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Run results for:
Array.prototype.slice vs spread operator vs map
Compare the new ES6 spread operator with the traditional slice() method and map() method
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<iframe src="https://measurethat.net/Embed?id=562782" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 18_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.1 Mobile/15E148 Safari/604.1
Browser:
Mobile Safari 18
Operating system:
iOS 18.1
Device Platform:
Mobile
Date tested:
one year ago
Benchmark engine:
Benchmark.js
spread operator
539.7M/s
Array.prototype.slice
92.2M/s
map
61.9M/s
View exact numbers
Test name
Executions per second
✓
spread operator
539,725,952 Ops/sec
Array.prototype.slice
92,199,568 Ops/sec
map
61,923,552 Ops/sec
Tests:
Array.prototype.slice
var params = [ "hello", true, 7 ]; var other = params.slice();
spread operator
var params = [ "hello", true, 7 ] var other = [ ...params ]
map
var params = [ "hello", true, 7 ] var other = params.map(i => i)