Benchmark: undefined vs. typeof vs. in vs. hasOwnProperty my3

Script Preparation code:

var obj = { a: 1, b: 2, c: 3, d: 4, e: 5 };

Tests:

ue
undefined !== obj.d;
aue
'undefined' !== typeof obj.d;
eu
obj.d === undefined;
eau
typeof obj.d === 'undefined';

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
ue
aue
eu
eau

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 YaBrowser/20.3.1.195 Yowser/2.5 Yptp/1.23 Safari/537.36

Browser/OS: Yandex Browser 20 on Windows

View result in a separate tab

Test name	Executions per second
ue	4221987.0 Ops/sec
aue	12650610.0 Ops/sec
eu	4261572.0 Ops/sec
eau	12895280.0 Ops/sec

undefined vs. typeof vs. in vs. hasOwnProperty my3 (version: 0)

Object lookup performance

Comparing performance of: ue vs aue vs eu vs eau

Created: 4 years ago by: Guest

Jump to the latest result

ue

aue

eu

eau

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A