Benchmark Run Result for: Array.prototype.slice vs spread operator with length limit

Array.prototype.slice vs spread operator with length limit

Compare the ES6 spread operator with the traditional slice() method

Date tested: 2 years ago

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36

Test name	Executions per second
Array.prototype.slice	1045389.1 Ops/sec
spread operator	191126.2 Ops/sec

Benchmark definition (click to collapse):

Script Preparation code:

var limit = 1000
var a = new Array(limit).fill(limit);

Tests:

Array.prototype.slice
var b = a.slice(); b.unshift(limit);
spread operator
var b = [ limit, ...a ];

Open this result on MeasureThat.net