Run results for: typeof vs instanceof vs constructor equality check

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser: Chrome 134

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one month ago

Test name	Executions per second
instanceof check	422278.8 Ops/sec
constructor check	519055.8 Ops/sec

Script Preparation code:

function Ticket(id) {
  this._id = id;
}

var testTicket = new Ticket(1);
var count = 1000;

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

Tests:

for (var i = 0; i < count; i += 1) {
  if (testTicket instanceof Ticket) {
	continue;
  }
}

 
for (var i = 0; i < count; i += 1) {  if (testTicket instanceof Ticket) {    continue;  }}

for (var i = 0; i < count; i += 1) {
  if (testTicket.constructor === Ticket) {
	continue;
  }
}

 
for (var i = 0; i < count; i += 1) {  if (testTicket.constructor === Ticket) {    continue;  }}