Run results for: Lodash cloneDeep vs structuredClone vs Klona 3

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
✓ Klona	4,147,875 Ops/sec
Lodash	1,687,285 Ops/sec
Native structuredClone	719,682 Ops/sec

Script Preparation code:

var MyObject = {
  description: 'Creates a deep copy of source, which should be an object or an array.',
  myNumber: 123456789,
  myBoolean: true,
  jayson: {
    stringify: 'JSON.stringify() method converts a JavaScript value to a JSON string....',
    parse: 'JSON.parse() method parses a JSON string...'
  }
};
function set(obj, key, val) {
	if (typeof val.value === 'object') val.value = klona(val.value);
	if (!val.enumerable || val.get || val.set || !val.configurable || !val.writable || key === '__proto__') {
		Object.defineProperty(obj, key, val);
	} else obj[key] = val.value;
}

function klona(val) {
	var k, out, tmp;

	if (Array.isArray(val)) {
		out = Array(k=val.length);
		while (k--) out[k] = (tmp=val[k]) && typeof tmp === 'object' ? klona(tmp) : tmp;
		return out;
	}

	if (Object.prototype.toString.call(val) === '[object Object]') {
		out = {}; // null
		for (k in val) {
			if (k === '__proto__') {
				Object.defineProperty(out, k, {
					value: klona(val[k]),
					configurable: true,
					enumerable: true,
					writable: true,
				});
			} else {
				out[k] = (tmp=val[k]) && typeof tmp === 'object' ? klona(tmp) : tmp;
			}
		}
		return out;
	}

	return val;
}

var myCopy = null;

Run results for: Lodash cloneDeep vs structuredClone vs Klona 3

https://developer.mozilla.org/en-US/docs/Web/API/structuredClone

Native structuredClone

Klona

Lodash