Run results for: undefined - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36

Browser: Chrome 97

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
is a undefined	0.0 Ops/sec
typeof a === undefined	1789995.0 Ops/sec
typeof b === undefined	1790914.0 Ops/sec
b === undefined	0.0 Ops/sec
c === undefined	0.0 Ops/sec
typeof c === undefined	1603261.0 Ops/sec

Website performance monitoring

Script Preparation code:

const body = {a: 2, b: "skljadls"}
const {a, b, c} = body;

Tests:

is a undefined
a === undefined
typeof a === undefined
typeof a === undefined
typeof b === undefined
typeof b === undefined
b === undefined
b === undefined
c === undefined
c === undefined
typeof c === undefined
typeof c === undefined