newarr = Array.from(map);
let newarr2 = [];
newarr.forEach((s) => {
  newarr2.push({r: s.r, r2: s.r + s.r})
})

 
let newarr = Array.from(map);let newarr2 = [];newarr.forEach((s) => {  newarr2.push({r: s.r, r2: s.r + s.r})})

arr map2

let newarr = Array.from(map, s => ({r: s.r, r2: s.r + s.r}))

 
let newarr = Array.from(map, s => ({r: s.r, r2: s.r + s.r}))