Benchmark: instanceof vs typeof vs attribute - MeasureThat.net

Script Preparation code:

var obj = {a:2};

Tests:

instanceof
obj instanceof Object
typeof
typeof obj === 'object'
typeof no function
typeof obj === 'object' && typeof obj !== 'function'
typeof and test attribute
typeof obj === 'object' && obj.a
attribte
obj.a !== undefined

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
instanceof
typeof
typeof no function
typeof and test attribute
attribte

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Linux; Android 12; SM-A725F) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Mobile Safari/537.36

Browser/OS: Chrome Mobile 106 on Android

View result in a separate tab

Test name	Executions per second
instanceof	1827554.0 Ops/sec
typeof	5609619.0 Ops/sec
typeof no function	2779546.0 Ops/sec
typeof and test attribute	2826649.0 Ops/sec
attribte	1855128.0 Ops/sec