Benchmark: declare test - MeasureThat.net

Script Preparation code:

var func1 = function(obj) {
	if (obj !== undefined) { return obj.x; }
}
var func2 = function(obj) {
	if (obj) { return obj.x; }
}

var ar1 = [];
var ar2 = [];

for (let i = 0; i < 1e5; i++) {
	ar1.push(Math.random() < 0.5 ? void 0 : {'x': Math.random()});
	ar2.push(Math.random() < 0.5 ? void 0 : {'x': Math.random()});
}

for (let i = 0; i < 1e3; ++i) {
	func1(Math.random() < 0.5 ? void 0 : {'x': Math.random()});
	func2(Math.random() < 0.5 ? void 0 : {'x': Math.random()});
}

Tests:

func2
for (let i = 0; i < 1e5; ++i) { func2(ar1[i]); }
func1
for (let i = 0; i < 1e5; ++i) { func1(ar1[i]); }

Historical Performance Data aggregated from 22 community runs

Desktop Results:

Chrome 22 runs

func2

65/s

func1

34/s

Fastest: func2 (1.9x faster)

View exact numbers

✓ func2: 65 ops/sec
• func1: 34 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
func2
func1

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser/OS: Chrome 121 on Windows

View result in a separate tab

func2

65/s

func1

34/s

View exact numbers

Test name	Executions per second
✓ func2	65 Ops/sec
func1	34 Ops/sec

declare test (version: 8) Benchmark.js

Comparing performance of: `func2 vs func1`

Created: 2 years ago by: Registered User

Go to the latest result

func2

func1

Historical Performance Data aggregated from 22 community runs

Desktop Results:

Chrome 22 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

declare test (version: 8) Benchmark.js

Comparing performance of: func2 vs func1

Created: 2 years ago by: Registered User

Go to the latest result

func2

func1

Historical Performance Data aggregated from 22 community runs

Desktop Results:

Chrome 22 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `func2 vs func1`