Run results for: Array.prototype.concat vs spread oper

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_7_10 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.6 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 16

Operating system: iOS 16.7.10

Device Platform: Mobile

Date tested: one month ago

Test name	Executions per second
Array.prototype.concat	2181.3 Ops/sec
spread operator	2386.7 Ops/sec

Script Preparation code:

let big = (new Array(1e5)).fill(99);

​x
 
let big = (new Array(1e5)).fill(99);​

Tests:

Array.prototype.concat
var other = big.concat(2);
var other = big.concat(2);
spread operator
var other = [ ...big, 2 ]
var other = [ ...big, 2 ]

Run results for: Array.prototype.concat vs spread oper

Compare the new ES6 spread operator with the traditional concat() method

Array.prototype.concat

spread operator