Run results for: Object.keys vs for ... in

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:144.0) Gecko/20100101 Firefox/144.0

Browser: Firefox 144

Operating system: Linux

Device Platform: Desktop

Date tested: 6 months ago

Test name	Executions per second
window.objectKeys	3552904.0 Ops/sec
window.isEmpty	3271011.0 Ops/sec

Script Preparation code:

window.objectKeys = (value) => {
    return Object.keys(value).length > 0
}

window.isEmpty = (value) => {
    if (!value) {
        return true;
    }

    for (const key in value) {
        if (Object.hasOwn(value, key)) {
            return false;
        }
    }

    return true;
}

Tests:

window.objectKeys
const obj = { mr: 1, ml: 1, p: 1 } window.objectKeys(obj)
window.isEmpty
const obj = { mr: 1, ml: 1, p: 1 } window.isEmpty(obj)