Run results for: Undefined testing

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36 OPR/41.0.2353.69

Browser: Opera 41

Operating system: Windows

Device Platform: Other

Date tested: 7 years ago

Test name	Executions per second
typeof x === "undefined"	7456274.0 Ops/sec
x === undefined	2807675.0 Ops/sec

Script Preparation code:

var x;
var y = {};

Tests: