Run results for: array check vs string check

Run details:

User agent: Mozilla/5.0 (Linux; Android 12; M2102J20SG) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.5481.192 Mobile Safari/537.36 OPR/74.1.3922.71199

Browser: Opera Mobile 74

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
isArray	5435680.0 Ops/sec
typeof String	1360583296.0 Ops/sec

Script Preparation code:

const a = [1];
const b = 'hello';

Tests:

isArray
const a = [1]; if (Array.isArray(a)) { return true; }
typeof String
const b = 'hello'; if (typeof b === 'string') { return true; }

Run results for: array check vs string check

What's faster, checking if a variable is an array or a string?

isArray

typeof String