Benchmark: __proto__ vs getPrototypeOf

Tests:

__proto__
({}).__proto__
Object.getPrototypeOf
Object.getPrototypeOf({})
Reflect.getPrototypeOf
Reflect.getPrototypeOf({})

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
__proto__
Object.getPrototypeOf
Reflect.getPrototypeOf

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one month ago)

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Mobile Safari/537.36

Browser/OS: Chrome Mobile 131 on Android

View result in a separate tab

Test name	Executions per second
__proto__	42459604.0 Ops/sec
Object.getPrototypeOf	3649503.5 Ops/sec
Reflect.getPrototypeOf	3612179.8 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 2 months ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark compares three ways to access an object's prototype chain in JavaScript: `__proto__`, `Object.getPrototypeOf()`, and `Reflect.getPrototypeOf()`.

**Options Compared**

1. **`__proto__`**: This is a legacy way of accessing an object's prototype chain using the `__proto__` property.
2. **`Object.getPrototypeOf()`**: This method was introduced in ECMAScript 2015 (ES6) to access an object's prototype chain. It returns a new `Prototype` object that represents the next level in the prototype chain of the original object.
3. **`Reflect.getPrototypeOf()`**: This is a newer way of accessing an object's prototype chain using the Reflect API, which was introduced in ECMAScript 2018 (ES9). It also returns a new `Prototype` object representing the next level in the prototype chain.

**Pros and Cons**

*   **`__proto__`**: Pros: Widely supported, easy to understand. Cons: Not as explicit or modern as other options.
*   **`Object.getPrototypeOf()`**: Pros: Modern, explicit way of accessing the prototype chain. Cons: Only available since ES6, might require more effort for developers who haven't used it before.
*   **`Reflect.getPrototypeOf()`**: Pros: Newer, simpler syntax than `Object.getPrototypeOf()`, even easier to read and write. Cons: Still a relatively new API (introduced in ES9), not as widely supported yet.

**Library Usage**

None of the benchmark cases use external libraries; they all rely on built-in JavaScript features.

**Special JS Feature or Syntax**

All three options (`__proto__`, `Object.getPrototypeOf()`, and `Reflect.getPrototypeOf()`) utilize built-in JavaScript syntax, so there are no special features or syntaxes mentioned in this benchmark.

Related benchmarks:

proto vs getPrototypeOf (version: 0)

Comparing performance of: proto vs Object.getPrototypeOf vs Reflect.getPrototypeOf

Created: one year ago by: Registered User

Jump to the latest result

proto

Object.getPrototypeOf

Reflect.getPrototypeOf

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 2 months ago):

__proto__ vs getPrototypeOf (version: 0)

Comparing performance of: __proto__ vs Object.getPrototypeOf vs Reflect.getPrototypeOf

Created: one year ago by: Registered User

Jump to the latest result

__proto__

Object.getPrototypeOf

Reflect.getPrototypeOf

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 2 months ago):

proto vs getPrototypeOf (version: 0)

Comparing performance of: proto vs Object.getPrototypeOf vs Reflect.getPrototypeOf

proto