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Run results for:
Array concat vs spread operator vs push with more data
Compare the new ES6 spread operator with the traditional concat() method and push
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<iframe src="https://measurethat.net/Embed?id=597303" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:136.0) Gecko/20100101 Firefox/136.0
Browser:
Firefox 136
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Array.prototype.concat
265K/s
spread operator
75K/s
Push
33K/s
View exact numbers
Test name
Executions per second
✓
Array.prototype.concat
264,782 Ops/sec
spread operator
75,445 Ops/sec
Push
32,985 Ops/sec
Script Preparation code:
var array1 = [...Array(1000).keys()] var array2 = array1.map(i => i * 10)
Tests:
Array.prototype.concat
const result = array1.concat(array2);
spread operator
const result = [ ...array1, ...array2 ]
Push
const result = array1.push(...array2);