Benchmark: nullish tests - MeasureThat.net

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']

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
loose equals undefined
loose not-equals undefined
strict equals undefined
strict not-equals undefined
loose equals null
loose not-equals null
strict equals null
strict not-equals null
typeof
in
hasOwnProperty
bool

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 11_2_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36

Browser/OS: Chrome 88 on Mac OS X 11.2.0

View result in a separate tab

Test name	Executions per second
loose equals undefined	4092863.0 Ops/sec
loose not-equals undefined	4540507.0 Ops/sec
strict equals undefined	4476513.0 Ops/sec
strict not-equals undefined	4419200.0 Ops/sec
loose equals null	14104510.0 Ops/sec
loose not-equals null	14046250.0 Ops/sec
strict equals null	14094020.0 Ops/sec
strict not-equals null	13980410.0 Ops/sec
typeof	12168670.0 Ops/sec
in	13355760.0 Ops/sec
hasOwnProperty	12488010.0 Ops/sec
bool	14078610.0 Ops/sec