Run results for: Custom Array Equality Function vs Lodash.isEqualWith Equality Comparison for Shallow Array of Strings.

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Arrays are equal	3168949.0 Ops/sec
_.isEqualWith	5066831.5 Ops/sec

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

Script Preparation code:

window.foo = ['cat', 'dog', 'bird'];
window.bar = ['cat', 'dog', 'bird'];

function arraysAreEqual(
    firstArray,
    secondArray,
    options,
) {
    if (firstArray.length !== secondArray.length) {
        return false;
    }

    const {
        comparator,
        orderSensitive = true
    } = options;

    const first = orderSensitive ? firstArray : [...firstArray.sort()];
    const second = orderSensitive ? secondArray : [...secondArray.sort()];

    return first.every((firstItem, index) => {
        const secondItem = second[index];
        if (comparator != null) {
            return comparator(firstItem, secondItem);
        }
        return firstItem === secondItem;
    });
}

Tests:

Arrays are equal
arraysAreEqual(window.foo, window.bar, {comparator: (a, b) => a===b, orderSensitive: false})
_.isEqualWith
_.isEqualWith(window.foo, window.bar, (a, b) => a===b)

Run results for: Custom Array Equality Function vs Lodash.isEqualWith Equality Comparison for Shallow Array of Strings.

Test on isEqualWith performance

Arrays are equal

_.isEqualWith