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Run results for:
Array concat vs spread operator vs push vs forEach vs for...of
Compare the new ES6 spread operator with the traditional concat() method, push, forEach, and for...of
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<iframe src="https://measurethat.net/Embed?id=561247" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36
Browser:
Chrome 129
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
Array.prototype.concat
7799720.5 Ops/sec
spread operator
27628408.0 Ops/sec
Push
33196830.0 Ops/sec
forEach
29688302.0 Ops/sec
for...of
30313030.0 Ops/sec
Tests:
Array.prototype.concat
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ].concat(params);
spread operator
var params = [ "hello", true, 7 ] var other = [ 1, 2, ...params ]
Push
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ].push(...params);
forEach
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ] params.forEach(p => other.push(p));
for...of
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ] for (const p of params) { other.push(p) }