Benchmark: Another Proxy Test

Script Preparation code:

let translation = {
    KEY: 'value'
};

function getTranslation(k) {
    return translation[k];
}

function getProxied1Translation(k) {
    const proxyHandler = {
        get: function(target, prop) {
            if (!target[prop]) {
                return 'missing'
            }
            return target[prop];
        }
    };
    return new Proxy(translation, proxyHandler)
}

function getProxied2Translation(k) {
    const proxyHandler = {
        get: function(target, prop) {
            if (!target[prop]) {
                return 'missing'
            }
            return Reflect.get(target, prop);
        }
    };
    return new Proxy(translation, proxyHandler)
}

Tests:

Get existing translation
getTranslation('KEY')
get Proxied 1 translation: existing
getProxied1Translation('KEY')
get Proxied 1 translation: non existent
getProxied1Translation('NOERROR')
get Proxied 2 translation: existing
getProxied2Translation('KEY')
get Proxied 2 translation: non existent
getProxied2Translation('NOERROR')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Get existing translation
get Proxied 1 translation: existing
get Proxied 1 translation: non existent
get Proxied 2 translation: existing
get Proxied 2 translation: non existent

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):

LLMs can make mistakes. Check important info.

Let's break down the benchmark and its various components.

**Benchmark Definition**

The provided JSON defines a JavaScript microbenchmark called "Another Proxy Test". This benchmark tests the performance of two different proxying approaches in JavaScript, specifically when retrieving values from an object using the `get` method.

**Script Preparation Code**

The script preparation code includes:

*   A definition for a translation object (`translation`) with a single key-value pair.
*   Two functions that create proxies over this translation object:
    *   `getProxied1Translation`: uses the traditional proxying syntax to define a proxy handler.
    *   `getProxied2Translation`: uses the modern Proxy API with `Reflect.get` to define a proxy handler.

**Html Preparation Code**

There is no HTML preparation code provided, indicating that this benchmark does not require any specific HTML setup or test cases involving DOM manipulation.

**Individual Test Cases**

The individual test cases are designed to measure the performance of each proxying approach under different scenarios:

1.  **Get existing translation**: Retrieves a value from the `translation` object using the `getTranslation` function.
2.  **get Proxied 1 translation: existing**: Similar to the previous case, but uses the `getProxied1Translation` function.
3.  **get Proxied 1 translation: non-existent**: Tries to retrieve a value from the proxy using a key that does not exist in the object.
4.  **get Proxied 2 translation: existing**: Similar to the previous case, but uses the `getProxied2Translation` function.
5.  **get Proxied 2 translation: non-existent**: Tries to retrieve a value from the proxy using a key that does not exist in the object.

**Library and Purpose**

*   The modern Proxy API is used in both `getProxied1Translation` and `getProxied2Translation`. This library provides a way to create custom access control for objects, allowing you to intercept and modify property accesses.
*   There are no external libraries beyond the standard JavaScript features.

**Special JS Features or Syntax**

The benchmark uses modern JavaScript features like Proxy API (`Reflect.get`) and modern syntax (ES2015+). It does not require any special browser support.

**Options Compared**

Two proxying approaches are compared:

1.  **Traditional proxying syntax**: Used in `getProxied1Translation`, which defines a proxy handler using an object literal.
2.  **Modern Proxy API with Reflect.get**: Used in `getProxied2Translation`, which uses the modern Proxy API's `Reflect.get` method to access properties.

**Pros and Cons**

*   Traditional proxying syntax:
    *   Pros: more widely supported, generally easier to read and understand.
    *   Cons: can be less efficient due to overhead of creating a new object and handling proxy methods.
*   Modern Proxy API with Reflect.get:
    *   Pros: more efficient, modern syntax is often preferred for its readability.
    *   Cons: requires support for the modern Proxy API and `Reflect.get`.

**Other Alternatives**

If you need alternative benchmarking approaches, consider the following:

1.  **Benchmarking a specific JavaScript feature**: Measure performance of a specific feature or syntax using microbenchmarking tools like Benchmark.js or WebKit.
2.  **Comparing different JavaScript engines**: Use benchmarks to compare performance differences between various JavaScript engines (e.g., V8, SpiderMonkey, and Chakra).
3.  **Benchmarking the impact of optimizations**: Test the effects of specific compiler optimizations on code execution speed.

These alternatives can provide valuable insights into performance optimization techniques and engine-specific nuances.

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/112.0

Browser/OS: Firefox 112 on Linux

View result in a separate tab

Test name	Executions per second
Get existing translation	637750848.0 Ops/sec
get Proxied 1 translation: existing	3134555.2 Ops/sec
get Proxied 1 translation: non existent	3354842.8 Ops/sec
get Proxied 2 translation: existing	3280532.5 Ops/sec
get Proxied 2 translation: non existent	3357308.2 Ops/sec

Related benchmarks:

Another Proxy Test (version: 0)

Comparing performance of: Get existing translation vs get Proxied 1 translation: existing vs get Proxied 1 translation: non existent vs get Proxied 2 translation: existing vs get Proxied 2 translation: non existent

Created: one year ago by: Guest

Jump to the latest result

Get existing translation

get Proxied 1 translation: existing

get Proxied 1 translation: non existent

get Proxied 2 translation: existing

get Proxied 2 translation: non existent

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):