Benchmark: Access to Proxy vs Object v2

Script Preparation code:

const object = {
    value: 'data',
    get: function (name) {
        return object[name]
    }
};
const proxy = new Proxy(object, {});
const proxyWithHandler = new Proxy(object, {
    get(target, prop, receiver) {
        return Reflect.get(target, prop, receiver)
    }
});

Tests:

Object access
object.value;
Proxy access
proxy.value
Proxy with get handler access
proxyWithHandler.value
Functional
object.get('value')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object access
Proxy access
Proxy with get handler access
Functional

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:128.0) Gecko/20100101 Firefox/128.0

Browser/OS: Firefox 128 on Linux

View result in a separate tab

Test name	Executions per second
Object access	1754861952.0 Ops/sec
Proxy access	324131776.0 Ops/sec
Proxy with get handler access	34055408.0 Ops/sec
Functional	1748108672.0 Ops/sec

Autogenerated LLM Summary (model gpt-4o-mini, generated 2 months ago):

LLMs can make mistakes. Check important info.

The benchmark titled "Access to Proxy vs Object v2" evaluates the performance differences between accessing JavaScript objects directly versus accessing them through `Proxy` objects, both with and without custom handler functions. Below is a detailed description of what each option tests, potential pros and cons, and other considerations.

### Options Compared

1. **Object Access** (`object.value;`)
   - **Description**: This test measures the direct access to a property of a standard JavaScript object.
   - **Performance**: Expected to perform best since it involves straightforward property access without any overhead.
  
2. **Proxy Access** (`proxy.value`)
   - **Description**: This test involves accessing the same property through a `Proxy` object without any custom handler.
   - **Performance**: This will incur some overhead as the `Proxy` wraps around the original object, but without any special behavior defined.
   
3. **Proxy with Handler Access** (`proxyWithHandler.value`)
   - **Description**: This test measures the access of the property through a Proxy that includes a custom handler for the `get` operation.
   - **Performance**: This test is expected to have the most overhead due to invoking the handler, regardless of it being a simple `Reflect.get` call.
   
4. **Functional Access** (`object.get('value')`)
   - **Description**: This tests accessing an object property through a method.
   - **Performance**: This is generally slower than direct access due to function call overhead, but might not be as slow as accessing via a Proxy.

### Pros and Cons of Different Approaches

- **Direct Object Access**:
  - **Pros**: Fastest and cleanest approach for accessing object properties.
  - **Cons**: Does not allow for any interception or additional functionality (e.g., validation, logging).

- **Proxy Access**:
  - **Pros**: Enables interception, customization, and advanced functionalities for property access without altering the original object's structure.
  - **Cons**: Introduces some overhead and can be less intuitive for developers new to `Proxy`.

- **Proxy with Handler Access**:
  - **Pros**: Provides maximum flexibility to modify behavior dynamically (e.g., logging access, validating data).
  - **Cons**: Has the slowest performance due to handler invocations. Additionally, using a `Proxy` can complicate debugging and understanding code flow.

- **Functional Access**:
  - **Pros**: Encapsulates behavior and can provide additional functionality like transformation or validation.
  - **Cons**: Involves function call overhead, making it slower than direct property access.

### Other Considerations

- **Use Cases**: The choice between using direct, proxy-based, or functional access should be driven by the specific requirements of your application. If performance is critical and you don't need interception, direct access is preferable. If you need dynamic and flexible control over property access, consider using Proxies.

- **Browser Support**: Proxies are a relatively newer feature in JavaScript (introduced in ES6), so it's essential to understand their compatibility across different environments.

### Alternatives

Other than using standard objects and proxies, you might also consider:

- **Maps & Sets**: For storing key-value pairs in a more structured way. They offer better performance for certain operations (like checking existence) but do not have the same property access features.

- **Custom Classes**: If you require more complex behaviors while keeping track of the state, you can design a custom class that uses getters/setters to control property access.

- **Functional Programming Techniques**: Rather than using objects or Proxies for state, consider using higher-order functions to handle logic and state co-located, promoting immutability and reducing side effects.

In summary, the benchmark clearly outlines how different methods of accessing object properties can significantly affect performance, with direct object access being the most efficient, while proxies offer increased flexibility at the cost of speed. The choice of which approach to use should depend on the specific requirements of your project.

Related benchmarks:

Access to Proxy vs Object v2 (version: 1)

Comparing performance of: Object access vs Proxy access vs Proxy with get handler access vs Functional

Created: 2 months ago by: Guest

Jump to the latest result

Object access

Proxy access

Proxy with get handler access

Functional

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gpt-4o-mini, generated 2 months ago):