Run results for: Arrays Destructuring

Run details:

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: Chrome 121

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Spread	0.4 Ops/sec
Array.from	0.5 Ops/sec

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`);