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Run results for:
Array concat vs spread operator vs push vs object assign
Compare the new ES6 spread operator with the traditional concat() method and push
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<iframe src="https://measurethat.net/Embed?id=626018" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.6 Safari/605.1.15
Browser:
Safari 18
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
6 months ago
Benchmark engine:
Benchmark.js
spread operator
523.7M/s
Array.prototype.concat
40.0M/s
Push
14.9M/s
Object assign
9.4M/s
View exact numbers
Test name
Executions per second
✓
spread operator
523,718,272 Ops/sec
Array.prototype.concat
40,024,668 Ops/sec
Push
14,904,953 Ops/sec
Object assign
9,432,858 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);
Object assign
var params = [ "hello", true, 7 ]; var other = Object.assign([], params);