Benchmark: Access to Proxy chain

Script Preparation code:

object = { value: 'data' };
proxy1 = new Proxy(object, {})
proxy2 = new Proxy(new Proxy(object, {}), {} ) 
proxy3 = new Proxy( new Proxy(new Proxy(object, {}), {} ), {})

Tests:

Object access
object.value;
Proxy access
proxy1.value
Proxy access 2 layer
proxy2.value
Proxy access 3 layer
proxy3.value

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object access
Proxy access
Proxy access 2 layer
Proxy access 3 layer

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Mobile Safari/537.36

Browser/OS: Chrome Mobile 113 on Android

View result in a separate tab

Test name	Executions per second
Object access	3925201.8 Ops/sec
Proxy access	3047743.0 Ops/sec
Proxy access 2 layer	2780803.0 Ops/sec
Proxy access 3 layer	2487806.2 Ops/sec

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

LLMs can make mistakes. Check important info.

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

**Benchmark Definition**

The benchmark definition represents a JavaScript microbenchmark that measures the performance of accessing an object through different proxy layers. The script preparation code creates three proxies: `proxy1`, `proxy2`, and `proxy3`. Each proxy has one or more objects nested inside it, with the value "data" at the top level.

**Test Cases**

The benchmark defines four test cases:

1. **Object access**: Accessing `object.value`.
2. **Proxy access**: Accessing `proxy1.value`.
3. **Proxy access 2 layer**: Accessing `proxy2.value` (i.e., accessing the nested object through another proxy).
4. **Proxy access 3 layer**: Accessing `proxy3.value` (i.e., accessing the deepest nested object through multiple proxies).

**Options Compared**

The benchmark compares the execution times for each test case:

* Directly accessing the innermost object (`object.value`)
* Accessing an intermediate proxy (`proxy1.value`)
* Accessing a proxy that itself accesses another proxy (`proxy2.value`)
* Accessing a proxy that accesses two intermediate proxies (`proxy3.value`)

**Pros and Cons**

The choice of approach depends on the specific use case. Here are some general pros and cons:

* Direct access to `object.value`: Fast, but might be less efficient in terms of memory management.
* Using an intermediate proxy: Can provide additional benefits like caching or logging, but might introduce overhead due to the extra layer of indirection.
* Accessing multiple proxies: May lead to increased overhead due to the repeated traversal of nested objects.

**Library and Purpose**

The `Proxy` object is a built-in JavaScript constructor that creates a proxy object. A proxy object can intercept and manipulate access to its target object's properties, allowing for features like:

* Caching
* Logging
* Validation

In this benchmark, the proxies are used to demonstrate the performance implications of traversing nested objects.

**Special JS Feature or Syntax**

This benchmark does not use any special JavaScript features or syntax. It only relies on standard JavaScript constructs, including `Proxy` and object literals.

**Alternatives**

Other alternatives for measuring browser performance might include:

* V8's `perf` API: Provides a low-level interface for benchmarking and profiling JavaScript code.
* WebAssembly: Allows for benchmarking the performance of compiled JavaScript code in a more efficient way.
* CPU-bound benchmarks: Measure the execution time of computationally intensive tasks, like matrix multiplication or encryption.

For measuring browser-specific performance, alternatives might include:

* Browser's built-in benchmarking tools (e.g., Chrome DevTools' Benchmarking tool)
* Third-party benchmarking libraries (e.g., `benchmark`)

Keep in mind that the choice of alternative depends on the specific use case and requirements.

Related benchmarks:

Access to Proxy chain (version: 0)

Comparing performance of: Object access vs Proxy access vs Proxy access 2 layer vs Proxy access 3 layer

Created: one year ago by: Guest

Jump to the latest result

Object access

Proxy access

Proxy access 2 layer

Proxy access 3 layer

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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