MeasureThat.net

Run results for: Set vs Filter vs forEach for unique

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36 Edg/131.0.0.0
Chrome 131
Mac OS X 10.15.7
Desktop
5 months ago
Test name Executions per second
Set spread 1312297.8 Ops/sec
Array from set 1220334.4 Ops/sec
Filter 259984.4 Ops/sec
Basic forEach 3053994.5 Ops/sec
Script Preparation code:
AخA
 
var array = Array.from({length: 40}, () => Math.floor(Math.random() * 140));
Tests:

  • Set spread

     
    const f = [... new Set(array)]

  • Array from set

     
    const s = new Set(array)
    const l = Array.from(s)

  • Filter

     
    const b = array.filter((i,index) => array.indexOf(i)=== index)

  • Basic forEach

    ​x
     
    const set = {}
    ​
    array.forEach(val => set.hasOwnProperty(val) ? set[val] = true : '')
    const b = Object.keys(set)