Benchmark: Undefined testing including ! - MeasureThat.net

Script Preparation code:

var x;

Tests:

typeof x === "undefined"
typeof x === "undefined"
x === undefined
x === undefined
x == undefined
x == undefined
x == null
x == null
!x
!x

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
typeof x === "undefined"
x === undefined
x == undefined
x == null
!x

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 7 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36 OPR/102.0.0.0

Browser/OS: Opera 102 on Windows

View result in a separate tab

Test name	Executions per second
typeof x === "undefined"	13208730.0 Ops/sec
x === undefined	4919502.0 Ops/sec
x == undefined	4981228.0 Ops/sec
x == null	13932450.0 Ops/sec
!x	13954640.0 Ops/sec