Run results for: Loop vs Stringify Array Comparison

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36 Edg/122.0.0.0

Browser: Chrome 122

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

loop same

3.3M/s

loop similar

3.2M/s

loop different

3.2M/s

stringify same

57K/s

stringify similar

57K/s

stringify different

57K/s

View exact numbers

Test name	Executions per second
✓ loop same	3,260,706 Ops/sec
loop similar	3,215,914 Ops/sec
loop different	3,209,328 Ops/sec
stringify same	57,322 Ops/sec
stringify similar	57,032 Ops/sec
stringify different	56,952 Ops/sec

Script Preparation code:

window.fdeq = function equal(a, b) {
    if (a.length !== b.length) return false;
    for (let i = 0; i < a.length; i++) {
        if (a[i] !== b[i]) return false;
    }
    return true;
};

window.foo = Array.from({length: 40}, () => ([Math.random() * 40, Math.random() * 40]));
window.foo2 = JSON.parse(JSON.stringify(window.foo.slice()));
window.fox = JSON.parse(JSON.stringify(window.foo.slice(0, 30))).concat(Array.from({length: 10}, () => ([Math.random() * 40, Math.random() * 40])));
window.bar = Array.from({length: 40}, () => ([Math.random() * 40, Math.random() * 40]));

Tests:

loop same
fdeq(window.foo, window.foo2);
loop similar
fdeq(window.foo, window.fox);
loop different
fdeq(window.foo, window.bar);
stringify same
JSON.stringify(window.foo) === JSON.stringify(window.foo2)
stringify similar
JSON.stringify(window.foo) === JSON.stringify(window.fox)
stringify different
JSON.stringify(window.foo) === JSON.stringify(window.bar)