Run results for: Create Array Filled with Undefined - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.81 Safari/537.36 OPR/80.0.4170.61

Browser: Opera 80

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Array.apply	2820.8 Ops/sec
Array.concat	2242.1 Ops/sec
Array.fill	41320.3 Ops/sec
Custom function	3069.2 Ops/sec

Script Preparation code:

var length = 10000;

Tests:

Array.apply
const array = Array.apply(null, { length });
Array.concat
const array = [].concat.apply([], { length });
Array.fill
const array = []; array.length = length; array.fill(undefined);
Custom function
const func = (...args) => args; func.apply(null, { length });