Run results for: Loop vs Stringify Array Comparison

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/118.0

Browser: Firefox 118

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
loop same	2199047.0 Ops/sec
loop similar	2111430.5 Ops/sec
loop different	1970312.8 Ops/sec
stringify same	22734.6 Ops/sec
stringify similar	23049.6 Ops/sec
stringify different	22806.0 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)

Run results for: Loop vs Stringify Array Comparison

loop same

loop similar

loop different

stringify same

stringify similar

stringify different