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Run results for:
Array constructor vs literal performance (10 items)
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<iframe src="https://measurethat.net/Embed?id=501709" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36
Browser:
Chrome 121
Operating system:
Linux
Device Platform:
Desktop
Date tested:
2 years ago
Test name
Executions per second
Array constructor - 10 items
5289670.5 Ops/sec
Array literal - 10 items
13672034.0 Ops/sec
Array literal (assign by index) - 10 items
13746647.0 Ops/sec
Array literal (explicit length) - 10 items
6644610.5 Ops/sec
Tests:
Array constructor - 10 items
var n = 10; var arr = new Array(n); for (var i = 0; i < n; i++) { arr[i] = i; }
Array literal - 10 items
var n = 10; var arr = []; for (var i = 0; i < n; i++) { arr.push(i); }
Array literal (assign by index) - 10 items
var n = 10; var arr = []; for (var i = 0; i < n; i++) { arr[i] = i; }
Array literal (explicit length) - 10 items
var n = 10; var arr = []; arr.length = n; for (var i = 0; i < n; i++) { arr[i] = i; }