Run results for: nullish tests - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36 Edg/88.0.705.63

Browser: Chrome 88

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
loose equals undefined	3598028.0 Ops/sec
loose not-equals undefined	3614908.5 Ops/sec
strict equals undefined	3612268.2 Ops/sec
strict not-equals undefined	3619184.5 Ops/sec
loose equals null	12086224.0 Ops/sec
loose not-equals null	12105827.0 Ops/sec
strict equals null	12116461.0 Ops/sec
strict not-equals null	12087243.0 Ops/sec
typeof	12080818.0 Ops/sec
in	12047347.0 Ops/sec
hasOwnProperty	10964670.0 Ops/sec
bool	12066025.0 Ops/sec

Script Preparation code:

var obj = {};

Tests:

loose equals undefined
obj['a'] == undefined;
loose not-equals undefined
obj['a'] != undefined;
strict equals undefined
obj['a'] === undefined;
strict not-equals undefined
obj['a'] !== undefined;
loose equals null
obj['a'] == null;
loose not-equals null
obj['a'] != null;
strict equals null
obj['a'] === null
strict not-equals null
obj['a'] !== null
typeof
typeof obj['a'] === 'undefined'
in
'a' in obj;
hasOwnProperty
obj.hasOwnProperty('a');
bool
!!obj['a']