Run results for: nullish tests - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
loose equals undefined	58636224.0 Ops/sec
loose not-equals undefined	61455116.0 Ops/sec
strict equals undefined	61481408.0 Ops/sec
strict not-equals undefined	58116084.0 Ops/sec
loose equals null	60420380.0 Ops/sec
loose not-equals null	63533808.0 Ops/sec
strict equals null	64481352.0 Ops/sec
strict not-equals null	60530664.0 Ops/sec
typeof	61133860.0 Ops/sec
in	61029332.0 Ops/sec
hasOwnProperty	38365400.0 Ops/sec
bool	57719076.0 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']