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Run results for:
Merge two arrays - Array.prototype.concat vs spread operator
Compare the new ES6 spread operator with the traditional concat() method
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<iframe src="https://measurethat.net/Embed?id=488177" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:120.0) Gecko/20100101 Firefox/120.0
Browser:
Firefox 120
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
2 years ago
Benchmark engine:
Benchmark.js
Array.prototype.concat
21.4M/s
spread operator
10.7M/s
View exact numbers
Test name
Executions per second
✓
Array.prototype.concat
21,375,238 Ops/sec
spread operator
10,682,113 Ops/sec
Tests:
Array.prototype.concat
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ] other = other.concat(params);
spread operator
var params = [ "hello", true, 7 ] var other = [ 1, 2, ...params ] var other2 = [ ...other, ...params ]