Benchmark: get vs proxy get v2

Script Preparation code:

var obj = {d: 10,  get x() {return this.d } }
var obj2 = {d:10}
Object.defineProperty(obj2, 'x', { get() {return this.d } })

var proxyObj = new Proxy({d: 10}, {get(target, p) {return target[p]} });

Tests:

get
let x = obj.x;
proxy
let x = proxyObj.d;
define prop
let x = obj2.x

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
get
proxy
define prop

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser/OS: Chrome 133 on Linux

View result in a separate tab

get

44.9M/s

define prop

44.6M/s

proxy

24.3M/s

View exact numbers

Test name	Executions per second
✓ get	44,928,160 Ops/sec
define prop	44,649,336 Ops/sec
proxy	24,250,352 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the provided benchmark data and explain what is being tested, compared, and their pros/cons.

**Benchmark Overview**

The provided JSON defines a JavaScript microbenchmark that compares three approaches:

1. **Direct Property Access (`get`)**: This approach uses an object with a `d` property and an `x` getter function.
2. **Property Definition using Object.defineProperty (`define prop`)**: This approach creates a similar object but uses `Object.defineProperty` to define the `x` property with a getter function.
3. **Proxy Object (`proxy`)**: This approach creates a proxy object that forwards access to the underlying object's properties.

**What is being tested?**

The benchmark measures the execution time of accessing each property using the three different approaches.

**Options Compared**

Here's a brief overview of each option:

1. **Direct Property Access (`get`)**:
	* Pros: Simple and straightforward, no additional library or syntax required.
	* Cons: Might be slower due to indirect access via getter function.
2. **Property Definition using Object.defineProperty (`define prop`)**:
	* Pros: Can provide better control over property behavior (e.g., validation, caching).
	* Cons: Requires additional syntax and might incur overhead due to the `Object.defineProperty` method call.
3. **Proxy Object (`proxy`)**:
	* Pros: Can provide a more flexible and efficient way to handle complex property access scenarios.
	* Cons: Requires knowledge of Proxy objects and their usage, which can add complexity.

**Library Used**

None of the options explicitly use a library beyond what is built into JavaScript.

**Special JS Feature or Syntax**

The `proxy` option uses the Proxy object feature, which was introduced in ECMAScript 2015 (ES6). This feature allows creating proxy objects that intercept and modify property access.

**Benchmark Preparation Code Explanation**

The provided script preparation code sets up the three test cases:

* `obj` and `obj2` create two objects with a `d` property.
* The `x` getter function is defined for each object using an arrow function.
* A proxy object `proxyObj` is created using `new Proxy()` with a simple getter function that forwards access to the underlying object's properties.

**Individual Test Cases**

Each test case measures the execution time of accessing a specific property:

1. **Direct Property Access (`get`)**: Measures the execution time of accessing the `x` property directly on `obj`.
2. **Property Definition using Object.defineProperty (`define prop`)**: Measures the execution time of accessing the `x` property defined using `Object.defineProperty` on `obj2`.
3. **Proxy Object (`proxy`)**: Measures the execution time of accessing the `d` property on the proxy object `proxyObj`.

**Alternative Approaches**

If you're interested in exploring alternative approaches, consider:

* Using a library like Lodash or Underscore.js to implement the `x` getter function or create the proxy object.
* Implementing the `get`, `define prop`, and `proxy` approaches using a different JavaScript syntax, such as ES7's optional chaining (`?.`) or arrow functions.

Keep in mind that these alternatives might introduce additional complexity or overhead, so it's essential to weigh their pros and cons before choosing an approach.

get vs proxy get v2 (version: 0)

Comparing performance of: `get vs proxy vs define prop`

Created: 3 years ago by: Guest

Go to the latest result

get

proxy

define prop

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

get vs proxy get v2 (version: 0)

Comparing performance of: get vs proxy vs define prop

Created: 3 years ago by: Guest

Go to the latest result

get

proxy

define prop

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

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Comparing performance of: `get vs proxy vs define prop`