Run results for: Object.assign vs prototype

Run details:

User agent: Mozilla/5.0 (X11; Fedora; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.100 Safari/537.36

Browser: Chrome 54

Operating system: Fedora

Device Platform: Other

Date tested: 8 years ago

Test name	Executions per second
Extend prototype	2359.0 Ops/sec
Object.assign	1906.0 Ops/sec

Tests:

Extend prototype
for (let i = 0; i < 1000; i++) { String.prototype.toBinary = function () { let output = ''; for (let i = 0; i < this.length; i++) { output += this[i].charCodeAt(0).toString(2) + " "; } return output; } String.prototype.toHex = function () { let output = ''; for (let i = 0; i < this.length; i++) { output += this[i].charCodeAt(0).toString(8) + " "; } return output; } }
Object.assign
for (let i = 0; i < 1000; i++) { Object.assign(String.prototype, { toBinary() { let output = ''; for (let i = 0; i < this.length; i++) { output += this[i].charCodeAt(0).toString(2) + " "; } return output; }, toHex() { let output = ''; for (let i = 0; i < this.length; i++) { output += this[i].charCodeAt(0).toString(8) + " "; } return output; } }); }