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Run results for:
Array concat vs spread operator vs push with long arrays
extends https://www.measurethat.net/Benchmarks/Show/4223
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<iframe src="https://measurethat.net/Embed?id=496266" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0
Browser:
Firefox 121
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Array.prototype.push
7.0M/s
Array.prototype.concat
4K/s
spread operator
468/s
View exact numbers
Test name
Executions per second
✓
Array.prototype.push
6,964,744 Ops/sec
Array.prototype.concat
3,857 Ops/sec
spread operator
468 Ops/sec
Script Preparation code:
const ARRAY_LEN = 100000; var array1 = Array(ARRAY_LEN, 'fill'); var array2 = Array(ARRAY_LEN, 'fill');
Tests:
Array.prototype.concat
array1 = array1.concat(array2);
spread operator
array1 = [ ...array1, ...array2 ]
Array.prototype.push
array1.push(...array2);