Benchmark: Arrays Destructuring

HTML Preparation code:

<!DOCTYPE html>
<html>
<head>
    <title>Array.from vs Spread Operator Benchmark</title>
</head>
<body>
</body>
</html>

Script Preparation code:

        for (let i = 0; i < 10000; i++) {
            const elem = document.createElement('div');
            elem.className = 'someClassedElements';
            document.body.appendChild(elem);
        }

Tests:

Spread
function benchmarkSpreadOperator() { const start = performance.now(); for (let i = 0; i < 1000; i++) { const elements = [...document.querySelectorAll('.someClassedElements')]; } const end = performance.now(); return end - start; } const spreadOperatorTime = benchmarkSpreadOperator(); console.log(`Spread Operator: ${spreadOperatorTime}ms`);
Array.from
function benchmarkArrayFrom() { const start = performance.now(); for (let i = 0; i < 1000; i++) { const elements = Array.from(document.querySelectorAll('.someClassedElements')); } const end = performance.now(); return end - start; } const arrayFromTime = benchmarkArrayFrom(); console.log(`Array.from: ${arrayFromTime}ms`);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Spread
Array.from

Fastest: N/A

Slowest: N/A

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Latest run results:

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

User agent: Mozilla/5.0 (Android 13; Mobile; rv:122.0) Gecko/122.0 Firefox/122.0

Browser/OS: Firefox Mobile 122 on Android

View result in a separate tab

Test name	Executions per second
Spread	0.7 Ops/sec
Array.from	0.7 Ops/sec

Arrays Destructuring (version: 0)

Comparing performance of: Spread vs Array.from

Created: 2 months ago by: Guest

Jump to the latest result

Spread

Array.from

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A