Benchmark: Object.assign vs prototype

Script Preparation code:

class TestClass extends String {
}

Tests:

Extend prototype
TestClass.prototype.toBinary = function () { let output = ''; for (let i = 0; i < this.length; i++) { output += this[i].charCodeAt(0).toString(2) + " "; } return output; } TestClass.prototype.toHex = function () { let output = ''; for (let i = 0; i < this.length; i++) { output += this[i].charCodeAt(0).toString(8) + " "; } return output; } for (let i = 0; i < 1000; i++) { let t = new TestClass("test"); console.log(t.toString(), t.toBinary(), t.toHex()); }
Object.assign
Object.assign(TestClass, { 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; } }); for (let i = 0; i < 1000; i++) { let t = new TestClass("test"); console.log(t.toString(), t.toBinary(), t.toHex()); }

Rendered benchmark preparation results:

Previous results

Test case name	Result
Extend prototype
Object.assign

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Object.assign vs prototype (version: 0)