Run results for: typeof vs instanceof vs constructor

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser: Chrome 135

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

typeof check

904K/s

instanceof check

475K/s

constructor check

79K/s

View exact numbers

Script Preparation code:

function Ticket(id) {
  this._id = id;
}

var testTicket = new Ticket(1);
var count = 1000;

Tests:

typeof check
for (var i = 0; i < count; i += 1) { if (typeof testTicket === 'object') { continue; } }
instanceof check
for (var i = 0; i < count; i += 1) { if (testTicket instanceof Ticket) { continue; } }
constructor check
for (var i = 0; i < count; i += 1) { if (testTicket.constructor.name === 'Ticket') { continue; } }