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Run results for:
spread vs concat vs unshift
spread vs concat vs unshift
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=606243" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:138.0) Gecko/20100101 Firefox/138.0
Browser:
Firefox 138
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
one year ago
arrayUnshift123
701K/s
arrayConcat123
98/s
arraySpread123
24/s
View exact numbers
Test name
Executions per second
✓
arrayUnshift123
700,822 Ops/sec
arrayConcat123
98 Ops/sec
arraySpread123
24 Ops/sec
Script Preparation code:
var array = [1,2,3];
Tests:
arrayUnshift123
array.unshift(0);
arrayConcat123
array = array.concat([0])
arraySpread123
array = [0, ...array]